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M74HCT157C1R View Datasheet(PDF) - STMicroelectronics

Part Name
Description
Manufacturer
M74HCT157C1R Datasheet PDF : 11 Pages
1 2 3 4 5 6 7 8 9 10
M54/M74HCT157 M54/M74HCT158
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
Test Conditions
VCC
(V)
TA = 25 oC
54HC and 74HC
Value
-40 to 85 oC -55 to 125 oC Unit
74HC
54HC
Min. Typ. Max. Min. Max. Min. Max.
tTLH Output Transition 4.5
tTHL Time
8
15
19
22
ns
tPLH Propagation
4.5
tPHL Delay Time
(A, B - Y)
16 25
31
38
ns
tPLH Propagation
4.5
tPHL Delay Time
(SELECT - Y)
19 30
38
45
ns
tPLH Propagation
4.5
tPHL Delay Time
(STROBE - Y)
17 27
34
41
ns
CIN Input Capacitance
5
10
10
10 pF
CPD (*) Power Dissipation
HCT157
50
pF
Capacitance
HCT158
60
pF
(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD VCC fIN + ICC/4 (per channel)
SWITCHING CHARACTERISTICS TEST CIR-
CUIT
TEST CIRCUIT ICC (Opr.)
6/11
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHING CHARACTERISTICS TEST.
 

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