L6221AS L6221AD

L6221N

June 2003

QUAD DARLINGTON SWITCH

®

.

FOUR NON INVERTING INPUTS WITH

ENABLE

.

OUTPUT VOLTAGE UP TO 50 V

.

OUTPUT CURRENT UP TO 1.8 A

.

VERY LOW SATURATION VOLTAGE

.

TTL COMPATIBLE INPUTS

.

INTEGRAL FAST RECIRCULATION DIODES

DESCRIPTION

The L6221 monolithic quad darlington switch is de-

signed for high current, high voltage switching appli-

cations. Each of the four switches is controlled by a

logic input and all four are controlled by a common

enable input. All inputs are TTL-compatible for direct

connection to logic circuits.

Each switch consists of an open-collector darlington

transistor plus a fast diode for switching applications

with inductive device loads. The emitters of the four

switches are commoned. Any number of inputs and

outputs of the same device may be paralleled.

Multiwatt 15

Powerdip 12 + 2 + 2

SO16+2+2

ORDERING NUMBERS:

L6221AS (Powerdip)

L6221N (Multiwatt15)

L6221AD (SO16+2+2)

BLOCK DIAGRAM

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