View ISL4348505_719642.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

(R)
ISL43485
Data Sheet March 15, 2005 FN6071.1
3.3V, Low Power, 30Mbps, RS-485/RS-422 Transceiver
The Intersil ISL43485 is a high speed BiCMOS 3.3V powered, single transceiver that meets both the RS-485 and RS-422 standards for balanced communication. Unlike some competitive devices, this Intersil transceiver is specified for 10% tolerance supplies (3V to 3.6V). Data rates up to 30Mbps are achievable by using this transceiver, which features higher slew rates. Logic inputs (e.g., DI and DE) accept signals in excess of 5.5V, making them compatible with 5V logic families. Receiver (Rx) inputs feature a "fail-safe if open" design, which ensures a logic high output if Rx inputs are floating, and the ISL43485 presents a "single unit load" to the RS-485 bus, which allows up to 32 transceivers on the network. Driver (Tx) outputs are short circuit protected, even for voltages exceeding the power supply voltage. Additionally, on-chip thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation becomes excessive.
Features
* High Data Rate. . . . . . . . . . . . . . . . . . . . . . up to 30Mbps * Operates from a Single +3.3V Supply (10% Tolerance) * Interoperable with 5V Logic * Single Unit Load Allows up to 32 Devices on the Bus * Low Current Shutdown Mode. . . . . . . . . . . . . . . . . . 15nA * -7V to +12V Common Mode Input Voltage Range * Three State Rx and Tx Outputs * 10ns Propagation Delay, 1ns Skew * Half Duplex Pinout * Current Limiting and Thermal Shutdown for driver Overload Protection * Pb-Free Available (RoHS Compliant)
Applications
* SCSI "Fast 20" Drivers and Receivers * Factory Automation * Data Loggers * Security Networks
Pinout
ISL43485 (SOIC) TOP VIEW
RO 1 RE 2 DE 3 DI 4 D 8 7 6 5 VCC B/Z A/Y GND
* Building Environmental Control Systems * Industrial/Process Control Networks * Level Translators
R
Ordering Information
PART NO. (BRAND) ISL43485IB (43485IB) ISL43485IBZ (43485IB) (Note) ISL43485IB-T (43485IB) ISL43485IBZ-T (43485IB) (Note) TEMP. RANGE (C) -40 to 85 -40 to 85 -40 to 85 -40 to 85 PACKAGE 8 Ld SOIC 8 Ld SOIC (Pb-free) 8 Ld SOIC Tape and Reel PKG. DWG. # M8.15 M8.15 M8.15
8 Ld SOIC M8.15 Tape and Reel (Pb-free)
NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright (c) Intersil Americas Inc. 2004, 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
ISL43485 Truth Tables
TRANSMITTING INPUTS RE X X 0 1 DE 1 1 0 0 DI 1 0 X X Z 0 1 High-Z High-Z * OUTPUTS Y 1 0 High-Z High-Z * RE 0 0 0 1 1 INPUTS DE 0 0 0 0 1 A-B +0.2V -0.2V Inputs Open X X RECEIVING OUTPUT RO 1 0 1 High-Z * High-Z
NOTE: *Shutdown Mode
NOTE: *Shutdown Mode
Pin Descriptions
PIN RO RE DE DI GND A/Y B/Z VCC FUNCTION Receiver output: If A > B by at least 0.2V, RO is high; If A < B by 0.2V or more, RO is low; RO = High if A and B are unconnected (floating). Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low. Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low. Ground connection. Noninverting receiver input and noninverting driver output. Pin is an input if DE = 0; pin is an output if DE = 1. Inverting receiver input and inverting driver output. Pin is an input if DE = 0; pin is an output if DE = 1. System power supply input (3V to 3.6V).
Typical Operating Circuit
ISL43485
+3.3V + 8 VCC 1 RO 2 RE 3 DE 4 DI D GND 5 GND 5 R B/Z A/Y 7 6 RT RT 7 6 B/Z A/Y R 0.1F 0.1F + 8 VCC D DI 4 DE 3 RE 2 RO 1 +3.3V
2
FN6071.1 March 15, 2005
ISL43485
Absolute Maximum Ratings
VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Input Voltages DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +7V Input/Output Voltages A/Y, B/Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +12.5V RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (VCC +0.5V) Short Circuit Duration Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
Thermal Information
Thermal Resistance (Typical, Note 1)
JA (C/W)
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . 170 Maximum Junction Temperature (Plastic Package) . . . . . . . . 150C Maximum Storage Temperature Range . . . . . . . . . . . -65C to 150C Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300C (Lead Tips Only)
Operating Conditions
Temperature Range ISL43485I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40C to 85C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE: 1. JA is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
Test Conditions: VCC = 3V to 3.6V; Unless Otherwise Specified. Typicals are at VCC = 3.3V, TA = 25C, Note 2 SYMBOL TEST CONDITIONS TEMP (C) MIN TYP MAX UNITS
PARAMETER DC CHARACTERISTICS Driver Differential VOUT (no load) Driver Differential VOUT (with load)
VOD1 VOD2 RL = 100 (RS-422) (Figure 1A) RL = 54 (RS-485) (Figure 1A) RL = 60, -7V VCM 12V (Figure 1B)
Full Full Full Full Full
2 1.5 1.5 -
2.7 2.3 2.6 0.01
VCC VCC 0.2
V V V V V
Change in Magnitude of Driver Differential VOUT for Complementary Output States Driver Common-Mode VOUT Change in Magnitude of Driver Common-Mode VOUT for Complementary Output States Logic Input High Voltage Logic Input Low Voltage Logic Input Current
VOD
RL = 54 or 100 (Figure 1A)
VOC VOC
RL = 54 or 100 (Figure 1A) RL = 54 or 100 (Figure 1A)
Full Full
-
1.8 0.01
3 0.2
V V
VIH VIL IIN1
DE, DI, RE DE, DI, RE DE, DI RE
Full Full Full Full VIN = 12V VIN = -7V Full Full Full 25 Full Full
2 -2 -25 -0.2 VCC 0.4 -
0.6 -0.3 50 -
0.8 2 25 1 -0.8 0.2 0.4
V V A A mA mA V mV V V
Input Current (A/Y, B/Z)
IIN2
DE = 0V, VCC = 0V or 3.6V
Receiver Differential Threshold Voltage Receiver Input Hysteresis Receiver Output High Voltage Receiver Output Low Voltage
VTH VTH VOH VOL
-7V VCM 12V VCM = 0V IO = -4mA, VID = 200mV IO = -4mA, VID = 200mV
3
FN6071.1 March 15, 2005
ISL43485
Electrical Specifications
Test Conditions: VCC = 3V to 3.6V; Unless Otherwise Specified. Typicals are at VCC = 3.3V, TA = 25C, Note 2 (Continued) SYMBOL IOZR RIN ICC TEST CONDITIONS 0.4V VO 2.4V -7V VCM 12V DI = 0V or VCC DE = VCC, RE = 0V or VCC DE = 0V, RE = 0V Shutdown Supply Current Driver Short-Circuit Current, VO = High or Low Receiver Short-Circuit Current ISHDN IOSD1 IOSR DE = 0V, RE = VCC, DI = 0V or VCC DE = VCC, -7V VY or VZ 12V (Note 4) 0V VO VCC TEMP (C) Full Full Full MIN -1 12 TYP 19 0.75 MAX 1 1.2 UNITS A k mA
PARAMETER Three-State (high impedance) Receiver Output Current Receiver Input Resistance No-Load Supply Current (Note 3)
Full Full Full Full
8
0.65 15 -
1 100 250 60
mA nA mA mA
DRIVER SWITCHING CHARACTERISTICS Maximum Data Rate Driver Differential Output Delay Driver Differential Rise or Fall Time Driver Input to Output Delay Driver Output Skew Driver Enable to Output High Driver Enable to Output Low Driver Disable from Output High Driver Disable from Output Low Driver Enable from Shutdown to Output High Driver Enable from Shutdown to Output Low fMAX tDD tR, tF (Figure 2A) RDIFF = 60, CL = 15pF (Figure 2A) RDIFF = 60, CL = 15pF (Figure 2A) Full Full Full Full Full Full Full Full Full Full Full 30 3 3 6 50 10 6 10 1 45 45 60 70 115 115 25 12 22 5 90 90 90 100 150 150 Mbps ns ns ns ns ns ns ns ns ns ns
tPLH, tPHL RL = 27, CL = 15pF (Figure 2C) tSKEW tZH tZL tHZ tLZ RL = 27, CL = 15pF (Figure 2C) RL = 110, CL = 50pF, SW = GND (Figure 3), (Note 5) RL = 110, CL = 50pF, SW = VCC (Figure 3), (Note 5) RL = 110, CL = 50pF, SW = GND (Figure 3) RL = 110, CL = 50pF, SW = VCC (Figure 3)
tZH(SHDN) RL = 110, CL = 50pF, SW = GND (Figure 3), (Notes 7, 8) tZL(SHDN) RL = 110, CL = 50pF, SW = VCC (Figure 3), (Notes 7, 8)
RECEIVER SWITCHING CHARACTERISTICS Maximum Data Rate Receiver Input to Output Delay Receiver Skew | tPLH - tPHL | Receiver Enable to Output High Receiver Enable to Output Low Receiver Disable from Output High Receiver Disable from Output Low fMAX VID 1.5V with tr/tf = 10ns, RO tH & tL 60% tUI (Figure 4) Full Full Full Full Full Full Full 27 25 35 45 2 11 11 7 7 80 12 25 25 20 20 Mbps ns ns ns ns ns ns
tPLH, tPHL (Figure 4) tSKD tZH tZL tHZ tLZ (Figure 4) RL = 1k, CL = 15pF, SW = GND (Figure 5), (Note 6) RL = 1k, CL = 15pF, SW = VCC (Figure 5), (Note 6) RL = 1k, CL = 15pF, SW = GND (Figure 5) RL = 1k, CL = 15pF, SW = VCC (Figure 5)
4
FN6071.1 March 15, 2005
ISL43485
Electrical Specifications
Test Conditions: VCC = 3V to 3.6V; Unless Otherwise Specified. Typicals are at VCC = 3.3V, TA = 25C, Note 2 (Continued) SYMBOL tSHDN (Note 7) TEST CONDITIONS TEMP (C) Full Full Full MIN 80 TYP 190 240 240 MAX 300 400 400 UNITS ns ns ns
PARAMETER Time to Shutdown Receiver Enable from Shutdown to Output High Receiver Enable from Shutdown to Output Low NOTES:
tZH(SHDN) RL = 1k, CL = 15pF, SW = GND (Figure 5), (Notes 7, 9) tZL(SHDN) RL = 1k, CL = 15pF, SW = VCC (Figure 5), (Notes 7, 9)
2. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified. 3. Supply current specification is valid for loaded drivers when DE = 0V. 4. Applies to peak current. See "Typical Performance Curves" for more information. 5. When testing this parameter, keep RE = 0 to prevent the device from entering SHDN. 6. When testing this parameter, the RE signal high time must be short enough (typically <100ns) to prevent the device from entering SHDN. 7. The ISL43485 is put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 80ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 300ns, the parts are guaranteed to have entered shutdown. See "Low-Power Shutdown Mode" section. 8. Keep RE = VCC, and set the DE signal low time >300ns to ensure that the device enters SHDN. 9. Set the RE signal high time >300ns to ensure that the device enters SHDN.
Test Circuits and Waveforms
VCC
DE DI Z D Y VOD
RL/2 VCC
DE DI Z D Y VOD RL = 60
375 VCM -7V TO +12V 375
RL/2
VOC
FIGURE 1A. VOD AND VOC
FIGURE 1B. VOD WITH COMMON MODE LOAD FIGURE 1. DC DRIVER TEST CIRCUITS
5
FN6071.1 March 15, 2005
ISL43485 Test Circuits and Waveforms (Continued)
3V DE DI Z D Y SIGNAL GENERATOR OUT (Y) RDIFF = 60 CL = 15pF CL = 15pF DI tr, tf = 4.5ns 3V 1.5V 1.5V 0V tPLH 50% tPHL VOH 50% VOL
FIGURE 2A. DIFFERENTIAL TEST CIRCUIT
tPHL OUT (Z) 50%
tPLH VOH 50% VOL
OUT 3V DE DI Z D Y SIGNAL GENERATOR CL = 15pF VOH + VOL 2 RL = 27 VOM
tDD DIFF OUT (Y - Z) 50% 10% tR 1.5V SKEW = |tPLH (Y or Z) - tPHL (Z OR Y)| 90%
tDD 90% +VOD 50% 10% tF -VOD
VOM =
FIGURE 2C. SINGLE ENDED TEST CIRCUIT
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2. DRIVER DATA RATE, PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
DE DI SIGNAL GENERATOR Z D Y SW CL = 50pF 110 VCC GND 3V DE NOTE 7 1.5V 1.5V 0V tHZ VOH - 0.25V VOH 0V tZL, tZL(SHDN) NOTE 7 OUT (Y, Z) 50% VOL + 0.25V V OUTPUT LOW
OL
tZH, tZH(SHDN)
PARAMETER tHZ tLZ tZH tZL tZH(SHDN) tZL(SHDN)
OUTPUT Y/Z Y/Z Y/Z Y/Z Y/Z Y/Z
RE X X 0 (Note 5) 0 (Note 5) 1 (Note 8) 1 (Note 8)
DI 1/0 0/1 1/0 0/1 1/0 0/1
SW GND VCC GND VCC GND VCC
NOTE 7 OUT (Y, Z)
OUTPUT HIGH 50%
tLZ VCC
FIGURE 3A. TEST CIRCUIT
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES
6
FN6071.1 March 15, 2005
ISL43485 Test Circuits and Waveforms (Continued)
GND +1.5V RE B A R RO 15pF 3V A 1.5V 1.5V 0V tPLH SIGNAL GENERATOR 50% tPHL VCC RO 50% 0V
FIGURE 4A. TEST CIRCUIT
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. RECEIVER DATA RATE AND PROPAGATION DELAY
RE GND SIGNAL GENERATOR B A R RO 1k SW 15pF VCC GND RE NOTE 7 1.5V 1.5V 0V tZH, tZH(SHDN) NOTE 7 RO tHZ VOH - 0.25V VOH 0V tZL, tZL(SHDN) NOTE 7 RO 1.5V VOL + 0.25V V OUTPUT LOW
OL
3V
PARAMETER tHZ tLZ tZH (Note 6) tZL (Note 6) tZH(SHDN) (Note 9) tZL(SHDN) (Note 9)
DE 0 0 0 0 0 0
A +1.5V -1.5V +1.5V -1.5V +1.5V -1.5V
SW GND VCC GND VCC GND VCC
OUTPUT HIGH 1.5V
tLZ VCC
FIGURE 5A. TEST CIRCUIT
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5. RECEIVER ENABLE AND DISABLE TIMES
Application Information
RS-485 and RS-422 are differential (balanced) data transmission standards for use in long haul or noisy environments. RS-422 is a subset of RS-485, so RS-485 transceivers are also RS-422 compliant. RS-422 is a pointto-multipoint (multidrop) standard, which allows only one driver and up to 10 (assuming one unit load devices) receivers on each bus. RS-485 is a true multipoint standard, which allows up to 32 one unit load devices (any combination of drivers and receivers) on each bus. To allow for multipoint operation, the RS-485 spec requires that drivers must handle bus contention without sustaining any damage. Another important advantage of RS-485 is the extended common mode range (CMR), which specifies that the driver outputs and receiver inputs withstand signals that range from +12V to -7V. RS-422 and RS-485 are intended for runs as long as 4000', so the wide CMR is necessary to handle ground potential differences, as well as voltages induced in the cable by external fields.
Receiver Features
This device utilizes a differential input receiver for maximum noise immunity and common mode rejection. Input sensitivity is 200mV, as required by the RS422 and RS-485 specifications. Receiver input impedance surpasses the RS-422 spec of 4k, and meets the RS-485 "Unit Load" requirement of 12k minimum. Receiver inputs function with common mode voltages as great as +9V/-7V outside the power supplies (i.e., +12V and -7V), making them ideal for long networks where induced voltages are a realistic concern. All the receivers include a "fail-safe if open" function that guarantees a high level receiver output if the receiver inputs are unconnected (floating). The receiver easily meets the data rate supported by the driver, and the receiver output is tri-statable via the active low RE input.
7
FN6071.1 March 15, 2005
ISL43485
Driver Features
The RS-485, RS-422 driver is a differential output device that delivers at least 1.5V across a 54 load (RS-485), and at least 2V across a 100 load (RS-422) even with VCC = 3V. The driver features low propagation delay skew to maximize bit width, and to minimize EMI, and it is tri-statable via the active high DE input. Outputs of the ISL43485 driver are not slew rate limited, so faster output transition times allow data rates of at least 30Mbps.
Built-In Driver Overload Protection
As stated previously, the RS-485 spec requires that drivers survive worst case bus contentions undamaged. The ISL43485 meets this requirement via driver output short circuit current limits, and on-chip thermal shutdown circuitry. The driver output stages incorporate short circuit current limiting circuitry which ensures that the output current never exceeds the RS-485 spec, even at the common mode voltage range extremes. Additionally, it utilizes a foldback circuit which reduces the short circuit current, and thus the power dissipation, whenever the contending voltage exceeds either supply. In the event of a major short circuit condition, this device also includes a thermal shutdown feature that disables the drivers whenever the die temperature becomes excessive. This eliminates the power dissipation, allowing the die to cool. The drivers automatically reenable after the die temperature drops about 15 degrees. If the contention persists, the thermal shutdown/reenable cycle repeats until the fault is cleared. Receivers stay operational during thermal shutdown.
Data Rate, Cables, and Terminations
Twisted pair is the cable of choice for RS-485, RS-422 networks. Twisted pair cables tend to pick up noise and other electromagnetically induced voltages as common mode signals, which are effectively rejected by the differential receivers in this IC. RS-485, RS-422 are intended for network lengths up to 4000', but the maximum system data rate decreases as the transmission length increases. Devices operating at 30Mbps are often limited to lengths of less than one hundred feet. Figure 6 details the ISL43485's 30Mbps performance driving 200' of "CAT5" cable terminated in 120 at both ends. Note that the differential signal delivered to the receiver at the end of the cable (A-B) still exceeds 1.5V peak. Longer cable lengths are possible by reducing the data rate, as shown in Figure 7 for a data rate of 20Mbps. To minimize reflections, proper termination is imperative when using this 30Mbps device. In point-to-point, or point-tomultipoint (single driver on bus) networks, the main cable should be terminated in its characteristic impedance (typically 120) at the end farthest from the driver. In multireceiver applications, stubs connecting receivers to the main cable should be kept as short as possible. Multipoint (multidriver) systems require that the main cable be terminated in its characteristic impedance at both ends. Stubs connecting a transceiver to the main cable should be kept as short as possible.
Low Power Shutdown Mode
This BiCMOS transceiver uses a fraction of the power required by its bipolar counterparts, nevertheless, the ISL43485 includes a shutdown feature that reduces the already low quiescent ICC to a 15nA trickle. They enter shutdown whenever the receiver and driver are simultaneously disabled (RE = VCC and DE = GND) for a period of at least 300ns. Disabling both the driver and the receiver for less than 80ns guarantees that shutdown is not entered. Note that receiver and driver enable times increase when these devices enable from shutdown. Refer to Notes 5-9, at the end of the Electrical Specification table, for more information.
8
FN6071.1 March 15, 2005
ISL43485 Typical Performance Curves
RECEIVER OUTPUT (V) DI = 30Mbps
VCC = 3.3V, TA = 25C; Unless Otherwise Specified
DRIVER INPUT (V) RECEIVER OUTPUT (V) DI = 20Mbps 5 0 5 0 RO DRIVER INPUT (V)
5 0
5 0 RO
RECEIVER INPUT (V)
3 1.5 0 -1.5 -3
RECEIVER INPUT (V)
DRIVER+CABLE DELAY
(~290ns)
3 1.5 0 -1.5 -3
DRIVER+CABLE DELAY
(~425ns)
A-B
A-B
TIME (20ns/DIV)
TIME (20ns/DIV)
FIGURE 6. DRIVER AND RECEIVER WAVEFORMS DRIVING 200 FEET OF CAT5 CABLE (DOUBLE TERMINATED WITH 120)
FIGURE 7. DRIVER AND RECEIVER WAVEFORMS DRIVING 300 FEET OF CAT5 CABLE (DOUBLE TERMINATED WITH 120)
110 DRIVER OUTPUT CURRENT (mA) 100 90 80 70 60 50 40 30 20 10 0 0 0.5 1 1.5 2 2.5 DIFFERENTIAL OUTPUT VOLTAGE (V) 3 3.5 DIFFERENTIAL OUTPUT VOLTAGE (V)
2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2 -40 -25 0 25 50 75 85 RDIFF = 54 RDIFF = 100
TEMPERATURE (C)
FIGURE 8. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT VOLTAGE
160 140 120 100 OUTPUT CURRENT (mA) 80 60 40 20 0 -20 -40 -60 Y OR Z = HIGH Y OR Z = LOW
FIGURE 9. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs TEMPERATURE
800 ISL83483/85, DE = VCC, RE = X 750
ICC (A)
700 ISL83483/85, DE = RE = GND; ISL83491, DE = X, RE = GND; ISL83488/90
650
-80 -100 -120 -7 -6 -4 -2 0 2 4 6 OUTPUT VOLTAGE (V) 8 10 12 600 -40 -25 0 25 50 75 85
TEMPERATURE (C)
FIGURE 10. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT VOLTAGE
FIGURE 11. SUPPLY CURRENT vs TEMPERATURE
9
FN6071.1 March 15, 2005
ISL43485 Typical Performance Curves
16 RDIFF = 54 15 PROPAGATION DELAY (ns) 14 13 SKEW (ns) 12 11 10 9 8 -40 tPHLY tPHLY 1 tPHLZ -25 0 25 50 75 85 0.5 -40 -25 tPLHY 2.5 2 1.5 tPLHZ 3
VCC = 3.3V, TA = 25C; Unless Otherwise Specified (Continued)
4 3.5 RDIFF = 54 FIGURE 2A |tPHLY - tPLHZ|
|CROSSING PT. OF Y & Z CROSSING PT. OF Y & Z| |tPLHY - tPHLZ| 0 25 TEMPERATURE (C) 50 75 85
TEMPERATURE (C)
FIGURE 12. DRIVER PROPAGATION DELAY vs TEMPERATURE
FIGURE 13. DRIVER SKEW vs TEMPERATURE
DRIVER INPUT (V)
RECEIVER OUTPUT (V)
RECEIVER OUTPUT (V)
RDIFF = 54, CL = 15pF DI
RDIFF = 54, CL = 15pF DI
5 0
5 0
5 0
5 0
RO
RO
DRIVER OUTPUT (V)
DRIVER OUTPUT (V)
3 2.5 2 1.5 1 0.5 0 TIME (10ns/DIV) A/Y B/Z
3 2.5 2 1.5 1 0.5 0 TIME (10ns/DIV) B/Z A/Y
FIGURE 14. DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH
FIGURE 15. DRIVER AND RECEIVER WAVEFORMS, HIGH TO LOW
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 528 PROCESS: Si Gate BiCMOS
10
FN6071.1 March 15, 2005
DRIVER INPUT (V)
ISL43485 Small Outline Plastic Packages (SOIC)
N INDEX AREA E -B1 2 3 SEATING PLANE -AD -CA h x 45o H 0.25(0.010) M BM
M8.15 (JEDEC MS-012-AA ISSUE C)
8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE INCHES SYMBOL A A1 MIN 0.0532 0.0040 0.013 0.0075 0.1890 0.1497 MAX 0.0688 0.0098 0.020 0.0098 0.1968 0.1574 MILLIMETERS MIN 1.35 0.10 0.33 0.19 4.80 3.80 MAX 1.75 0.25 0.51 0.25 5.00 4.00 NOTES 9 3 4 5 6 7 8o Rev. 0 12/93
L
B C D E e
0.050 BSC 0.2284 0.0099 0.016 8 0o 8o 0.2440 0.0196 0.050
1.27 BSC 5.80 0.25 0.40 8 0o 6.20 0.50 1.27

A1 0.10(0.004) C
H h L N
e
B 0.25(0.010) M C AM BS
NOTES: 1. Symbols are defined in the "MO Series Symbol List" in Section 2.2 of Publication Number 95. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 4. Dimension "E" does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per side. 5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area. 6. "L" is the length of terminal for soldering to a substrate. 7. "N" is the number of terminal positions. 8. Terminal numbers are shown for reference only. 9. The lead width "B", as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch). 10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact.
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 11
FN6071.1 March 15, 2005

▲Up To Search▲

Price & Availability of ISL4348505

	To Download ISL4348505 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .