STK20C04 Simtek Corporation, STK20C04 Datasheet - Page 7

• Manufacturer Part Number: STK20C04
• Description: Density = 4K ;; Format = 512 X 8 ;; # of Pins = 28 ;; Access Time (ns MAX) = 25,35,45 ;; Initiated Store = Hardware ;; Production = Now ;; Volt = 5 ;; Temps Commercial Industrial Military = C/i
• Manufacturer: Simtek Corporation

RECALL CYCLES #1, #2 & #3
Note p: Measured with W and NE both high, and G and E low.
Note q: Once t
Note r:
RECALL CYCLE #1: NE Controlled
RECALL CYCLE #2: E Controlled
DQ (DATA OUT)
RECALL CYCLE #3: G Controlled
DQ (DATA OUT)
September 2003
DQ (DATA OUT)
NO.
33
34
35
36
37
38
39
40
the RECALL initiation cycle.
If W is low at any point in which both E and NE are low and G is high, then a STORE cycle will be initiated instead of a RECALL.
t
t
t
t
t
t
t
NLQX
NLNH
GLNL
WHNL
ELNL
NLQZ
RESTORE
NE
NE
NE
W
W
W
G
G
G
E
E
E
#1
p
q
NLNH
has been satisfied by NE, G, W and E, the RECALL cycle is completed automatically. Any of NE, G or E may be used to terminate
SYMBOLS
t
t
t
t
t
t
ELQXR
ELNHR
NLEL
GLEL
WHEL
GLEL
#2
t
ELNL
38
t
t
t
t
t
GLQXR
GLNH
NLGL
WHGL
ELGL
t
WHNL
HIGH IMPEDANCE
HIGH IMPEDANCE
37
#3
t
t
ELGL
GLEL
t
36
38
GLNL
t
t
36
WHGL
WHEL
37
37
t
t
NLGL
NLEL
35
35
RECALL Cycle Time
RECALL Initiation Cycle Time
NE Set-up
Output Enable Set-up
Write Enable Set-up
Chip Enable Set-up
NE Fall to Outputs Inactive
Power-up RECALL Duration
n
n, r
n
t
NLQZ
39
7
PARAMETER
t
NLNH
34
Document Control # ML0001 rev 0.1
t
ELNHR
t
GLNH
34
34
HIGH IMPEDANCE
t
NLQX
33
t
t
GLQXR
ELQXR
33
33
(V
CC
MIN
20
0
0
0
0
= 5.0V
STK20C04
MAX
550
20
20
10%)
UNITS
ns
ns
ns
ns
ns
ns
s
s