CY7C199C-20ZXIT Cypress Semiconductor Corp, CY7C199C-20ZXIT Datasheet - Page 8

• Manufacturer Part Number: CY7C199C-20ZXIT
• Description: IC SRAM 256KBIT 20NS 28TSOP
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C199C-20ZXIT

• Format - Memory: RAM
• Memory Type: SRAM - Asynchronous
• Memory Size: 256K (32K x 8)
• Speed: 20ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-TSOP I
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Document #: 38-05408 Rev. *B
Timing Waveforms
Write Cycle No. 1 (WE Controlled)
Write Cycle No. 2 (CE Controlled)
Notes:
13. This cycle is WE controlled, OE is HIGH during write.
14. Data In/Out is high impedance if OE = V
15. During this period the I/Os are in output state and input signals should not be applied.
16. This cycle is CE controlled.
17. If CE goes HIGH simultaneously with WE going HIGH, the output remains in a high-impedance state.
Data In/Out
Data In/Out
Address
Address
WE
WE
OE
CE
CE
Undefined
see footnotes
High Z
(continued)
[14, 16, 17]
[13, 14, 15]
IH
t
.
t
HZOE
SA
t
SA
t
AW
t
SCE
t
AW
Data-In Valid
t
t
WC
WC
Data-In Valid
t
t
t
SD
PWE
SD
t
SCE
t
t
HA
HD
t
HD
t
HA
CY7C199C
High Z
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