TL431, A, B

Series

PROGRAMMABLE

PRECISION REFERENCES

Order this document by TL431/D

(Top View)

3

1

Reference

N/C

N/C

N/C

2

4

8

7

6

5 N/C

Anode

N/C

Cathode

Anode

Anode

LP SUFFIX

PLASTIC PACKAGE

CASE 29

(TO–92)

P SUFFIX

PLASTIC PACKAGE

CASE 626

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SOP–8)

Pin 1. Reference

2. Anode

3. Cathode

(Top View)

3

1

Reference

N/C

2

4

8

7

6

5

N/C

Cathode

SOP–8 is an internally modified SO–8 package. Pins 2,

3, 6 and 7 are electrically common to the die attach flag.

This internal lead frame modification decreases power

dissipation capability when appropriately mounted on a

printed circuit board. SOP–8 conforms to all external

dimensions of the standard SO–8 package.

DM SUFFIX

PLASTIC PACKAGE

CASE 846A

(Micro–8)

8

1

8

1

8

1

SEMICONDUCTOR

TECHNICAL DATA

1

2

3

1

MOTOROLA ANALOG IC DEVICE DATA

Programmable

Precision References

The TL431, A, B integrated circuits are three–terminal programmable

shunt regulator diodes. These monolithic IC voltage references operate as a

low temperature coefficient zener which is programmable from Vref to 36 V

with two external resistors. These devices exhibit a wide operating current

range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22

Ω. The

characteristics of these references make them excellent replacements for

zener diodes in many applications such as digital voltmeters, power

supplies, and op amp circuitry. The 2.5 V reference makes it convenient to

obtain a stable reference from 5.0 V logic supplies, and since the TL431, A,

B operates as a shunt regulator, it can be used as either a positive or

negative voltage reference.

Temperature Range

ORDERING INFORMATION

Device

Operating

Temperature Range

Package

TL431CLP, ACLP, BCLP

T0

°

70

°C

TO–92

TL431CP, ACP, BCP

TA =0° to +70°C

Plastic

TL431CDM, ACDM, BCDM

TA = 0° to +70°C

Micro–8

TL431CD, ACD, BCD

SOP–8

TL431ILP, AILP, BILP

T40

°

85

°C

TO–92

TL431IP, AIP, BIP

TA = –40° to +85°C

Plastic

TL431IDM, AIDM, BIDM

TA = –40° to +85°C

Micro–8

TL431ID, AID, BID

SOP–8

© Motorola, Inc. 1998

Rev 6