HM-6561 データシートの表示（PDF） - Intersil
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HM-6561 Datasheet PDF : 9 Pages
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HM-6561/883
is the minimum write pulse. At the end of the write period, if
W rises before either select the outputs will enable reading
data just written. They will not disable until either select goes
high (TSHQZ).
IF
OBSERVE IGNORE
CASE 1
Both S1 and S2 = Low
Before W = Low
TWLQZ
TWLDV
TDVWH
TWLWH
If a series of consecutive write cycles are to be performed,
W may remain low until all desired locations are written. This
is an extension of Case 2.
Read-Modify-Write cycles and Read-Write-Read cycles can
be performed (extension of Case 1). In fact data may be
modified as many times as desired with E remaining low.
CASE 2
W = Low Before Both
S1 and S2 = Low
TWLWH
TDVWH
TWLQZ
TWLDV
Burn-In Circuit
F6
F5
F4
F3
F8
F9
F10
F0
HM-6561/883
CERDIP
1 A3
2 A2
3 A1
4 A0
5 A5
6 A6
7 A7
8 GND
9E
VCC C1
VCC 18
A4 17
F7
W 16
F1
S1 15
F0
DQ3 14
F2
DQ2 13
F2
DQ1 12
F2
DQ0 11
F2
S2 10
F0
NOTES:
All resistors 47kΩ ±5%.
F0 = 100kHz ±10%.
F1 = F0 ÷ 2, F2 = F1 ÷ 2, F3 = F2 ÷ 2 . . . F12 = F11 ÷ 2.
VCC = 5.5V ±0.5V.
VIH = 4.5V ±10%.
VIL = -0.2V to +0.4V.
C1 = 0.01µF Min.
6-124
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