cym1720 Cypress Semiconductor Corporation., cym1720 Datasheet - Page 4

• Manufacturer Part Number: cym1720
• Description: 32k X 24 Static Ram Module
• Manufacturer: Cypress Semiconductor Corporation.

Read Cycle No. 2
Write Cycle No. 1 (WE Controlled)
Switching Waveforms
Notes:
10. Data I/O will be high impedance if OE = V
Read
7.
8.
9.
ADDRESS
DATA OUT
DATA OUT
ADDRESS
CURRENT
DATA I/O
DATA IN
WE is HIGH for read cycle.
Device is continuously selected, CS = V
Address valid prior to or coincident with CS transition LOW.
SUPPLY
Cycle
WE
CS
V
OE
CS
CC
No. 1
[7,9]
[7,8]
PREVIOUS DATA VALID
HIGH IMPEDANCE
t
PU
t
LZCS
t
DATA UNDEFINED
SA
IL
t
IH
ACS
and OE= V
[6,10]
t
LZOE
.
t
OHA
t
DOE
50%
IL
.
t
AA
t
SCS
t
AW
t
RC
t
WC
4
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%
CYM1720
IMPEDANCE
HIGH
1720–5
1720–6
1720–7
ICC
ISB