Texas Instruments SN75LP196PWR, SN75LP196DBR, SN75LP196DW, SN75LP196DWR, SN75LP196N Datasheet

SN75LP196

LOW-POWER MULTIPLE RS-232 DRIVERS AND RECEIVERS

SLLS294A – APRIL 1998 – REVISED JUNE 1999

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D

Single-Chip RS-232 Interface for an
External Modem or Other Computer
Peripheral Serial Port

D

Designed to Transmit and Receive 4-µs
Pulses (Equivalent to 256 kbit/s)

D

Wide Driver Supply-Voltage Range:

4.75 V to 15 V

D

Driver Output Slew Rates Are Controlled
Internally to 30 V/µs Maximum

D

Receiver Input Hysteresis... 1000 mV
T ypical

D

RS-232 Bus-Pin ESD Protection Exceeds
15 kV Using Human-Body Model (HBM)

D

Five Drivers and Three Receivers Meet or
Exceed the Requirements of TIA/EIA-232-F
and ITU v.28 Standards

D

Complements the SN75LP1185

D

Designed to Replace the Industry-Standard
SN75196 With the Same Flow-Through
Pinout

D

Package Options Include Plastic Small
Outline (DW), Shrink Small-Outline (DB),
Thin Shrink Small-Outline (PW), and
Dual-in-Line (N) Packages

description

The SN75LP196 is a low-power bipolar device containing five drivers and three receivers, with 15 kV of ESD
protection on the bus pins with respect to each other. Bus pins are defined as those pins that tie directly to the
serial-port connector, including GND. The pinout matches the flow-through design of the industry-standard
SN75196 and allows easy interconnection of the UART and serial-port connector of the IBM PC/AT and
compatibles. This device provides a rugged, low-cost solution for this function with the combination of bipolar
processing and 15-kV ESD protection.

The SN75LP196 has internal slew-rate control to provide a maximum rate of change in the output signal of
30 V/µs. The driver output swing is clamped nominally at ±6 V to enable the higher data rates associated with
this device and to reduce EMI emissions. Even though the driver outputs are clamped, they can handle voltages
up to ±15 V without damage. All the logic inputs can accept 3.3-V or 5-V input signals.

The SN75LP196 complies with the requirements of the TIA/EIA-232-F and the 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 SN75LP196 support rates up to 256 kbit/s with lower capacitive loads (shorter
cables).

The SN75LP196 is characterized for operation from 0°C to 70°C.

Copyright  1999, Texas Instruments Incorporated

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.

PC/AT is a trademark of IBM Corporation.

DB, DW, N, OR PW PACKAGE

(TOP VIEW)

1
2
3
4
5
6
7
8
9
10

20
19
18
17
16
15
14
13
12
11

V

CC

DA1
DA2
DA3
RY1
RY2
DA4
RY3
DA5

GND

V

DD

DY1
DY2
DY3
RA1
RA2
DY4
RA3
DY5
V

SS

SN75LP196
LOW-POWER MULTIPLE RS-232 DRIVERS AND RECEIVERS

SLLS294A – APRIL 1998 – REVISED JUNE 1999

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Function Tables

DRIVER

INPUT

DA

OUTPUT

DY

H L
L H

Open L

RECEIVER

INPUT

RA

OUTPUT

RY

H L
L H

Open H

logic diagram (positive logic)

2

3

4

5

6

7

8

9

19

18

17

16

15

14

13

12

DA1

DA2

DA3

RY1

RY2

DA4

RY3

DA5

DY1

DY2

DY3

RA1

RA2

DY4

RA3

DY5

SN75LP196

LOW-POWER MULTIPLE RS-232 DRIVERS AND RECEIVERS

SLLS294A – APRIL 1998 – REVISED JUNE 1999

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

†

Positive supply-voltage range (see Note 1): V

CC

–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

V

DD

(see Note 1) –0.5 V to 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . .

Negative supply-voltage range, V

SS

(see Note 1) 0.5 V to –15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input-voltage range, V

I

: Receiver (RA) –30 V to 30 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Driver (DA) –0.5 V to V

CC

+0.4 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output-voltage range, V

O

: Receiver (RY) –0.5 V to 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Driver (DY) –15 V to 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrostatic discharge: Bus pins (human-body model) (see Note 2) Class 3, A: 15 kV. . . . . . . . . . . . . . . . . . .

All pins (human-body model) (see Note 2) Class 3, A: 5 kV. . . . . . . . . . . . . . . . . . . . . .

All pins (machine model) 200 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance, θ

JA

(see Notes 3 and 4): DB package 115°C/W. . . . . . . . . . . . . . . . . . . . . . . . . .

DW package 97°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . .

N package 67°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . .

PW package 128°C/W. . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

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 voltage values are with respect to network ground terminal, unless otherwise noted.

2. Per MIL-STD-883 Method 3015.7

3. Maximum power dissipation is a function of TJ(max),

θ

JA

, and TA. The maximum allowable power dissipation at any allowable

ambient temperature is PD = (TJ(max) – TA)/

θ

JA

. Operating at the absolute maximum TJ of 150°C can impact reliability.

4. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.

recommended operating conditions

MIN NOM MAX UNIT

V

CC

Supply voltage (see Note 5) 4.75 5 5.25 V

V

DD

Supply voltage (see Note 6) 9 12 15 V

V

SS

Supply voltage (see Note 6) –9 –12 –15 V

V

IH

High-level input voltage DA 2 V

V

IL

Low-level input voltage DA 0.8 V

V

I

Receiver input voltage RA –25 25 V

I

OH

High-level output current RY –1 mA

I

OL

Low-level output current RY 2 mA

T

A

Operating free-air temperature 0 70 °C

NOTES: 5. VCC cannot be greater than VDD.

6. The device operates down to VDD = VCC and |VSS| = VCC, but supply currents increase and other parameters may vary slightly from
the data-sheet limits.

SN75LP196
LOW-POWER MULTIPLE RS-232 DRIVERS AND RECEIVERS

SLLS294A – APRIL 1998 – REVISED JUNE 1999

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

supply currents over the recommended operating conditions (unless otherwise noted)

PARAMETER TEST CONDITIONS

MIN TYP MAX UNIT

pp

VDD = 9 V, VSS = –9 V 1000

Supply current for V

CC,

I

CC

VDD = 12 V, VSS = –12 V 1000

µ

A

pp

No load

,

All inputs at

VDD = 9 V, VSS = –9 V 800

Supply current for V

DD,

I

DD

minimum VOH or

VDD = 12 V, VSS = –12 V 800

µ

A

pp

maximum

V

OL

VDD = 9 V, VSS = –9 V –800

Supply current for V

SS,

I

SS

VDD = 12 V, VSS = –12 V –800

µ

A

driver electrical characteristics over the recommended operating conditions (unless otherwise
noted)

PARAMETER TEST CONDITIONS

MIN TYP MAX UNIT

p

VIL = 0.8 V,

VDD = 9 V, VSS = –9 V, See Note 7 5 5.8 6.6

VOHHigh-level output voltage

R

L

= 3 kΩ,

See Figure 1

VDD = 12 V, VSS = –12 V, See Note 8 5 5.8 6.6

V

p

VIH = 2 V,

VDD = 9 V, VSS = –9 V, See Note 7 –5 –5.8 –6.9

VOLLow-level output voltage

R

L

= 3 kΩ,

See Figure 1

VDD = 12 V, VSS = –12 V, See Note 8 –5 –5.8 –6.9

V

I

IH

High-level input current VI at V

CC

1 µA

I

IL

Low-level input current VI at GND –1 µA

I

OS(H)

Short-circuit
high-level output current

VO = GND or VSS, See Figure 2 and Note 9 –30 –55 mA

I

OS(L)

Short-circuit
low-level output current

VO = GND or VDD, See Figure 2 and Note 9 30 55 mA

r

o

Output resistance VDD = VSS = VCC = 0, VO = –2 V to 2 V 300 Ω

NOTES: 7. Minimum RS-232 driver output voltages are not attained with ±5-V supplies. With VDD less than VCC + 2 V , the supply currents may

increase. For RS-232 compliant output swings and minimum power consumption, VDD ≥ VCC + 2 V.

8. Maximum output swing is nominally clamped at ±6 V to enable the higher data rates associated with this device and to reduce EMI
emissions. The driver outputs may slightly exceed the maximum output voltage over the full VCC and temperature ranges.

9. Not more than one output should be shorted at one time.

SN75LP196

LOW-POWER MULTIPLE RS-232 DRIVERS AND RECEIVERS

SLLS294A – APRIL 1998 – REVISED JUNE 1999

5

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

driver switching characteristics over operating free-air temperature range (unless otherwise
noted)

PARAMETER TEST CONDITIONS

MIN TYP MAX UNIT

t

PHL

Propagation delay time,
high- to low-level output

RL = 3 kΩ to 7 kΩ, CL = 15 pF, See Figure 1 300 800 1600 ns

t

PLH

Propagation delay time,
low- to high-level output

RL = 3 kΩ to 7 kΩ, CL = 15 pF, See Figure 1 300 800 1600 ns

VCC = 5 V,

=

Using VTR = 10%-to-90% transition region,
Driver speed = 250 kbit/s, CL = 15 pF

375 2240

t

TLH

Transition time,
low- to high-level output

V

DD

= 12 V,
VSS = –12 V,
RL = 3 kΩ to 7 kΩ,

Using VTR = ±3 V transition region,
Driver speed = 250 kbit/s, CL = 15 pF

200 1500

ns

See Figure 1 and
Note 10

Using VTR = ±3 V transition region,
Driver speed = 125 kbit/s, CL = 2500 pF

2750

VCC = 5 V,

=

Using VTR = 10%-to-90% transition region,
Driver speed = 250 kbit/s, CL = 15 pF

375 2240

t

THL

Transition time,
high- to low-level output

V

DD

= 12 V,
VSS = –12 V,
RL = 3 kΩ to 7 kΩ,

Using VTR = ±3 V transition region,
Driver speed = 250 kbit/s, CL = 15 pF

200 1500

ns

See Figure 1 and
Note 10

Using VTR = ±3 V transition region,
Driver speed = 125 kbit/s, CL = 2500 pF

2750

SR Output slew rate

VCC = 5 V,
VDD = 12 V,
VSS = –12 V,

Using VTR = ±3 V transition region,
Driver speed = 0 to 250 kbit/s, CL = 15 pF

4 20 30 V/µs

NOTE 10: Maximum output swing is limited to ±6 V to enable the higher data rates associated with this device and to reduce EMI emissions.

receiver electrical characteristics over recommended operating free-air temperature range
(unless otherwise noted)

PARAMETER TEST CONDITIONS

MIN TYP MAX UNIT

V

IT+

Positive-going input threshold voltage See Figure 3 1.6 2 2.55 V

V

IT–

Negative-going input threshold voltage See Figure 3 0.6 1 1.45 V

V

HYS

Input hysteresis, V

IT+ VIT–

See Figure 3 750 1000 mV

V

OH

High-level output voltage IOH = –1 mA 2.5 3.9 V

V

OL

Low-level output voltage IOL = 2 mA 0.33 0.5 V

p

VI = 3 V 0.43 0.6 1

IIHHigh-level input current

VI = 25 V 3.6 5.1 8.3

mA

p

VI = 3 V –0.43 –0.6 –1

IILLow-level input current

VI = 25 V –3.6 –5.1 –8.3

mA

I

OS(H)

Short-circuit high-level output current VO = 0, See Figure 5 and Note 9 –20 mA

I

OS(L)

Short-circuit low-level output current VO = VCC, See Figure 5 and Note 9 20 mA

R

IN

Input resistance VI = ±3 V to ±25 V 3 5 7 kΩ

NOTE 9: Not more than one output should be shorted at one time.

SN75LP196
LOW-POWER MULTIPLE RS-232 DRIVERS AND RECEIVERS

SLLS294A – APRIL 1998 – REVISED JUNE 1999

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

receiver switching characteristics over operating free-air temperature range, CL = 50 pF (unless
otherwise noted) (see Figure 4)

PARAMETER

MIN TYP MAX UNIT

t

PHL

Propagation delay time, high- to low-level output 400 900

t

PLH

Propagation delay time, low- to high-level output 400 900

ns

t

TLH

Transition time, low- to high-level output 200 450

t

THL

Transition time, high- to low-level output 200 400

ns

t

sk(p)

Pulse skew |t

PLH

– t

PHL

| 200 425 ns

PARAMETER MEASUREMENT INFORMATION

I

O

I

I

R

L

C

L

V

I

V

O

Inputs Outputs

t

PLH

t

PHL

t

TLH

t

THL

3 V

0 V

V

OH

V

OL

V

I

V

O

50% 50%

50% 50%

V

TR+VTR+

V

TR–

V

TR–

t

w

NOTES: A. The pulse generator has the following characteristics:

For CL < 1000 pF: tw = 4 µs, PRR = 250 kbit/s, ZO = 50 Ω, tr = tf < 50 ns.
For CL = 2500 pF: tw = 8 µs, PRR = 125 kbit/s, ZO = 50 Ω, tr = tf < 50 ns.

B. CL includes probe and jig capacitance.

Figure 1. Driver Parameter Test Circuit and Waveform

I

O

I

I

V

I

V

O

Inputs Outputs

V

DD

V

CC

GND

V

SS

Figure 2. Driver IOS Test

I

O

I

I

V

I

V

O

Inputs Outputs

Figure 3. Receiver VIT Test

SN75LP196

LOW-POWER MULTIPLE RS-232 DRIVERS AND RECEIVERS

SLLS294A – APRIL 1998 – REVISED JUNE 1999

7

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

I

O

I

I

C

L

V

I

V

O

Inputs Outputs

t

PLH

t

PHL

t

TLH

t

THL

4 V

0 V

V

OH

V

OL

V

I

V

O

50% 50%

50% 50%

90% 90%

10% 10%

t

w

NOTES: A. The pulse generator has the following characteristics: tw = 4 µs, PRR = 250 kbit/s, ZO = 50 Ω, tr = tf < 50 ns.

B. CL includes probe and jig capacitance.

Figure 4. Receiver Parameter Test Circuit and Waveform

I

O

I

I

V

I

V

O

Inputs Outputs

V

CC

GND

Figure 5. Receiver IOS Test

APPLICATION INFORMATION

Diodes placed in series with the VDD and VSS leads protect the SN75LP196 in the fault condition in which the device
outputs are shorted to ±15 V and the power supplies are at low voltage and provide low-impedance paths to ground
(see Figure 6).

SN75LP196Output SN75LP196Output

V

DD

V

SS

Figure 6. Power-Supply Protection to Meet Power-Off Fault Conditions of EIA/TIA-232-F

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Copyright  1999, Texas Instruments Incorporated