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19-2671; Rev 0; 10/02
15kV ESD-Protected, 3.3V Quad RS-422 Transmitters
General Description
The MAX3030E-MAX3033E family of quad RS-422 transmitters send digital data transmission signals over twisted-pair balanced lines in accordance with TIA/EIA422-B and ITU-T V.11 standards. All transmitter outputs are protected to 15kV using the Human Body Model. The MAX3030E-MAX3033E are available with either a 2Mbps or 20Mbps guaranteed baud rate. The 2Mbps baud rate transmitters feature slew-rate-limiting to minimize EMI and reduce reflections caused by improperly terminated cables. The 20Mbps baud rate transmitters feature low-static current consumption (ICC < 100A), making them ideal for battery-powered and power-conscious applications. They have a maximum propagation delay of 16ns and a part-to-part skew less than 5ns, making these devices ideal for driving parallel data. The MAX3030E- MAX3033E feature hot-swap capability that eliminates false transitions on the data cable during power-up or hot insertion. The MAX3030E-MAX3033E are low-power, ESD-protected, pin-compatible upgrades to the industry-standard 26LS31 and SN75174. They are available in space-saving 16-pin TSSOP and SO packages.
Features
o Meet TIA/EIA-422-B (RS-422) and ITU-T V.11 Recommendation o 15kV ESD Protection on Tx Outputs o Hot-Swap Functionality o Guaranteed 20Mbps Data Rate (MAX3030E, MAX3032E) o Slew-Rate-Controlled 2Mbps Data Rate (MAX3031E, MAX3033E) o Available in 16-Pin TSSOP and Narrow SO Packages o Low-Power Design (<330W, VCC = 3.3V Static) o +3.3V Operation o Industry-Standard Pinout o Thermal Shutdown
MAX3030E-MAX3033E
Applications
Telecom Backplanes V.11/X.21 Interface Industrial PLCs Motor Control
PART MAX3030ECSE MAX3030ECUE MAX3030EESE MAX3030EEUE MAX3031ECSE
Ordering Information
TEMP RANGE 0C to +70C 0C to +70C -40C to +85C -40C to +85C 0C to +70C 0C to +70C -40C to +85C -40C to +85C 0C to +70C 0C to +70C -40C to +85C -40C to +85C 0C to +70C 0C to +70C -40C to +85C -40C to +85C PIN-PACKAGE 16 SO (Narrow) 16 TSSOP 16 SO (Narrow) 16 TSSOP 16 SO (Narrow) 16 TSSOP 16 SO (Narrow) 16 TSSOP 16 SO (Narrow) 16 TSSOP 16 SO (Narrow) 16 TSSOP 16 SO (Narrow) 16 TSSOP 16 SO (Narrow) 16 TSSOP
Pin Configurations
TOP VIEW
DI1 1 DO1+ 2 DO1- 3 EN 4 DO2- 5 DO2+ 6 DI2 7 GND 8 16 VCC 15 DI4 14 DO4+ DI1 1 DO1+ 2 DO1- 3 EN1&2 4 DO2- 5 DO2+ 6 DI2 7 GND 8 16 VCC 15 DI4 14 DO4+
MAX3031ECUE MAX3031EESE MAX3031EEUE MAX3032ECSE MAX3032ECUE MAX3032EESE MAX3032EEUE MAX3033ECSE MAX3033ECUE MAX3033EESE MAX3033EEUE
MAX3030E/ MAX3031E
13 DO412 EN 11 DO310 DO3+ 9 DI3
MAX3032E/ MAX3033E
13 DO412 EN3&4 11 DO310 DO3+ 9 DI3
TSSOP/SO
TSSOP/SO
________________________________________________________________ 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, 3.3V Quad RS-422 Transmitters MAX3030E-MAX3033E
ABSOLUTE MAXIMUM RATINGS
(All Voltages Are Referenced to Device Ground, Unless Otherwise Noted) VCC ........................................................................................+6V EN1&2, EN3&4, EN, EN............................................-0.3V to +6V DI_ ............................................................................-0.3V to +6V DO_+, DO_- (normal condition) .................-0.3V to (VCC + 0.3V) DO_+, DO_- (power-off or three-state condition).....-0.3V to +6V Driver Output Current per Pin.........................................150mA Continuous Power Dissipation (TA = +70C) 16-Pin SO (derate 8.70mW/C above +70C)..............696mW 16-Pin TSSOP (derate 9.40mW/C above +70C) .......755mW Operating Temperature Ranges MAX303_EC_ ......................................................0C to +70C MAX303_EE_ ...................................................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +160C 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
(3V VCC 3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25C.) (Note 1)
PARAMETER DRIVER OUTPUT: DO_+, DO_VOD1 Differential Driver Output VOD2 VOD3 Change in Differential Output Voltage Driver Common-Mode Output Voltage Change in Common-Mode Voltage Three-State Leakage Current Output Leakage Current Driver Output Short-Circuit Current INPUTS: EN, EN, EN1&2, EN3&4 Input High Voltage Input Low Voltage Input Current Hot-Swap Driver Input Current SUPPLY CURRENT Supply Current THERMAL PROTECTION Thermal-Shutdown Threshold Thermal-Shutdown Hysteresis ESD Protection DO_ Human Body Model TSH 160 10 15 C C kV ICC No load 100 A VIH VIL ILEAK IHOTSWAP EN, EN, EN1&2, EN3&4 (Note 4) 2.0 0.4 2 200 V V A A VOD VOC VOC IOZ IOFF ISC RL = 100, Figure 1 RL = , Figure 1 RL = 3.9k (for compliance with V.11), Figure 1 RL = 100 (Note 2) RL = 100, Figure 1 RL = 100 (Note 2) VOUT = VCC or GND, driver disabled VCC = 0V, VOUT = 3V or 6V VOUT = 0V, VIN = VCC or GND (Note 3) -150 -0.4 -0.4 2.0 3.6 3.6 +0.4 3 +0.4 10 20 V V V A A mA V SYMBOL CONDITIONS MIN TYP MAX UNITS
2
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15kV ESD-Protected, 3.3V Quad RS-422 Transmitters
SWITCHING CHARACTERISTICS--MAX3030E, MAX3032E
(3V VCC 3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25C.)
PARAMETER Driver Propagation Delay Low to High Driver Propagation Delay High to Low Differential Transition Time, Low to High Differential Transition Time, High to Low Differential Skew (Same Channel) |tDPLH - tDPHL| Skew Driver to Driver (Same Device) Skew Part to Part Maximum Data Rate Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High tDZH tDZL tDLZ tDHZ S2 closed, RL = 500, CL = 50pF, Figures 4, 5 S1 closed, RL = 500, CL = 50pF, Figures 4, 5 S1 closed, RL = 500, CL = 50pF, Figures 4, 5 S2 closed, RL = 500, CL = 50pF, Figures 4, 5 SYMBOL tDPLH RL = 100, CL = 50pF, Figures 2, 3 tDPHL tR tF tSK1 RL = 100, CL = 50pF, VCC = 3.3V tSK2 tSK3 RL = 100, CL = 50pF, VCC = 3.3V, TMAX = +5C 20 50 50 50 50 5 ns Mbps ns ns ns ns 2 ns 8 16 ns CONDITIONS MIN TYP MAX UNITS
MAX3030E-MAX3033E
RL = 100, CL = 50pF (10% to 90%), Figures 2, 3
10
ns
SWITCHING CHARACTERISTICS--MAX3031E, MAX3033E
(3V VCC 3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25C.)
PARAMETER Driver Propagation Delay Low to High Driver Propagation Delay High to Low Differential Transition Time, Low to High Differential Transition Time, High to Low Differential Skew (Same Channel) |tDPLH - tDPHL| Skew Driver to Driver (Same Device) SYMBOL tDPLH RL = 100, CL = 50pF, Figures 2, 3 tDPHL tR tF tSK1 RL = 100, CL = 50pF, VCC = 3.3V tSK2 10 ns 40 70 ns CONDITIONS MIN TYP MAX UNITS
RL = 100, CL = 50pF (10% to 90%), Figures 2, 3
15
50
ns
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15kV ESD-Protected, 3.3V Quad RS-422 Transmitters MAX3030E-MAX3033E
SWITCHING CHARACTERISTICS--MAX3031E, MAX3033E (continued)
(3V VCC 3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25C.)
PARAMETER Skew Part to Part Maximum Data Rate Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High tDZH tDZL tDLZ tDHZ S2 closed, RL = 500, CL = 50pF, Figures 4, 5 S1 closed, RL = 500, CL = 50pF, Figures 4, 5 S1 closed, RL = 500, CL = 50pF, Figures 4, 5 S2 closed, RL = 500, CL = 50pF, Figures 4, 5 SYMBOL tSK3 CONDITIONS RL = 100, CL = 50pF, VCC = 3.3V, TMAX = +5C 2 100 100 150 150 MIN TYP MAX 18 UNITS ns Mbps ns ns ns ns
Note 1: All currents into the device are positive; all currents out of the device are negative. All voltages are referenced to device ground, unless otherwise noted. Note 2: VOD and VOC are the changes in VOD and VOC, respectively, when DI changes state. Note 3: Only one output shorted at a time. Note 4: This input current is for the hot-swap enable (EN_, EN, EN) inputs and is present until the first transition only. After the first transition, the input reverts to a standard high-impedance CMOS input with input current ILEAK.
Typical Operating Characteristics
(VCC = +3.3V and TA = +25C, unless otherwise noted.)
DIFFERENTIAL OUTPUT VOLTAGE vs. OUTPUT CURRENT
MAX3030E toc01
OUTPUT CURRENT vs. TRANSMITTER OUTPUT LOW VOLTAGE
MAX3030E toc02
OUTPUT CURRENT vs. TRANSMITTER OUTPUT HIGH VOLTAGE
MAX3030E toc03
4 DIFFERENTIAL OUTPUT VOLTAGE (V)
200
150 125 OUTPUT CURRENT (mA) 100 75 50 25
TA = 0C 2 TA = +85C 1 TA = +25C
OUTPUT CURRENT (mA)
3
150
100
50
0 0 30 60 90 120 OUTPUT CURRENT (mA)
0 0 1 2 3 4 OUTPUT LOW VOLTAGE (V)
0 0 1 2 3 4 OUTPUT HIGH VOLTAGE (V)
4
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15kV ESD-Protected, 3.3V Quad RS-422 Transmitters
Typical Operating Characteristics (continued)
(VCC = +3.3V and TA = +25C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX3030E toc04
MAX3030E-MAX3033E
MAX3030E/MAX3032E SUPPLY CURRENT vs. DATA RATE
MAX3030E toc05
MAX3031E/MAX3033E SUPPLY CURRENT vs. DATA RATE
NO RESISTIVE LOAD, CL = 200pF, ALL FOUR TRANSMITTERS SWITCHING
MAX3030E toc06
100 DRIVERS ENABLED 80 SUPPLY CURRENT (A)
30 25 SUPPLY CURRENT (mA) 20 15 10 5 0 NO RESISTIVE LOAD, CL = 200pF, ALL FOUR TRANSMITTERS SWITCHING
2.5
60 TA = +25C 40 TA = 0C 20
SUPPLY CURRENT (mA)
TA = +85C
2.0
1.5
1.0
0.5
0 0 1 2 SUPPLY VOLTAGE (V) 3 4
0 0.1k 1k 10k 100k 1M 10M 100M 0.1k 1k 10k 100k 1M 10M DATA RATE (bps) DATA RATE (bps)
MAX3030E/MAX3032E SUPPLY CURRENT vs. DATA RATE
MAX3030E toc07
MAX3031E/MAX3033E SUPPLY CURRENT vs. DATA RATE
ALL FOUR TRANSMITTERS LOADED AND SWITCHING RL = 100, CL = 200pF
MAX3030E toc08
MAX3030E DRIVER PROPAGATION DELAY (LOW TO HIGH)
MAX3030E toc09
130 ALL FOUR TRANSMITTERS LOADED AND SWITCHING RL = 100, CL = 200pF
100
DI_ 1V/div
120 SUPPLY CURRENT (mA)
110
SUPPLY CURRENT (mA)
97
94
100
DIFFERENTIAL OUTPUT 2V/div
90
91
80 0.1k 1k 10k 100k 1M 10M 100M DATA RATE (bps)
88 0.1k 1k 10k 100k 1M 10M 10ns/div DATA RATE (bps)
MAX3030E DRIVER PROPAGATION DELAY (HIGH TO LOW)
MAX3030E toc10
MAX3031E DRIVER PROPAGATION DELAY (LOW TO HIGH)
MAX3030E toc11
MAX3031E DRIVER PROPAGATION DELAY (HIGH TO LOW)
MAX3030E toc12
DI_ 1V/div DIFFERENTIAL OUTPUT 2V/div
DIFFERENTIAL OUTPUT 2V/div
DIFFERENTIAL OUTPUT 2V/div
DI_ 1V/div 10ns/div 20ns/div 20ns/div
DI_ 1V/div
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15kV ESD-Protected, 3.3V Quad RS-422 Transmitters MAX3030E-MAX3033E
Typical Operating Characteristics (continued)
(VCC = +3.3V and TA = +25C, unless otherwise noted.) ENABLE RESPONSE TIME
MAX3030E toc13
MAX3033E EYE DIAGRAM
MAX3030E toc14
ENABLE 1V/div
DIFFERENTIAL OUTPUT 2V/div
DO_+ 1V/div
DO_1V/div
20ns/div
100ns/div
Pin Description
PIN MAX3030E/ MAX3031E 1, 7, 9, 15 MAX3032E/ MAX3033E 1, 7, 9, 15 NAME FUNCTION Transmitter Inputs. When the corresponding transmitter is enabled, a low on DI_ forces the noninverting output low and inverting output high. Similarly, a high on DI_ forces noninverting output high and inverting output low.
DI1, DI2, DI3, DI4
2, 6, 10, 14 3, 5, 11, 13
2, 6, 10, 14 3, 5, 11, 13
DO1+, DO2+, Noninverting RS-422 Outputs DO3+, DO4+ DO1-, DO2-, DO3-, DO4Inverting RS-422 Outputs Transmitter Enable Input: Active HIGH. Drive EN HIGH to enable all transmitters. When EN is HIGH, drive EN LOW to disable (three-state) all the transmitters. The transmitter outputs are high impedance when disabled. EN is hot-swap protected (see the Hot Swap section). Ground Transmitter Enable Input: Active LOW. Drive EN LOW to enable all transmitters. When EN is LOW, drive EN HIGH to disable all the transmitters. The transmitter outputs are high impedance when disabled. EN is hot-swap protected (see the Hot Swap section). Transmitter Enable Input for Channels 1 and 2. Drive EN1&2 HIGH to enable the corresponding transmitters. Drive EN1&2 LOW to disable the corresponding transmitters. The transmitter outputs are high impedance when disabled. EN1&2 is hotswap protected (see the Hot Swap section). Transmitter Enable Input for Channels 3 and 4. Drive EN3&4 HIGH to enable the corresponding transmitters. Drive EN3&4 LOW to disable the corresponding transmitters. The transmitter outputs are high impedance when disabled. EN3&4 is hotswap protected (see the Hot Swap section). Positive Supply; +3V VCC +3.6V. Bypass VCC to GND with a 0.1F capacitor.
4
--
EN
8 12
8 --
GND EN
--
4
EN1&2
--
12
EN3&4
16
16
VCC
6
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15kV ESD-Protected, 3.3V Quad RS-422 Transmitters
Test Circuits and Timing Diagrams
CL DI_+ RL 2 VOD RL 2 DI_CL DO_VOC DI_ VOD RL CL DO_+
MAX3030E-MAX3033E
Figure 1. Differential Driver DC Test Circuit
Figure 2. Differential Driver Propagation Delay and Transition Time Test Circuit
3V DI 0V 1.5V tDPLH tDPHL 1.5V 1/2 VO RL CL 1/2 VO VO VDIFF 0V -VO VDIFF = V (DO_+) - V (DO_-) 10% tR 90% tF tSKEW = |tDPLH - tDPHL| 90% 10% S2 ENABLE SIGNAL IS ONE OF THE POSSIBLE ENABLE CONFIGURATIONS (SEE TRUTH TABLE). S1 VCC
DO_VO DO_+
OUTPUT UNDER TEST
Figure 3. Differential Driver Propagation Delay and Transition Waveform
Figure 4. Driver Enable/Disable Delays Test Circuit
3V EN 0V tDZL VOL VOH 1.5V 0V tDZH ENABLE SIGNAL IS ONE OF THE POSSIBLE ENABLE CONFIGURATIONS (SEE TRUTH TABLE). tDHZ tDLZ VOL + 0.3V VCC DI GND OUTPUT NORMALLY HIGH VOH - 0.3V DO_DO_+ A A 1.5V 1.5V
1.5V OUTPUT NORMALLY LOW
Figure 5. Driver Enable/Disable Waveform
Figure 6. Short-Circuit Measurements 7
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15kV ESD-Protected, 3.3V Quad RS-422 Transmitters MAX3030E-MAX3033E
Test Circuits and Timing Diagrams (continued)
VCC GND DO_+ DI DO_A A
transmitter outputs of this product family are characterized for protection to 15kV using the Human Body Model. Other ESD test methodologies include IEC10004-2 Contact Discharge and IEC1000-4-2 AirGap Discharge (formerly IEC801-2).
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.
Human Body Model
Figure 7. Power-Off Measurements
Detailed Description
The MAX3030E-MAX3033E are high-speed quad RS422 transmitters designed for digital data transmission over balanced lines. They are designed to meet the requirements of TIA/EIA-422-B and ITU-T V.11. The MAX3030E-MAX3033E are available in two pinouts to be compatible with both the 26LS31 and SN75174 industry-standard devices. Both are offered in 20Mbps and 2Mbps baud rate. All versions feature a low-static current consumption (ICC < 100A) that makes them ideal for battery-powered and power-conscious applications. The 20Mbps version has a maximum propagation delay of 16ns and a part-to-part skew less than 5ns, allowing these devices to drive parallel data. The 2Mbps version is slew-rate-limited to reduce EMI and reduce reflections caused by improperly terminated cables. Outputs have enhanced ESD protection providing 15kV tolerance. All parts feature hot-swap capability that eliminates false transitions on the data cable during power-up or hot insertion.
Figure 8 shows the Human Body Model, and Figure 9 shows the current waveform it generates when discharged into low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5k resistor.
RC 1M CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE
RD 1.5k DISCHARGE RESISTANCE DEVICE UNDER TEST
Cs 100pF
STORAGE CAPACITOR
Figure 8. Human Body ESD Test Model
15kV ESD Protection
As with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. The driver outputs and receiver inputs have extra protection against static electricity. Maxim's engineers developed state-of-the-art structures to protect these pins against ESD of 15kV without damage. The ESD structures withstand high ESD in all states: normal operation and power-down. After an ESD event, the MAX3030E-MAX3033E keep working without latchup. ESD protection can be tested in various ways; the
IP 100% 90% AMPS 36.8% 10% 0 0 tRL TIME
Ir
PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE)
tDL CURRENT WAVEFORM
Figure 9. Human Body Current Waveform
8
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15kV ESD-Protected, 3.3V Quad RS-422 Transmitters
Machine Model
The Machine Model for ESD tests all pins 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. Of course, all pins require this protection during manufacturing, not just inputs and outputs. Therefore, after PC board assembly, the Machine Model is less relevant to I/O ports.
VCC 6s TIMER
MAX3030E-MAX3033E
TIMER
Hot Swap
When circuit boards are plugged into a "hot" backplane, there can be disturbances to the differential signal levels that could be detected by receivers connected to the transmission line. This erroneous data could cause data errors to an RS-422 system. To avoid this, the MAX3030E-MAX3033E have hot-swap capable inputs. When a circuit board is plugged into a "hot" backplane, there is an interval during which the processor is going through its power-up sequence. During this time, the processor's output drivers are high impedance and are unable to drive the enable inputs of the MAX3030E- MAX3033E (EN, EN, EN_) to defined logic levels. Leakage currents from these high-impedance drivers, of as much as 10A, could cause the enable inputs of the MAX3030E-MAX3033E to drift high or low. Additionally, parasitic capacitance of the circuit board could cause capacitive coupling of the enable inputs to either GND or V CC . These factors could cause the enable inputs of the MAX3030E-MAX3033E to drift to levels that may enable the transmitter outputs. To avoid this problem, the hot-swap input provides a method of holding the enable inputs of the MAX3030E-MAX3033E in the disabled state as VCC ramps up. This hot-swap input is able to overcome the leakage currents and parasitic capacitances that can pull the enable inputs to the enabled state.
5.6k EN
DE (HOT SWAP) 100A 2mA M2
M1
Figure 10. Simplified Structure of the Driver Enable Pin (EN)
3.3V VCC DO_+ DI_ (VCC OR GND) DO_1k 0.1k 50pF
1k
Hot-Swap Input Circuitry
In the MAX3030E-MAX3033E, the enable inputs feature hot-swap capability. At the input there are two NMOS devices, M1 and M2 (Figure 10). When VCC is ramping up from zero, an internal 6s timer turns on M2 and sets the SR latch, which also turns on M1. Transistors M2, a 2mA current sink, and M1, a 100A current sink, pull EN to GND through a 5.6k resistor. M2 is designed to pull the EN input to the disabled state against an external parasitic capacitance of up to 100pF that is trying to enable the EN input. After 6s, the timer turns M2 off and M1 remains on, holding the EN input low against threestate output leakages that might enable EN. M1 remains on until an external source overcomes the required input
Figure 11. Differential Power-Up Glitch (Hot Swap)
current. At this time the SR latch resets and M1 turns off. When M1 turns off, EN reverts to a standard, highimpedance CMOS input. Whenever VCC drops below 1V, the hot-swap input is reset. The EN1&2 and EN3&4 input structures are identical to the EN input. For the EN input, there is a complementary circuit employing two PMOS devices pulling the EN input to VCC.
Hot-Swap Line Transient
The circuit of Figure 11 shows a typical offset termination used to guarantee a greater than 200mV offset when a line is not driven. The 50pF capacitor repre9
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15kV ESD-Protected, 3.3V Quad RS-422 Transmitters MAX3030E-MAX3033E
sents the minimum parasitic capacitance that would exist in a typical application. In most cases, more capacitance exists in the system and reduces the magnitude of the glitch. During a "hot-swap" event when the driver is connected to the line and is powered up, the driver must not cause the differential signal to drop below 200mV (Figures 12 and 13). The MAX3032E/MAX3033E are compatible with the SN75174. EN1&2 controls transmitters 1 and 2, and EN 3&4 controls transmitters 3 and 4 (dual enable).
Typical Applications
The MAX3030E-MAX3033E offer optimum performance when used with the MAX3094E/MAX3096 3.3V quad differential line receivers. Figure 14 shows a typical RS422 connection for transmitting and receiving data.
Operation of Enable Pins
The MAX3030E-MAX3033E family has two enable-functional versions. The MAX3030E/MAX3031E are compatible with 26LS31, where the two enable signals control all four transmitters (global enable).
VCC 1V/div
VCC 1V/div
DO_+ - DO_DO_+ DO_4s/div 1.0s/div
DO_+ - DO_DO_+ DO_-
Figure 12. Differential Power-Up Glitch (0.1V/s)
Figure 13. Differential Power-Up Glitch (1V/s)
Table 1. MAX3030E/MAX3031E Transmitter Controls
EN 0 0 1 1 EN 0 1 0 1 TX1 Active High-Z Active Active TX2 Active High-Z Active Active TX3 Active High-Z Active Active TX4 Active High-Z Active Active MODE All transmitters active All transmitters disabled All transmitters active All transmitters active
Table 2. MAX3032E/MAX3033E Transmitter Controls
EN1&2 0 0 1 1 EN3&4 0 1 0 1 TX1 High-Z High-Z Active Active TX2 High-Z High-Z Active Active TX3 High-Z Active High-Z Active TX4 High-Z Active High-Z Active MODE All transmitters disabled Tx 3 and 4 active Tx 1 and 2 active All transmitters active
10
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15kV ESD-Protected, 3.3V Quad RS-422 Transmitters MAX3030E-MAX3033E
MAX3030E/MAX3031E MAX3094
DI1
D1
RT
R1
R1OUT
DI2
D2
RT
R2
R2OUT
DI3
D3
RT
R3
R3OUT
DI4
D4
RT
R4
R4OUT
EN EN
G G
VCC
GND
VCC
GND
Figure 14. Typical Connection of a Quad Transmitter and Quad Receiver as a Pair
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11
15kV ESD-Protected, 3.3V Quad RS-422 Transmitters MAX3030E-MAX3033E
VCC VCC GND GND
EN EN DI1 DO1+ DO1-
EN1&2 EN3&4 DO1+ DO1-
DI1
DI2
DO2+ DO2DI2 DO2+ DO2-
DI3
DO3+ DO3DI3 DO3+ DO3-
DI4
DO4+ DO4DI4 DO4+ DO4-
MAX3030E/MAX3031E MAX3032E/MAX3033E Figure 15. MAX3030E/MAX3031E Functional Diagram Figure 16. MAX3032E/MAX3033E Functional Diagram
Chip Information
TRANSISTOR COUNT: 1050 PROCESS: BiCMOS
12
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15kV ESD-Protected, 3.3V Quad RS-422 Transmitters
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.)
SOICN .EPS
MAX3030E-MAX3033E
INCHES DIM A A1 B C e E H L MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050
MILLIMETERS MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 1.27
N
E
H
VARIATIONS:
1
INCHES
MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC
TOP VIEW
DIM D D D
MIN 0.189 0.337 0.386
MAX 0.197 0.344 0.394
D C
A e B A1
0 -8 L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL DOCUMENT CONTROL NO. REV.
21-0041
B
1 1
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13
15kV ESD-Protected, 3.3V Quad RS-422 Transmitters MAX3030E-MAX3033E
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.)
TSSOP4.40mm.EPS
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.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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