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19-2924; Rev 2; 1/05
15kV ESD-Protected USB Transceivers
General Description
The MAX3453E-MAX3456E 15kV ESD-protected USBcompliant transceivers interface low-voltage ASICs with USB devices. The devices fully comply with USB 1.1 and USB 2.0 when operating at full (12Mbps) and low (1.5Mbps) speeds. The MAX3453E-MAX3456E operate with VL as low as +1.65V, ensuring compatibility with low-voltage ASICs. The MAX3453E-MAX3456E feature a logic-selectable suspend mode that reduces current consumption to less than 40A. Integrated 15kV ESD protection protects the USB D+ and D- bidirectional bus connections. The MAX3453E supports only full-speed (12Mbps) operation. The MAX3453E/MAX3454E feature an internal 1.5k USB pullup resistor and an enumeration function that allows devices to logically disconnect while plugged in. The MAX3453E/MAX3455E provide a pushpull bus-detect (BD) output that asserts high when VBUS > +4.0V. The MAX3456E is pin compatible with Micrel's MIC2550A. The MAX3453E-MAX3456E operate over the extended temperature range (-40C to +85C) and are available in 14-pin TSSOP and 16-pin (3mm x 3mm) thin QFN packages. 15kV ESD Protection on D+ and D USB 1.1 and USB 2.0 (Low-Speed and Full-Speed)Compliant Transceivers Combined VP and VM Inputs/Outputs +1.65V to +3.6V VL Logic Supply Input for Interfacing with Low-Voltage ASICs Enumerate Input Function (MAX3453E/MAX3454E) Powered from Li+ Battery as Low as +3.1V (MAX3454E/MAX3456E) VBUS Detection (MAX3453E/MAX3455E) Pin Compatible with Micrel MIC2550A (MAX3456E) Internal Pullup Resistor (MAX3453E/MAX3454E) No Power-Supply Sequencing Required
Features
MAX3453E-MAX3456E
Ordering Information
PART MAX3453EEUD MAX3453EETE MAX3454EEUD MAX3454EETE MAX3455EEUD MAX3455EETE MAX3456EEUD MAX3456EETE TEMP RANGE -40 C to +85 C -40oC to +85oC -40 C to +85 C -40oC to +85oC -40oC to +85oC -40 C to +85 C -40oC to +85oC -40oC to +85oC
o o o o o o
PIN-PACKAGE 14 TSSOP 16 Thin QFN 14 TSSOP 16 Thin QFN 14 TSSOP 16 Thin QFN 14 TSSOP 16 Thin QFN
Applications
PDAs PC Peripherals Cellular Telephones Data Cradles MP3 Players
Selector Guide
PART MAX3453E MAX3454E MAX3455E MAX3456E VBUS POWERSUPPLY VOLTAGE (V) 4.0 to 5.5 3.0 to 5.5 4.0 to 5.5 3.0 to 5.5 VL POWERSUPPLY VOLTAGE (V) 1.65 to 3.6 1.65 to 3.6 1.65 to 3.6 1.65 to 3.6 INTERNAL PULLUP RESISTOR Yes Yes No No VBUS LEVEL DETECT Yes No Yes No ENUMERATE Yes Yes No No USB SPEED SUPPORTED Full Low/full Low/full Low/full 15kV ESD PROTECTION Yes Yes Yes Yes
Typical Operating Circuit appears at end of data sheet. Pin Configurations appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
15kV ESD-Protected USB Transceivers MAX3453E-MAX3456E
ABSOLUTE MAXIMUM RATINGS
VBUS, VL, D+, D- to GND.......................................-0.3V to +6.0V VTRM to GND ............................................-0.3V to (VBUS + 0.3V) VP, VM, SUS, ENUM, SPD, RCV, OE, BD to GND ................................-0.3V to (VL + 0.3V) Current (into any pin) ........................................................15mA Short-Circuit Current (D+ and D-)...................................150mA Continuous Power Dissipation (TA = +70C) 14-Pin TSSOP (derate 9.1mW/C above +70C) .........727mW 16-Pin Thin QFN (derate 14.7mW/C above +70C)....1176mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VBUS = +4.0V to +5.5V or VTRM = +3.0V to +3.6V, VL = +1.65V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VBUS = +5.0V, VL = +2.5V, and TA = +25C.) (Note 1)
PARAMETER SUPPLY INPUTS (VBUS, VTRM, VL) Regulated Supply Voltage Output Operating Supply Current Operating VL Supply Current Full-Speed Idle and SE0 Supply Current Static VL Supply Current VTRM IVBUS IVL IVBUS(IDLE) Internal regulator Full-speed transmitting and receiving at 12Mbps, CL = 50pF on D+ and D- (Note 2) Full-speed transmitting and receiving at 12Mbps (Note 2) Full-speed idle: VD+ > 2.7V, VD- < 0.3V SE0: VD+ < 0.3V, VD- < 0.3V Full-speed idle, SE0, or suspend mode MAX3453E/MAX3455E MAX3454E/MAX3456E 250 250 3.0 3.3 3.6 10 2.5 350 350 15 A 5 V mA mA A SYMBOL CONDITIONS MIN TYP MAX UNITS
IVL(STATIC)
Suspend Supply Current
MAX3453E (ENUM = low), VM = VP = open, MAX3455E IVBUS(SUSP) SUS = OE = high MAX3454E (ENUM = low), MAX3456E
40 A 35 20 A
Disable Mode Supply Current
IVBUS(DIS)
VL = GND or open MAX3453E/MAX3455E
Sharing Mode VL Supply Current
VBUS = GND or open, OE = low, IVL(SHARING) VP = low or high, VM = low or high, SUS = high
20 A
MAX3454E/MAX3456E
5 20 5 A A
D+/D- Sharing Mode Load Current D+/D- Disable Mode Load Current
ID_(SHARING) VBUS = GND or open, VD_ = 0 or +5.5V ID_(DIS) VL = GND or open, VD_ = 0 or +5.5V
2
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15kV ESD-Protected USB Transceivers
DC ELECTRICAL CHARACTERISTICS (continued)
(VBUS = +4.0V to +5.5V or VTRM = +3.0V to +3.6V, VL = +1.65V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VBUS = +5.0V, VL = +2.5V, and TA = +25C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MAX3453E/MAX3455E, supply lost MAX3453E/MAX3455E, supply present USB Power-Supply Detection Threshold VTH_VBUS MAX3454E/MAX3456E, supply lost MAX3454E/MAX3456E, supply present (Note 3) USB Power-Supply Detection Hysteresis VL Power-Supply Detection Threshold Input Voltage Low Input Voltage High Output Voltage Low Output Voltage High Input Leakage Current Input Capacitance ANALOG INPUTS/OUTPUTS (D+, D-) Differential Input Sensitivity Differential Common-Mode Voltage Single-Ended Input Low Voltage Single-Ended Input High Voltage Hysteresis Output Voltage Low Output Voltage High Off-State Leakage Current Transceiver Capacitance Driver Output Impedance Input Impedance Internal Pullup Resistance ESD PROTECTION (D+, D-) Human Body Model IEC 1000-4-2 Contact Discharge 15 8 kV kV VID VCM VILSE VIHSE VHYST VOLD VOHD ILZ CIND ZDRV ZIN RPULLUP Measured from D_ to GND Steady-state drive Driver off ILOAD = 500A (MAX3453E/MAX3454E) (Note 4) 3.5 10 1.425 1.575 RL = 1.5k to +3.6V RL = 15k to GND 2.8 -1 20 15.5 2.0 250 0.3 3.6 +1 |VD+ - VD-| Includes VID range 0.2 0.8 2.5 0.8 V V V V mV V V A pF M k VHYST_VBUS VTH_VL MAX3453E/MAX3455E MAX3454E/MAX3456E 3.6 40 75 0.85 mV V 4.0 0.8 V MIN TYP MAX 3.6 UNITS
MAX3453E-MAX3456E
DIGITAL INPUTS/OUTPUTS (VP, VM, RCV, SUS, OE, SPD, BD, ENUM) VIL VIH VOL VOH ILKG CIN Measured from input to GND VM, VP, SUS, SPD, ENUM, OE VM, VP, SUS, SPD, ENUM, OE VM, VP, RCV, BD, IOL = +2mA VM, VP, RCV, BD, IOH = -2mA VL - 0.4 -1 10 +1 0.7 x VL 0.4 0.3 x VL V V V V A pF
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3
15kV ESD-Protected USB Transceivers MAX3453E-MAX3456E
TIMING CHARACTERISTICS
(VBUS = +4.0V to +5.5V or VTRM = +3.0V to +3.6V, VL = +1.65V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VBUS = +5V, VL = +2.5V, and TA = +25C.) (Note 1)
PARAMETER Rise Time Fall Time Rise/Fall-Time Matching (Note 2) Output Signal Crossover Voltage (Note 2) Driver Propagation Delay Driver Disable Delay Driver Enable Delay SYMBOL tFR tFF tFR / tFF VCRS_F tPLH_DRV tPHL_DRV tPHZ_DRV tPLZ_DRV tPZH_DRV tPZL_DRV tLR tLF tLR / tLF VCRS_L CONDITIONS 10% to 90% of |VOHD - VOLD|, Figures 1, 6 90% to 10% of |VOHD - VOLD|, Figures 1, 6 Excluding the first transition from idle state, Figures 1, 6 Excluding the first transition from idle state, Figures 2, 6 Low-to-high transition, Figures 2, 6 High-to-low transition, Figures 2, 6 High-to-off transition, Figure 3 Low-to-off transition, Figure 3 Off-to-high transition, Figure 3 Off-to-low transition, Figure 3 10% to 90% of |VOHD - VOLD|, Figures 1, 6 90% to 10% of |VOHD - VOLD|, Figures 1, 6 Excluding the first transition from idle state, Figures 1, 6 Excluding the first transition from idle state, Figures 2, 6 Low-to-high transition, Figures 4, 6 High-to-low transition, Figures 4, 6 Low-to-high transition, Figures 4, 6 High-to-low transition, Figures 4, 6 High-to-off transition, Figure 5 Low-to-off transition, Figure 5 Off-to-high transition, Figure 5 Off-to-low transition, Figure 5 75 75 80 1.3 MIN 4 4 90 1.3 TYP MAX 20 20 110 2.0 18 18 20 20 20 20 300 300 125 2.0 UNITS ns ns % V ns ns ns ns ns ns ns % V
DRIVER CHARACTERISTICS (Full-Speed Mode, CL = 50pF)
DRIVER CHARACTERISTICS (low-speed mode, CL = 200pF to 600pF, MAX3454E/MAX3455E/MAX3456E) Rise Time Fall Time Rise/Fall-Time Matching Output Signal Crossover Voltage
RECEIVER CHARACTERISTICS (CL = 15pF) Differential Receiver Propagation Delay Single-Ended Receiver Propagation Delay Single-Ended Receiver Disable Delay Single-Ended Receiver Enable Delay tPLH_RCV tPHL_RCV tPLH_SE tPHL_SE tPHZ_SE tPLZ_SE tPZH_SE tPZL_SE 22 22 12 12 15 15 15 15 ns ns ns ns
Note 1: Note 2: Note 3: Note 4:
Parameters are 100% production tested at +25C, unless otherwise noted. Limits over temperature are guaranteed by design. Guaranteed by design, not production tested. Production tested to +2.7V for VL < +3.0V. Including external 27 series resistor.
4
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15kV ESD-Protected USB Transceivers
Typical Operating Characteristics
(VBUS = +5.0V, VL = +3.3V, TA = +25C, unless otherwise noted.)
SINGLE-ENDED RECEIVER PROPAGATION DELAY vs. VL
MAX3453E-56E toc01
MAX3453E-MAX3456E
RISE-/FALL-TIME MATCHING (FULL SPEED)
MAX3453E-56E toc02
RISE-/FALL-TIME MATCHING (LOW SPEED)
MAX3453E-56E toc03
8 CL = 15pF 7 PROPAGATION DELAY (ns) TA = +25C 6 5 4 3 2 1 0 TA = -40C TA = +85C
CL = 50pF
CL = 400pF
D+/D1V/div
D+/D1V/div
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 VL (V)
20ns/div
100ns/div
OE, VP, VM TIMING
MAX3453E-56E toc04
SUPPLY CURRENT vs. D+/D- CAPACITANCE
MAX3453E-56E toc05
LOGIC SUPPLY CURRENT vs. D+/D- CAPACITANCE
450 LOGIC SUPPLY CURRENT (A) 400 350 300 250 200 150 100 50 0 0 SPD = GND, fIN = 750kHz 50 100 150 200 250 300 350 400 D+/D- CAPACITANCE (pF) SPD = VL, fIN = 6MHz
MAX3453E-56E toc06
CL = 15pF
VP 2V/div SUPPLY CURRENT (mA)
24 22 20 18 16 14 12 10 8 6 4 2 0 0 50
500
VM 2V/div
SPD = VL, fIN = 6MHz
OE 5V/div
SPD = GND, fIN = 750kHz 100 150 200 250 300 350 400 D+/D- CAPACITANCE (pF)
20ns/div
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5
15kV ESD-Protected USB Transceivers MAX3453E-MAX3456E
Pin Description
PIN MAX3454E/ MAX3455E/ MAX3456E TSSOP THIN QFN MAX3453E
NAME
FUNCTION
TSSOP
THIN QFN Digital I/O Connections Logic Supply. Connect a +1.65V to +3.6V supply to VL. Bypass VL to GND with a 0.1F ceramic capacitor. Speed Selector Input. Connect SPD to GND to select the lowspeed data rate (1.5Mbps). Connect SPD to VL to select the fullspeed data rate (12Mbps). The MAX3453E only supports fullspeed operation. Differential Receiver Output. RCV responds to the differential inputs on D+ and D- (see Tables 3, 4). RCV asserts low if SUS = VL. Receiver Output/Driver Input. VP functions as a receiver output when OE = VL. VP duplicates D+ when receiving. VP functions as a driver input when OE = GND. Receiver Output/Driver Input. VM functions as a receiver output when OE = VL. VM duplicates D- when receiving. VM functions as a driver input when OE = GND. No Connection. Not internally connected. *Pin 13 is No Connection for MAX3456E only. Ground Suspend Input. Drive SUS low for normal operation. Drive SUS high to put the MAX3453E-MAX3456E into suspend mode. RCV asserts low in suspend mode. VP and VM remain active in suspend mode. Output Enable. Drive OE to GND to enable the transmitter outputs. Drive OE to VL to disable the transmitter outputs. OE also controls the I/O direction of VP and VM (see Tables 3, 4). USB Input/Output. For OE = GND, D- functions as a USB output, with VM providing the input signal. For OE = VL, Dfunctions as a USB input, with VM functioning as a single-ended receiver output. Connect a 1.5k resistor from D- to VTRM for low-speed (1.5Mbps) operation (MAX3455E/MAX3456E). Drive ENUM to VL to connect the internal 1.5k resistor from D- to VTRM for low-speed (MAX3454E, SPD = GND) operation.
1
15
1
15
VL
2
1
--
--
SPD
3
2
3
2
RCV
4
3
4
3
VP
5
4
5
4
VM
6, 13* 7
5, 8, 13*, 16 6
6 7
5, 8, 16 6
N.C. GND
8
7
8
7
SUS
9
9
9
9
OE
10
10
10
10
D-
6
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15kV ESD-Protected USB Transceivers
Pin Description (continued)
PIN MAX3454E/ MAX3455E/ MAX3456E TSSOP THIN QFN MAX3453E
MAX3453E-MAX3456E
NAME
FUNCTION
TSSOP
THIN QFN USB Input/Output. For OE = GND, D+ functions as a USB output, with VP providing the input signal. For OE = VL, D+ functions as a USB input, with VP functioning as a single-ended receiver output. Connect a 1.5k resistor from D+ to VTRM for full-speed (12Mbps) operation (MAX3455E/MAX3456E). Drive ENUM to VL to connect the internal 1.5k resistor (MAX3453E/ MAX3454E) from D+ to VTRM for full-speed (MAX3454E, SPD = VL) operation. Internal Regulator Output. VTRM provides a regulated +3.3V output. Bypass VTRM to GND with a 1F (min) ceramic capacitor as close to the device as possible. VTRM normally derives power from VBUS. Alternatively, drive VTRM directly with a +3.3V 10% supply (MAX3454E/MAX3456E). VTRM provides power to internal circuitry and provides the pullup voltage for an external USB pullup resistor (MAX3455E/MAX3456E). Do not use VTRM to power external circuitry. Bus-Detection Output (MAX3453E/MAX3455E). The push-pull BD output asserts low and the device enters sharing mode if VBUS < +3.6V. BD asserts high if VBUS > +4.0V. Enumerate Function Selection Input (MAX3453E/MAX3454E). Drive ENUM to VL to connect the internal 1.5k resistor between VTRM and D+ or D-, depending on the state of SPD. Drive ENUM to GND to disconnect the internal 1.5k resistor. For SPD = VL, the 1.5k resistor connects to D+. For SPD = GND, the 1.5k resistor connects to D-. For the MAX3453E, the resistor only connects to D+. USB Power-Supply Input. Connect a +4.0V to +5.5V power supply to VBUS. VBUS provides power to the internal linear regulator. Bypass VBUS to GND with a 0.1F ceramic capacitor as close to the device as possible. Connect VBUS and VTRM together when powering the MAX3454E/MAX3456E with an external power supply (+3.3V 10%).
11
11
11
11
D+
12
12
12
12
VTRM
13 13 (MAX3455E (MAX3455E only) only)
13
13
BD
13 13 (MAX3454E (MAX3454E only) only)
2
1
ENUM
14
14
14
14
VBUS
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7
15kV ESD-Protected USB Transceivers MAX3453E-MAX3456E
Functional Diagram
MAX3453E
TO INTERNAL CIRCUITRY BD VTH_VBUS VL LDO REGULATOR VBUS
VTRM
VP
D+ D-
VM OE
LEVEL TRANSLATOR
RCV
SUS
TO INTERNAL CIRCUITRY
1.5k VTRM
ENUM
GND
8
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15kV ESD-Protected USB Transceivers
Functional Diagram (continued)
MAX3453E-MAX3456E
MAX3454E- MAX3456E
MAX3455E ONLY BD VTH_VBUS VL SPD VP LDO REGULATOR TO INTERNAL CIRCUITRY VBUS
VTRM
D+ D-
VM OE
LEVEL TRANSLATOR
RCV
SUS
TO INTERNAL CIRCUITRY
MAX3454E ONLY 1.5k VTRM SPD ENUM CONTROL LOGIC
GND
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9
15kV ESD-Protected USB Transceivers MAX3453E-MAX3456E
Detailed Description
The MAX3453E-MAX3456E USB-compliant transceivers convert single-ended or differential logic-level signals to USB signals, and USB signals to single-ended or differential logic-level signals. The MAX3453E fully complies with full-speed (12Mbps) operation under USB specification 2.0. The MAX3454E-MAX3456E fully comply with USB specification 1.1, and full-speed (12Mbps) and lowspeed (1.5Mbps) operation under USB specification 2.0. The MAX3453E-MAX3456E operate with VL as low as +1.65V, ensuring compatibility with low-voltage ASICs. The MAX3453E-MAX3456E derive power from the USB host (V BUS ) or from a single-cell Li+ battery (MAX3454E/MAX3456E) connected to VBUS or from a +3.3V regulated supply connected to VBUS and VTRM. The MAX3453E-MAX3456E meet the physical layer specifications for logic-level supply voltages (VL) from +1.65V to +3.6V. Integrated 15kV ESD protection safeguards the D+ and D- USB I/O ports. The MAX3453E/MAX3454E feature an enumerate function providing an internal 1.5k pullup resistor from D+ (MAX3453E/MAX3454E) or D- (MAX3454E only) to VTRM. The enumerate function disconnects the 1.5k pullup resistor, allowing the MAX3453E/MAX3454E to simulate a bus disconnect while powered and connected to the USB cable. The MAX3453E/MAX3455E feature a bus-detect output (BD) that asserts high if VBUS > +4V. BD asserts low if V BUS < +3.6V. The MAX3455E/MAX3456E require external pullup resistors from either D+ or D- to VTRM to utilize the appropriate bus speed. The MAX3456E is pin-for-pin compatible with the Micrel MIC2550A.
Applications Information
Power-Supply Configurations
Normal Operating Mode Connect VL and VBUS to system power supplies (Table 1). Connect VL to a +1.65V to +3.6V supply. Connect VBUS to a +4.0V to +5.5V supply. Alternatively, the MAX3454E/ MAX3456E can derive power from a single Li+ battery. Connect the battery to VBUS. Additionally, the MAX3454E/MAX3456E can derive power from a +3.3V 10% voltage regulator. Connect VBUS and VTRM to an external +3.3V voltage regulator. VBUS no longer consumes current to power the internal linear regulator in this configuration.
Table 1. Power-Supply Configurations
VBUS (V) 4.0 to 5.5 3.1 to 4.5 3.0 to 3.6 GND or floating 3.0 to 5.5 VTRM (V) 3.0 to 3.6 output 3.0 to 3.6 output 3.0 to 3.6 input High-Z High-Z VL (V) 1.65 to 3.6 1.65 to 3.6 1.65 to 3.6 1.65 to 3.6 GND or floating CONFIGURATION Normal mode Battery supply Voltage regulator supply Sharing mode Disable mode NOTES -- MAX3454E/MAX3456E MAX3454E/MAX3456E Table 2 Table 2
Table 2. Disable-Mode and Sharing-Mode Connections
INPUTS/OUTPUTS VBUS/VTRM VL D+ and DVP and VM RCV SPD (MAX3454E-MAX3456E), SUS, OE, ENUM (MAX3453E/MAX3454E) BD (MAX3453E/MAX3455E) DISABLE MODE +3.0V to +5.5V/High Impedance Floating or connected to GND High impedance Invalid* Invalid* High impedance Invalid* SHARING MODE * Floating or connected to GND (MAX3453E/MAX3454E/MAX3456E)/High Impedance * < 3.6V (MAX3453E/MAX3455E)/High Impedance 1.65V to 3.6V input High impedance High impedance for OE = low High for OE = high Undefined** High impedance Low
*High impedance or low. **High or low. 10 ______________________________________________________________________________________
15kV ESD-Protected USB Transceivers
Disable Mode Connect VBUS to a system power supply and leave VL unconnected or connect to GND. D+ and D- enter a tristate mode and VBUS (or VBUS and VTRM) consumes less than 20A of supply current. D+ and D- withstand external signals up to +5.5V in disable mode (Table 2). Sharing Mode Connect VL to a system power supply and leave VBUS (or VBUS and VTRM) unconnected or connect to GND. D+ and D- enter a tri-state mode, allowing other circuitry to share the USB D+ and D- lines, and VL consumes less than 20A of supply current. D+ and D- withstand external signals up to +5.5V in sharing mode (Table 2).
MAX3453E-MAX3456E
Table 3a. Transmit Truth Table (OE = 0, SUS = 0)
INPUTS VP 0 0 1 1 VM 0 1 0 1 D+ 0 0 1 1 OUTPUTS D0 1 0 1 RCV X 0 1 X OUTPUT STATE SE0 Logic 0 Logic 1 Undefined
X = Undefined.
Device Control OE
OE controls the direction of communication. Drive OE low to transfer data from the logic side to the USB side. For OE = low, VP and VM serve as differential driver inputs to the USB transmitter. Drive OE high to transfer data from the USB side to the logic side. For OE = high, VP and VM serve as singleended receiver outputs from the USB inputs (D+ and D-). RCV serves as a differential receiver output, regardless of the state of OE. ENUM (MAX3453E/MAX3454E) The MAX3453E/MAX3454E feature an enumerate function that allows software control of USB enumeration. USB protocol requires a 1.5k pullup resistor to D+ or D- to indicate the transmission speed to the host (see the SPD section). The MAX3453E/MAX3454E provide an internal 1.5k pullup resistor. Disconnect the pullup resistor from the circuit to simulate the removal of a device from the USB. Drive ENUM low to disconnect the internal pullup resistor. Drive ENUM high to connect the internal pullup resistor. The SPD state (MAX3454E only) determines whether the pullup resistor connects to D+ or D-. For ENUM = high, the internal pullup resistor connects to D+ when SPD = VL (full speed) or to Dwhen SPD = GND (low speed). The MAX3453E only supports full-speed operation; therefore, the pullup resistor only connects to D+ or is disconnected.
tFR, tLR VOHD 90% 90% tFF, tLF
Table 3b. Transmit Truth Table (OE = 0, SUS = 1)
INPUTS VP 0 0 1 1 VM 0 1 0 1 D+ 0 0 1 1 OUTPUTS D0 1 0 1 RCV 0 0 0 0 OUTPUT STATE SE0 Logic 0 Logic 1 Undefined
Table 4a. Receive Truth Table (OE = 1 and SUS = 0)
INPUTS D+ 0 0 1 1 D0 1 0 1 VP 0 0 1 1 OUTPUTS VM 0 1 0 1 RCV X 0 1 X OUTPUT STATE SE0 Logic 0 Logic 1 Undefined
X = Undefined.
Table 4b. Receive Truth Table (OE = 1 and SUS = 1)
INPUTS D+ 0 0 1 D0 1 0 1 VP 0 0 1 1 OUTPUTS VM 0 1 0 1 RCV 0 0 0 0 OUTPUT STATE SE0 Logic 0 Logic 1 Undefined
10% VOLD
10%
1
Figure 1. Rise and Fall Times ______________________________________________________________________________________ 11
15kV ESD-Protected USB Transceivers MAX3453E-MAX3456E
SPD (MAX3454E/MAX3455E/MAX3456E) SPD sets the transceiver speed. Connect SPD to GND to select the low-speed data rate (1.5Mbps). Connect SPD to VL to select the full-speed data rate (12Mbps). The MAX3454E provides an internal pullup resistor for selecting the bus speed. The MAX3455E and MAX3456E require an external pullup resistor to D+ or D- to set the bus speed. Connect the 1.5k resistor between D+ and VTRM to set the full-speed (12Mbps) data rate, or connect the 1.5k resistor between D- and VTRM to set the low-speed (1.5Mbps) data rate.
VM
VP AND VM RISE/FALL TIMES < 4ns
VP tPLH_DRV tPHL_DRV
D-
SUS
The SUS state determines whether the MAX3453E- MAX3456E operate in normal mode or in suspend mode. Connect SUS to GND to enable normal operation. Drive SUS high to enable suspend mode. RCV asserts low and VP and VM remain active in suspend mode (Tables 3 and 4). Supply current decreases in suspend mode (see the Electrical Characteristics). BD (MAX3453E/MAX3455E) The push-pull bus detect (BD) output monitors VBUS and asserts high if V BUS is greater than +4.0V. BD asserts low if V BUS is less than +3.6V and the MAX3453E/MAX3455E enters sharing mode (Table 2). VTRM An internal linear regulator generates the VTRM voltage (+3.3V, typ). VTRM derives power from VBUS (see the Power-Supply Configurations section). VTRM powers the internal portions of the USB circuitry and provides the pullup voltage for an external USB pullup resistor (MAX3455E/MAX3456E). Bypass VTRM to GND with a 1F ceramic capacitor as close to the device as possible. Do not use VTRM to provide power to external circuitry. D+ and DD+ and D- serve as bidirectional bus connections and are ESD protected to 15kV (Human Body Model). For OE = low, D+ and D- serve as transmitter outputs. For OE = high, D+ and D- serve as receiver inputs. VBUS For most applications, VBUS connects to the VBUS terminal on the USB connector (see the Power-Supply Configurations section). VBUS can also connect to an external supply as low as +3.1V (MAX3454E/MAX3456E). Drive VBUS low to enable sharing mode. Bypass VBUS to GND with a 0.1F ceramic capacitor as close to the device as possible.
VCRS_F , VCRS_L D+
Figure 2. Timing of VP and VM to D+ and D-
External Components
External Resistors Proper USB operation requires two external resistors, each 27 1%, 1/8W (or greater). Install one resistor in series between D+ of the MAX3453E-MAX3456E and D+ on the USB connector. Install the other resistor in series between D- of the MAX3453E-MAX3456E and Don the USB connector (see Typical Operating Circuit). The MAX3455E/MAX3456E require an external 1.5k pullup resistor between VTRM and D+ or D- to set the bus speed. External Capacitors The MAX3453E-MAX3456E require three external capacitors for proper operation. Bypass VL to GND with a 0.1F ceramic capacitor. Bypass VBUS to GND with a 0.1F ceramic capacitor. Bypass VTRM to GND with a 1F (min) ceramic capacitor. Install all capacitors as close to the device as possible.
Data Transfer
Transmitting Data to the USB The MAX3453E-MAX3456E transmit data to the USB differentially on D+ and D-. VP and VM serve as differential input signals to the driver (Tables 3a and 3b). Receiving Data from the USB To receive data from the USB, drive OE high and SUS low. Differential data received by D+ and D- appears as a differential logic signal at RCV. Single-ended receivers on D+ and D- drive VP and VM, respectively (Tables 4a and 4b).
12
______________________________________________________________________________________
15kV ESD-Protected USB Transceivers MAX3453E-MAX3456E
VL
+3V
VL DUT VP/VM D+/D-
150
560 +3V DUT VP/VM D+/D560
150
OE OE VP/VM CONNECTED TO GND, D+/D- CONNECTED TO PULLUP D+/DVP/VM tPLZ_DRV tPZL_DRV tPLZ_SE tPZL_SE
D+/D- CONNECTED TO GND, VP/VM CONNECTED TO PULLUP
OE
VP/VM CONNECTED TO VL, D+/D- CONNECTED TO PULLDOWN
OE
D+/D- CONNECTED TO +3V, VP/VM CONNECTED TO PULLDOWN
D+/D-
VP/VM
tPHZ_DRV
tPZH_DRV
tPHZ_SE
tPZH_SE
Figure 3. Enable and Disable Timing, Driver
Figure 5. Enable and Disable Timing, Receiver
+3V
INPUT RISE/FALL TIME < 4ns
D+/D0V
MAX3453E- MAX3456E
RCV, VM, AND VP (a) LOAD FOR RCV, VM, AND VP
TEST POINT
CL
VL tPLH_RCV, tPLH_SE tPHL_RCV, tPHL_SE
MAX3453E- MAX3456E
D+ AND D-
27
TEST POINT
CL 15k (b) LOAD FOR D+/DRCV, VM, AND VP
Figure 4. Timing of D+ and D- to RCV, VM, and VP
Figure 6. Test Circuits 13
______________________________________________________________________________________
15kV ESD-Protected USB Transceivers MAX3453E-MAX3456E
ESD Protection
D+ and D- possess extra protection against static electricity to protect the devices up to 15kV. The ESD structures withstand high ESD in all operating modes: normal operation, suspend mode, and powered down. D+ and D- provide protection to the following limits: * 15kV using the Human Body Model * 8kV using the Contact Discharge method specified in IEC 1000-4-2
RC 1M CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE RD 1.5k DISCHARGE RESISTANCE DEVICE UNDER TEST
Cs 100pF
STORAGE CAPACITOR
ESD Test Conditions
ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results.
Figure 7. Human Body ESD Test Models
Human Body Model
Figure 7 shows the Human Body Model and Figure 8 shows the current waveform generated when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which then discharges into the test device through a 1.5k resistor.
IP 100% 90% AMPERES 36.8% 10% 0 0 tRL TIME tDL CURRENT WAVEFORM Ir PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE)
IEC 1000-4-2
The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment. It does not specifically refer to integrated circuits. The major difference between tests done using the Human Body Model and IEC 1000-4-2 is a higher peak current in IEC 1000-4-2, due to lower series resistance. Hence, the ESD withstand voltage measured to IEC 1000-4-2 generally is lower than that measured using the Human Body Model. Figure 9 shows the IEC 1000-4-2 model. The Contact Discharge method connects the probe to the device before the probe is charged.
Figure 8. Human Body Model Current Waveform
RC 50 to 100 CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE
RD 330 DISCHARGE RESISTANCE DEVICE UNDER TEST
Machine Model
The Machine Model for ESD tests all connections using a 200pF storage capacitor and zero discharge resistance. Its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufacturing. All pins require this protection during manufacturing, not just inputs and outputs. After PC board assembly, the Machine Model is less relevant to I/O ports.
Cs 150pF STORAGE CAPACITOR
Figure 9. IEC 1000-4-2 ESD Test Model
Chip Information
TRANSISTOR COUNT: 873 PROCESS: BiCMOS
14
______________________________________________________________________________________
15kV ESD-Protected USB Transceivers
Typical Operating Circuits
+1.65V TO +3.6V 0.1F VL(I/O) VL 0.1F PC BD* VP VM ASIC RCV ENUM SUS SPD** OE GND VTRM 1F VBUS 27 1% D+ 27 1% USB POWER D+ DGND USB CABLE 15k 15k
MAX3453E-MAX3456E
MAX3453E MAX3454E
DGND
*MAX3453E ONLY. **MAX3454E ONLY.
+1.65V TO +3.6V 0.1F VL(I/O) VL VP VM RCV ASIC BD** SUS SPD OE GND 0.1F PC VBUS VTRM 1F USB POWER
MAX3455E MAX3456E*
D+
1.5k*** 27 1% D+ 27 1% DGND USB CABLE 15k 15k
DGND
*PIN COMPATIBLE WITH MICREL MIC2550A. **MAX3455E ONLY. ***CONNECT TO D+ FOR FULL-SPEED OPERATION. CONNECT TO D- FOR LOW-SPEED OPERATION.
______________________________________________________________________________________
15
15kV ESD-Protected USB Transceivers MAX3453E-MAX3456E
Pin Configurations
TOP VIEW
VL ENUM RCV VP VM N.C. GND 1 2 3 4 5 6 7 14 VBUS 13 BD VL 1 SPD 2 RCV 3 VP 4 VM 5 N.C. 6 GND 7 14 VBUS 13 N.C. (ENUM*) (BD**)
MAX3453E
12 VTRM 11 D+ 10 D9 8 OE SUS
MAX3454E MAX3455E MAX3456E
12 VTRM 11 D+ 10 D9 OE 8 SUS
TSSOP
TSSOP
N.C. (ENUM*) (BD**) 13 12 VTRM 11 D+ 10 D***EXPOSED PADDLE 9 OE VM 4 5 N.C. 6 GND 7 SUS 8 N.C. 9 OE
VBUS
16
15
14
13
16
15
14
ENUM RCV VP VM
1 2 3 ***EXPOSED PADDLE 4 5 N.C. 6 GND 7 SUS 8 N.C.
12 VTRM
SPD RCV VP
1 2 3
MAX3453E
11 D+ 10 D-
MAX3454E MAX3455E MAX3456E
3mm x 3mm THIN QFN
*MAX3454E ONLY. **MAX3455E ONLY. ***CONNECT EXPOSED PADDLE TO GND OR LEAVE FLOATING.
3mm x 3mm THIN QFN
16
______________________________________________________________________________________
VBUS
N.C.
N.C.
BD
VL
VL
15kV ESD-Protected USB Transceivers
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 12x16L QFN THIN.EPS
MAX3453E-MAX3456E
D2 b
0.10 M C A B
D D/2
D2/2
E/2
E2/2
C L
E
(NE - 1) X e
E2
L
C L
e
k (ND - 1) X e
C L
0.10 C 0.08 C A A2 A1 L
C L
L
e
e
PACKAGE OUTLINE 12, 16L, THIN QFN, 3x3x0.8mm
21-0136
E
1
2
______________________________________________________________________________________
17
15kV ESD-Protected USB Transceivers MAX3453E-MAX3456E
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
PKG REF. A b D E e L N ND NE A1 A2 k 0 MIN. 0.70 0.20 2.90 2.90 0.45
12L 3x3 NOM. 0.75 0.25 3.00 3.00 0.50 BSC. 0.55 12 3 3 0.02 0.05 0 0.25 0.20 REF 0.25 0.65 0.30 MAX. 0.80 0.30 3.10 3.10 MIN. 0.70 0.20 2.90 2.90
16L 3x3 NOM. 0.75 0.25 3.00 3.00 0.50 BSC. 0.40 16 4 4 0.02 0.20 REF 0.05 0.50 MAX. 0.80 0.30 3.10 3.10 PKG. CODES T1233-1 T1233-3 T1633-1 T1633-2 T1633F-3 T1633-4
EXPOSED PAD VARIATIONS
D2 MIN. 0.95 0.95 0.95 0.95 0.65 0.95 NOM. 1.10 1.10 1.10 1.10 0.80 1.10 MAX. 1.25 1.25 1.25 1.25 0.95 1.25 MIN. 0.95 0.95 0.95 0.95 0.65 0.95 E2 NOM. MAX. 1.10 1.10 1.10 1.10 0.80 1.10 1.25 1.25 1.25 1.25 0.95 1.25 PIN ID 0.35 x 45 0.35 x 45 0.35 x 45 0.35 x 45 JEDEC WEED-1 WEED-1 WEED-2 WEED-2
DOWN BONDS ALLOWED
NO YES NO YES N/A NO
0.225 x 45 WEED-2 0.35 x 45 WEED-2
NOTES: 1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994. 2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES. 3. N IS THE TOTAL NUMBER OF TERMINALS. 4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE. 5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm FROM TERMINAL TIP. 6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY. 7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION. 8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS. 9. DRAWING CONFORMS TO JEDEC MO220 REVISION C.
PACKAGE OUTLINE 12, 16L, THIN QFN, 3x3x0.8mm
21-0136
E
2
2
18
______________________________________________________________________________________
15kV ESD-Protected USB Transceivers
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
MAX3453E-MAX3456E
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19 (c) 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
TSSOP4.40mm.EPS

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