cym1821 Cypress Semiconductor Corporation., cym1821 Datasheet - Page 5

• Manufacturer Part Number: cym1821
• Description: 16k X 32 Static Ram Module
• Manufacturer: Cypress Semiconductor Corporation.

Switching Waveforms
Read Cycle No. 2 (WE Controlled)
Write Cycle No. 1 (WE Controlled)
Read Cycle No. 1
Notes:
10. Address valid prior to or coincident with CS transition LOW.
DATA OUT
8.
9.
ADDRESS
DATA OUT
DATA OUT
CURRENT
ADDRESS
DATA IN
SUPPLY
WE is HIGH for read cycle.
Device is continuously selected, CS = V
WE
CS
V
CS
OE
CC
[8,9]
PREVIOUS DATA VALID
HIGH IMPEDANCE
t
PU
t
LZCS
t
DATA UNDEFINED
SA
IL
t
[8,10]
ACS
t
[7]
and OE= V
LZOE
t
OHA
t
DOE
50%
IL
.
t
AA
t
SCS
t
AW
t
RC
t
WC
5
t
RC
t
HZWE
DATA VALID
t
PWE
t
SD
DATA VALID
HIGH IMPEDANCE
t
HD
t
DATA VALID
LZWE
t
HA
t
HZOE
t
HZCS
t
PD
50%
CYM1821
IMPEDANCE
HIGH
1821–6
1821–5
1821–7
ICC
ISB