SN74LS259 데이터 시트보기 (PDF) - Motorola => Freescale
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SN74LS259 Datasheet PDF : 6 Pages
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SN54 / 74LS259
AC WAVEFORMS
D
tw
E
tPHL
Q
tw
1.3 V
tPLH
1.3 V
OTHER CONDITIONS: C = H, A = STABLE
Figure 1. Turn-on and Turn-off Delays, Enable To
Output and Enable Pulse Width
D
1.3 V
1.3 V
tPHL
tPLH
Q
1.3 V
1.3 V
OTHER CONDITIONS: E = L, C = H, A = STABLE
Figure 2. Turn-on and Turn-off Delays,
Data to Output
A1
1.3 V
1.3 V
A1
Q1
1.3 V
tPHL
1.3 V
1.3 V
tPLH
1.3 V
OTHER CONDITIONS: E = L, C = L, D = H
Figure 3. Turn-on and Turn-off Delays,
Address to Output
D
th(H)
th(L)
ts(H)
E
ts(L)
1.3 V
Q=D
Q
Q=D
OTHER CONDITIONS: C = H, A = STABLE
Figure 4. Setup and Hold Time, Data to Enable
C
1.3 V
A
STABLE ADDRESS
tPHL
ts
Q
1.3 V
E
OTHER CONDITIONS: E = H
Figure 5. Turn-on Delay, Clear to Output
OTHER CONDITIONS: C = H
Figure 6. Setup Time, Address to Enable
(See Notes 1 and 2)
NOTES:
1. 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.
2. The shaded areas indicate when the inputs are permitted to change for predictable output performance.
FAST AND LS TTL DATA
5-436
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