CY7C148 Cypress Semiconductor, CY7C148 Datasheet - Page 4

• Manufacturer Part Number: CY7C148
• Description: (CY7C148 / CY7C149) 1K x 4 Static RAM
• Manufacturer: Cypress Semiconductor

Switching Waveforms
Read Cycle No. 1
Read Cycle No. 2
Write Cycle No.1 (WE Controlled)
Notes:
10. WE is HIGH for read cycle.
11. Device is continuously selected, CS = V
12. Address valid prior to or coincident with CS transition LOW.
DATA OUT
DATA OUT
CURRENT
DATA OUT
ADDRESS
ADDRESS
SUPPLY
DATA IN
V
CS
CS
WE
CC
[10,11]
[10,12]
PREVIOUS DATA VALID
HIGH IMPEDANCE
t
PU
t
LZ
t
DATA UNDEFINED
AS
IL
t
ACS
.
t
OH
50%
t
AA
t
CW
t
AW
t
RC
t
WC
4
t
RC
DATA–IN VALID
t
WZ
t
t
WP
DW
DATA VALID
HIGH IMPEDANCE
t
DH
DATA VALID
t
t
OW
WA
t
HZ
t
PD
50%
CY7C148
CY7C149
IMPEDANCE
HIGH
C148–6
C148–7
C148–8
ICC
ISB