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L6221CSTN/a6avaiQUAD DARLINGTON SWITCH
L6221CDSTN/a100avaiQUAD DARLINGTON SWITCH


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L6221C-L6221CD
QUAD DARLINGTON SWITCH
L6221C 221CN/CD
May 1997
QUAD DARLINGTON SWITCH FOUR NON INVERTING INPUTS WITH
ENABLE. OUTPUT VOLTAGE UP TO 60 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.
Three versions are available : the L6221C mounted
in a Powerdip 12 + 2 + 2 package and the L6221CN
mounted in a 15--lead Multiwatt package, the
L6221CD in SO16+2+2 package.
BLOCK DIAGRAM

1/15
PIN CONNECTIONS (top views)
THERMAL DATA
L6221C-L6221CN-L6221CD

2/15
TRUTH TABLE
For each input : H = High level
L = Low level
X = Don’t care
PIN FUNCTIONS (see block diagram)
ABSOLUTE MAXIMUM RATINGS
L6221C-L6221CN-L6221CD

3/15
ELECTRICAL CHARACTERISTICS Refer to The Test Circuit to Fig.1 to Fig.9 (VS = 5V, Tamb = 25°C unless
otherwise specified)
(*) Only for L6221C - L6221CN types
L6221C-L6221CN-L6221CD

4/15
TEST CIRCUITS
(X) = Referred to Multiwatt package
X = Referred to Powerdip package
Figure 1 : Logic supply current.

Set V IN = 4.5V, V EN = 0.8V, or V IN = 0.8V, V EN = 4.5V, for I S (all outputs off)
Set V IN = 2V, V EN = 2V, for I S (all outputs on)
Figure 2 : Output Sustaining Voltage. Figure 3 : Output Leakage Current.

VP = +60V
L6221C-L6221CN-L6221CD

5/15
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