STK20C04-W25 Cypress Semiconductor Corp, STK20C04-W25 Datasheet - Page 4

• Manufacturer Part Number: STK20C04-W25
• Manufacturer: Cypress Semiconductor Corp
• Type: NVSRAMr

Specifications of STK20C04-W25

• Word Size: 8b
• Organization: 512x8
• Density: 4Kb
• Interface Type: Parallel
• Access Time (max): 25ns
• 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: 85mA
• Lead Free Status / Rohs Status: Compliant

March 2006
STK20C04
SRAM WRITE CYCLES #1 & #2
Note i:
Note j:
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
ADDRESS
DATA OUT
DATA IN
t
WLQZ
DATA IN
t
t
t
t
t
t
t
t
t
WLWH
DVWH
WHDX
WHQX
AVWH
WHAX
ELWH
AVWL
AVAV
If W is low when E goes low, the outputs remain in the high-impedance state.
E or W must be ≥ V
#1
W
h, i
E
W
E
SYMBOLS
t
t
t
t
t
t
t
t
WLEH
DVEH
EHDX
ELEH
AVEH
EHAX
AVAV
AVEL
#2
IH
t
AVWL
t
AVEL
18
during address transitions. NE ≥ V
18
t
t
t
t
t
Alt.
t
t
t
t
t
OW
WC
WP
CW
DW
AW
WR
WZ
DH
AS
PREVIOUS DATA
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
t
20
AVEH
17
t
AVWH
17
PARAMETER
t
WLWH
13
IH
t
ELWH
j
.
14
j
t
AVAV
t
12
AVAV
12
HIGH IMPEDANCE
t
4
ELEH
14
t
WLEH
13
HIGH IMPEDANCE
t
DVWH
15
Document Control # ML0001 rev 0.2
t
DVEH
15
DATA VALID
DATA VALID
STK20C04-25
MIN
25
20
20
10
20
0
0
0
5
MAX
10
t
WHDX
t
STK20C04-35
WHAX
16
MIN
35
25
25
12
25
19
0
0
0
5
t
EHDX
t
EHAX
16
19
(V
t
WHQX
21
MAX
13
CC
= 5.0V
STK20C04-45
MIN
45
30
30
15
30
0
0
0
5
MAX
15
±
10%)
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns