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Part: SN75185DW
Category:
Interface and Interconnect
-> RS-232 (EIA-232)
Description: ti SN75185, Multiple RS-232 Drivers And Receivers
Company: Texas Instruments, Inc.
Datasheet: Download SN75185DW datasheet File size : 255 kB
Request For quote: Find where to buy SN75185DW
Datasheet text preview:
SN75185 MULTIPLE RS 232 DRIVERS AND RECEIVERS
SLLS181C - DECEMBER 1994 - REVISED OCTOBER 2003
D Single Chip With Easy Interface Between D D D D
UART and Serial-Port Connector of IBM PC/AT and Compatibles Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 Standards Supports Data Rates Up To 120 kbit/s ESD Protection Meets or Exceeds 10 kV on RS-232 Pins and 3.5 kV on All Other Pins (Human-Body Model) Pin-to-Pin Compatible With the SN75C185
DB, DW, OR N PACKAGE (TOP VIEW)
description/ordering information
VDD RA1 RA2 RA3 DY1 DY2 RA4 DY3 RA5 VSS
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC RY1 RY2 RY3 DA1 DA2 RY4 DA3 RY5 GND
The SN75185 combines three drivers and five receivers from the TI SN75188 and SN75189 bipolar quadruple drivers and receivers, respectively. The pinout matches the flow-through design of the SN75C185 to decrease the part count, reduce the board space required, and allow easy interconnection of the UART and serial-port connector of IBM PC/AT and compatibles. The bipolar circuits and processing of the SN75185 provide a rugged low-cost solution for this function at the expense of quiescent power and external passive components relative to the SN75C185. The SN75185 complies with the requirements of the TIA/EIA-232-F and ITU v.28 standards. These standards are for data interchange between a host computer and peripheral at signaling rates up to 20 kbit/s. The switching speeds of the SN75185 are fast enough to support rates up to 120 kbit/s with lower capacitive loads (shorter cables). Interoperability at the higher signaling rates cannot be assured unless the designer has design control of the cable and the interface circuits at both ends. For interoperability at signaling rates to 120 kbit/s, use of TIA/EIA-423-B (ITU v.10) and TIA/EIA-422-B (ITU v.11) standards is recommended. The SN75185 is characterized for operation over the temperature range of 0°C to 70°C. ORDERING INFORMATION
TA PDIP (N) 0°C to 70 C 70°C SOIC (DW) SSOP (DB) PACKAGE Tube of 20 Tube of 25 Reel of 2000 Tube of 70 Reel of 2000 ORDERABLE PART NUMBER SN75185N SN75185DW SN75185DWR SN75185DB SN75185DBR A185 SN75185 TOP-SIDE MARKING SN75185N
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. IBM and PC/AT are trademarks of IBM Corporation.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 2003, Texas Instruments Incorporated
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1
SN75185 MULTIPLE RS 232 DRIVERS AND RECEIVERS
SLLS181C - DECEMBER 1994 - REVISED OCTOBER 2003
logic diagram (positive logic)
2 RA1 3 RA2 4 RA3 5 DY1 6 DY2 7 RA4 8 DY3 9 RA5 12 RY5 13 DA3 14 RY4 15 DA2 16 DA1 17 RY3 18 RY2 19 RY1
schematic of drivers
To Other Drivers VDD ESD 11.6 k DAx Input ESD 75.8 4.2 k 9.4 k
320
ESD
DYx Output
GND
To Other Drivers 10.4 k VSS ESD To Other Drivers Resistor values shown are nominal. 3.3 k 68.5
2
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SN75185 MULTIPLE RS 232 DRIVERS AND RECEIVERS
SLLS181C - DECEMBER 1994 - REVISED OCTOBER 2003
schematic (each receiver)
To Other Receivers ESD 9 k 5 k 1.66 k ESD 2 k RYx Output VCC
RAx Input
ESD
3.8 k 10 k GND To Other Receivers
Resistor values shown are nominal.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage (see Note 1): VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 V VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -15 V Input voltage range: Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -15 V to 7 V Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 V to 30 V Driver output voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -15 V to 15 V Receiver low-level output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Package thermal impedance, JA (see Notes 2 and 3): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W DW package . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W Operating virtual junction temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C Electrostatic discharge: Human-Body Model: RS-232 pins, class 3, A (see Note 4) . . . . . . . . . . . . . . . . 10 kV All pins, class 3, A (see Note 5) . . . . . . . . . . . . . . . . . . . . 3.5 kV Machine Model: RS-232 pins, class 3, B (see Note 6) . . . . . . . . . . . . . . . . . . . . 600 V All pins, class 3, B (see Note 4) . . . . . . . . . . . . . . . . . . . . . . . . 250 V Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65°C to 150°C
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 under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. All voltages are with respect to the network ground terminal. 2. Maximum power dissipation is a function of TJ(max), JA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) - TA)/JA. Operating at the absolute maximum TJ of 150°C can affect reliability. 3. The package thermal impedance is calculated in accordance with JESD 51-7. 4. RS-232 pins are tested with respect to ground and to each other. 5. Per MIL-PRF-38535 6. RS-232 pins are tested with respect to ground.
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