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參數資料
| 型號： | U632H16SK25G1 |
| 元件分類： | SRAM |
| 英文描述： | 2K X 8 NON-VOLATILE SRAM, 25 ns, PDSO28 |
| 封裝： | 0.300 INCH, GREEN, SOP-28 |
| 文件頁數： | 14/15頁 |
| 文件大小： | 229K |
| 代理商： | U632H16SK25G1 |
8
April 7, 2005
U632H16
p: tPDSTORE approximate td(E)S or td(H)S; tDELAY approximate tdis(H)S.
q: After tw(H)S HSB is hold down internal by STORE operation.
r:
An automatic RECALL also takes place at power up, starting when VCC exceeds VSWITCH and takes tRESTORE. VCC must not drop below
VSWITCH once it has been exceeded for the RECALL to function properly.
s: Once the software controlled STORE or RECALL cycle is initiated, it completes automatically, ignoring all inputs.
t:
Noise on the E pin may trigger multiple READ cycles from the same address and abort the address sequence.
No.
Software Controlled STORE/
RECALL Cycle
Symbol
25
35
45
Unit
Alt.
IEC
Min. Max. Min. Max. Min. Max.
29 STORE/RECALL Initiation Time
tAVAV
tcR
25
35
45
ns
30 Chip Enable to Output Inactives
tELQZ
tdis(E)SR
600
ns
31 STORE Cycle Time
tELQXS
td(E)S
10
ms
32 RECALL Cycle Timer
tELQXR
td(E)R
20
s
33 Address Setup to Chip Enable
tAVELN
tsu(A)SR
00
0
ns
34 Chip Enable Pulse Widths, t
tELEHN
tw(E)SR
20
25
35
ns
35 Chip Disable to Address Change
tEHAXN
th(A)SR
00
0
ns
PowerStore and automatic Power Up RECALL
Hardware Controlled Store
DQi
Output
Previous Data Valid
HSB
ten(H)S
td(H)S
Data Valid
tdis(H)S
tw(H)Sq (28)
(26)
(27)
(25)
High Impedance
VCAP
5.0 V
t
PowerStore
Power Up
VSWITCH
W
DQi
POWER UP
RECALL
BROWN OUT
tRESTORE
BROWN OUT
PowerStore
(NO SRAM WRITES)
RECALL
(24)
NO STORE
tPDSTOREp
tDELAYp
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