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SN75C185

LOW-POWER MULTIPLE DRIVERS AND RECEIVERS

SLLS065F – AUGUST 1989 – REVISED JANUARY 2000

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Meets or Exceeds the Requirements of

TIA/EIA-232-F and ITU Recommendation

V.28

Single Chip With Easy Interface Between

UART and Serial-Port Connector

Less Than 9-mW Power Consumption

Wide Driver Supply Voltage . . . 4.5 V to

13.2 V

Driver Output Slew Rate Limited to

30 V/µs Max

Receiver Input Hysteresis ...1100 mV Typ

Push-Pull Receiver Outputs

On-Chip Receiver 1-µs Noise Filter

Functionally Interchangeable With Texas

Instruments SN75185

Operates Up to 120 kbit/s Over a 3-Meter

Cable (See

Application Information

for

Conditions)

description

The SN75C185 is a low-power BiMOS device containing three independent drivers and five receivers that are

used to interface data terminal equipment (DTE) with data circuit-terminating equipment (DCE). Typically, the

SN75C185 replaces one SN75188 and two SN75189 devices. This device conforms to TIA/EIA-232-F. The

drivers and receivers of the SN75C185 are similar to those of the SN75C188 and SN75C189A, respectively.

The drivers have a controlled output slew rate that is limited to a maximum of 30 V/µs, and the receivers have

filters that reject input noise pulses that are shorter than 1 µs. Both these features eliminate the need for external

components.

The SN75C185 uses the low-power BiMOS technology. In most applications, the receivers contained in this

device interface to single inputs of peripheral devices such as ACEs, UARTS, or microprocessors. By using

sampling, such peripheral devices usually are insensitive to the transition times of the input signals. If this is not

the case, or for other uses, it is recommended that the SN75C185 receiver outputs be buffered by single Schmitt

input gates or single gates of the HCMOS, ALS, or 74F logic families.

The SN75C185 is characterized for operation from 0°C to 70°C.

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.

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.

RA1

RA2

RA3

DY1

DY2

RA4

DY3

RA5

RY1

RY2

RY3

DA1

DA2

RY4

DA3

RY5

GND

DW OR N PACKAGE

(TOP VIEW)

Summary of content (16 pages)

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SN75C185 LOW-POWER MULTIPLE DRIVERS AND RECEIVERS SLLS065F – AUGUST 1989 – REVISED JANUARY 2000 D D D D D D D D D D Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU Recommendation V.28 Single Chip With Easy Interface Between UART and Serial-Port Connector Less Than 9-mW Power Consumption Wide Driver Supply Voltage . . . 4.5 V to 13.2 V Driver Output Slew Rate Limited to 30 V/µs Max Receiver Input Hysteresis . . .
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SN75C185 LOW-POWER MULTIPLE DRIVERS AND RECEIVERS SLLS065F – AUGUST 1989 – REVISED JANUARY 2000 logic symbol† RA1 RA2 RA3 DY1 DY2 RA4 DY3 RA5 logic diagram (positive logic) 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 RY1 RY1 RA2 RY2 RA3 RY3 DY1 DA1 DY2 DA2 RA4 RY4 DY3 DA3 RA5 RY5 RY2 RY3 DA1 DA2 RY4 DA3 RY5 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
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SN75C185 LOW-POWER MULTIPLE DRIVERS AND RECEIVERS SLLS065F – AUGUST 1989 – REVISED JANUARY 2000 equivalent schematics of inputs and outputs EQUIVALENT DRIVER INPUT EQUIVALENT DRIVER OUTPUT VDD VDD Input DA Internal 1.4-V Ref to GND 160 Ω 74 Ω Output DY GND GND VSS 72 Ω VSS EQUIVALENT RECEIVER INPUT EQUIVALENT RECEIVER OUTPUT VCC Input RA 3.4 kΩ ESD Protection ESD Protection 1.5 kΩ Output RY 530 kΩ GND GND All resistor values are nominal.
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SN75C185 LOW-POWER MULTIPLE DRIVERS AND RECEIVERS SLLS065F – AUGUST 1989 – REVISED JANUARY 2000 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VDD (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.5 V Supply voltage, VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 13.
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SN75C185 LOW-POWER MULTIPLE DRIVERS AND RECEIVERS SLLS065F – AUGUST 1989 – REVISED JANUARY 2000 DRIVER SECTION electrical characteristics over operating free-air temperature range, VDD = 12 V, VSS = –12 V, VCC = 5 V ± 10% (unless otherwise noted) PARAMETER TEST CONDITIONS MIN VDD = 5 V, VDD = 12 V VSS = – 5 V VSS = – 12 V VDD = 5 V, VDD = 12 V VSS = – 5 V VSS = – 12 V TYP† 4 4.5 10 10.8 MAX UNIT VOH High level output voltage High-level VIL = 0.
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SN75C185 LOW-POWER MULTIPLE DRIVERS AND RECEIVERS SLLS065F – AUGUST 1989 – REVISED JANUARY 2000 RECEIVER SECTION electrical characteristics over operating free-air temperature range, VDD = 12 V, VSS = –12 V, VCC = 5 V ± 10% (unless otherwise noted) MIN TYP† MAX UNIT See Figure 5 1.6 2.1 2.55 V See Figure 5 0.65 1 1.
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SN75C185 LOW-POWER MULTIPLE DRIVERS AND RECEIVERS SLLS065F – AUGUST 1989 – REVISED JANUARY 2000 PARAMETER MEASUREMENT INFORMATION IOS(L) VDD or GND – IOS(H) VSS or GND VI VO RL = 3 kΩ (for VOH and VOL tests only) Figure 1. Driver Test Circuit for VOH, VOL, IOS(H), and IOS(L) IIH VI – IIL VI Figure 2. Driver Test Circuit for IIH and IIL 3V Input 1.5 V 1.
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SN75C185 LOW-POWER MULTIPLE DRIVERS AND RECEIVERS SLLS065F – AUGUST 1989 – REVISED JANUARY 2000 PARAMETER MEASUREMENT INFORMATION – IOS(H) IOS(L) VI Figure 4. Receiver Test Circuit for IOS(H) and IOS(L) – IOH VIT, VI VOH VOL IOL Figure 5. Receiver Test Circuit for VIT, VOH, and VOL 4V Input 50% 50% Input Pulse Generator (See Note B) 0V t PHL Output RL CL (see Note A) 90% Output 50% 10% t PLH 50% 10% t THL TEST CIRCUIT VOLTAGE WAVEFORMS Figure 6.
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SN75C185 LOW-POWER MULTIPLE DRIVERS AND RECEIVERS SLLS065F – AUGUST 1989 – REVISED JANUARY 2000 APPLICATION INFORMATION – 12 V TL16C450 ACE 11 RI 43 12 DTR 37 13 CTS 40 14 SO 13 15 RTS 36 16 SI 11 17 DSR 41 18 DCD 42 19 20 GND VSS RY5 RA5 DA3 DY3 RY4 RA4 DA2 DY2 SN75C185 DA1 DY1 RY3 RA3 RY2 RA2 RY1 RA1 VCC VDD 10 5 9 9 R1 8 DTR 7 CTS 6 TX 5 RTS 4 RX 3 DSR 2 DCD 1 TIA/EIA-232-F DB9S Connector 6 1 12 V 5V Figure 7.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 3-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device SN75C185DWR Package Package Pins Type Drawing SOIC DW 20 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2000 330.0 24.4 Pack Materials-Page 1 10.8 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 13.3 2.7 12.0 24.
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PACKAGE MATERIALS INFORMATION www.ti.com 3-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN75C185DWR SOIC DW 20 2000 367.0 367.0 45.
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