STK12C68-W45 Cypress Semiconductor Corp, STK12C68-W45 Datasheet - Page 5

• Manufacturer Part Number: STK12C68-W45
• Manufacturer: Cypress Semiconductor Corp
• Type: NVSRAMr

Specifications of STK12C68-W45

• Word Size: 8b
• Organization: 8Kx8
• Density: 64Kb
• Interface Type: Parallel
• Access Time (max): 45ns
• Operating Supply Voltage (typ): 5V
• Package Type: PDIP
• 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: Through Hole
• Supply Current: 65mA
• 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