MC74F259D Просмотр технического описания (PDF) - Motorola => Freescale
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MC74F259D Datasheet PDF : 5 Pages
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MC54/74F259
AC OPERATING REQUIREMENTS
54/74F
54F
74F
TA = +25°C
VCC = +5.0 V
TA = –55 to +125°C
VCC = 5.0 ±10%
TA = 0 to +70 °C
VCC = 5.0 V ±10%
Symbol
Parameter
Min
Max
Min
Max
Min
Max
Unit
ts(H)
Setup Time, HIGH or LOW
4.0
5.0
ts(L)
Dn to E
4.0
5.0
4.0
4.0
ns
th(H)
Hold Time, HIGH or LOW
2.0
2.0
th(L)
Dn to E
2.0
2.0
2.0
2.0
ns
ts(H)
Setup Time, HIGH or LOW
4.0
4.0
ts(L)
A to E(a)
4.0
4.0
4.0
4.0
ns
th(H)
Hold Time, HIGH or LOW
0
0
th(L)
A to E(b)
0
0
0
0
ns
tW
E Pulse Width
4.0
4.0
4.0
ns
tW
MR Pulse Width
4.0
4.0
4.0
ns
a. The Address to Enable setup time is the time before the HIGH-to-LOW Enable transition that the Address must be stable so that the correct latch is addressed
and the other latches are not affected.
b. The Address to Enable hold time is the time after the LOW-to-HIGH Enable transition that the Address must be stable so that the correct latch is addressed and
the other latches are not affected.
FAST AND LS TTL DATA
4-137
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