km68257c Samsung Semiconductor, Inc., km68257c Datasheet - Page 6

• Manufacturer Part Number: km68257c
• Description: 32kx8 Bit High Speed Static Ram 5v Operating , Evolutionary Pin Out. Operated At Commercial Temperature Range.
• Manufacturer: Samsung Semiconductor, Inc.

KM68257C/CL
TIMING WAVE FORM OF READ CYCLE(2)
ADD
CS
OE
Data Out
Vcc
Current
NOTES(READ CYCLE)
1. WE is high for read cycle.
2. All read cycle timing is referenced from the last valid address to the first transition address.
3. t
4. At any given temperature and voltage condition, t
5. Transition is measured 200
6. Device is continuously selected with CS=V
7. Address valid prior to coincident with CS transition low.
8. For common I/O applications, minimization or elimination of bus contention conditions is necessary during read and write cycl e.
TIMING WAVE FORM OF WRITE CYCLE(1)
ADD
OE
CS
WE
Data In
Data Out
HZ
and t
OHZ
are defined as the time at which the outputs achieve the open circuit condition and are not referenced to V
I
Icc
SB
§Æ
High-Z
from steady state voltage with Load(B). This parameter is sampled and not 100% tested.
IL.
t
AS(4)
HZ
(Max.) is less than t
t
(WE=VIH)
PU
(OE=Clock)
t
LZ(4,5)
t
OHZ(6)
t
OLZ
t
AA
50%
t
CO
t
OE
LZ
- 6 -
(Min.) both for a given device and from device to device.
t
AW
t
WC
t
CW(3)
t
RC
t
WP(2)
t
Data Valid
DW
Data Valid
High-Z(8)
t
WR(5)
t
DH
OH
PRELIMINARY
or V
CMOS SRAM
OL
Levels.
t
t
t
OHZ
t
February-1996
OH
HZ(3,4,5)
PD
50%
Rev 3.0