IS62C256-70UI ISSI, Integrated Silicon Solution Inc, IS62C256-70UI Datasheet - Page 5

• Manufacturer Part Number: IS62C256-70UI
• Description: IC SRAM 256KBIT 70NS 28SOP
• Manufacturer: ISSI, Integrated Silicon Solution Inc

Specifications of IS62C256-70UI

• Format - Memory: RAM
• Memory Type: SRAM - Asynchronous
• Memory Size: 256K (32K x 8)
• Speed: 70ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

IS62C256
AC WAVEFORMS
READ CYCLE NO. 1
READ CYCLE NO. 2
Notes:
1.
2. The device is continuously selected.
3. Address is valid prior to or coincident with
Integrated Silicon Solution, Inc. — 1-800-379-4774
SR072-1E
05/12/99
WE
ADDRESS
is HIGH for a Read Cycle.
ADDRESS
D
D
OUT
OUT
OE
CS
HIGH-Z
t
LZCS
(1,2)
(1,3)
PREVIOUS DATA VALID
OE
,
CS
t
CS
AA
t
= V
DOE
LOW transitions.
t
t
LZOE
ACS
IL
.
t
OHA
t
RC
t
AA
t
RC
DATA VALID
t
HZCS
DATA VALID
t
OHA
t
t
OHA
HZOE
ISSI
READ1.eps
CS_RD2.eps
®
5