STK12C68-S25 Cypress Semiconductor Corp, STK12C68-S25 Datasheet - Page 5
![](/photos/31/26/312697/42828soic_sml.jpg)
STK12C68-S25
Manufacturer Part Number
STK12C68-S25
Description
Manufacturer
Cypress Semiconductor Corp
Type
NVSRAMr
Datasheet
1.STK12C68-S25.pdf
(21 pages)
Specifications of STK12C68-S25
Word Size
8b
Organization
8Kx8
Density
64Kb
Interface Type
Parallel
Access Time (max)
25ns
Operating Supply Voltage (typ)
5V
Package Type
SOIC
Operating Temperature Classification
Commercial
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4.5V
Operating Temp Range
0C to 70C
Pin Count
28
Mounting
Surface Mount
Supply Current
85mA
Lead Free Status / Rohs Status
Not Compliant
Document Control #ML0008 Rev 2.0
SRAM WRITE CYCLES #1 & #2
Note j:
Note k: E or W must be ≥ V
Note l:
SRAM WRITE CYCLE #1: W Controlled
SRAM WRITE CYCLE #2: E Controlled
NO.
12
13
14
15
16
17
18
19
20
21
ADDRESS
DATA OUT
DATA OUT
ADDRESS
DATA IN
June, 2008
DATA IN
t
If W is low when E goes low, the outputs remain in the high-impedance state.
HSB must be high during SRAM WRITE cycles.
WLQZ
t
t
t
t
t
t
t
t
t
WLWH
DVWH
WHDX
WHQX
ELWH
AVWH
WHAX
AVWL
AVAV
#1
W
E
W
E
i, j
SYMBOLS
t
t
t
t
t
t
t
t
WLEH
ELEH
DVEH
EHDX
AVEH
EHAX
AVAV
AVEL
#2
IH
t
AVWL
18
during address transitions.
t
AVEL
18
PREVIOUS DATA
t
Alt.
t
t
t
t
t
t
t
t
t
WC
WP
CW
DW
AW
WR
WZ
OW
DH
AS
Write Cycle Time
Write Pulse Width
Chip Enable to End of Write
Data Set-up to End of Write
Data Hold after End of Write
Address Set-up to End of Write
Address Set-up to Start of Write
Address Hold after End of Write
Write Enable to Output Disable
Output Active after End of Write
t
WLQZ
PARAMETER
20
t
AVEH
17
t
AVWH
17
STK12C68, STK12C68-5 (SMD5962-94599)
t
WLWH
13
t
ELWH
k, l
14
k, l
t
AVAV
12
t
AVAV
12
5
HIGH IMPEDANCE
t
ELEH
14
t
WLEH
13
STK12C68-5-25
MIN
STK12C68,
25
20
20
10
20
0
0
0
5
HIGH IMPEDANCE
t
DVWH
15
t
DVEH
MAX
15
10
DATA VALID
DATA VALID
STK12C68-5-35
MIN
STK12C68,
35
25
25
12
25
0
0
0
5
MAX
13
t
WHDX
STK12C68-5-45
t
WHAX
16
MIN
19
STK12C68,
45
30
30
15
30
t
t
0
0
0
5
EHAX
EHDX
19
16
(V
t
WHQX
21
CC
MAX
14
= 5.0V ± 10%)
STK12C68-5-55 UNITS
MIN
STK12C68,
55
45
45
25
45
0
0
0
5
MAX
15
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
e