U635H256 Datasheet, PDF (6/13 Pages) Simtek Corporation – PowerStore 32K x 8 nvSRAM

U635H256
Write Cycle #1: W-controlled^j
Ai
E
W
DQi
Input
DQi
Output
12
t_cW
Address Valid
17
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
t_su(E)
21
AAAAAAAAAAAAAAAAAAAAAAAAAAAA^tAAAA^hAAAA^(AAAAA⁾ AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
16
15_{AAAAAAAAAAAAAAAAAAAAAAAAAAAA}^tsu(A-WH)t
13
w(W)
t_su(A)
19
20
t_su(D)
t_h(D)
Input Data
Valid
22
t_dis(W)
Previous Data
23
t_en(W)
High Impedance
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
Write Cycle #2: E-controlled^j
Ai
15
t_{su(A )}
E
W
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
DQi
Input
DQi
Output
12
t_cW
Address Valid
18
21
t_w(E)
t_h(A)
14
t_su(W)
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
19
t_su(D)
20
t_h(D)
Input Data
Valid
High Impedance
undefined _{AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA}
L- to H-level _{AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA}
H- to L-level _{AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA}
i: If W is low and when E goes low, the outputs remain in the high impedance state.
j: E or W must be V_IH during address transition.
6
December 12, 1997