SRAM
Austin Semiconductor, Inc.
WRITE CYCLE NO. 1
(WE Controlled)
t
WC
AS5C4009
ADDRESS
t
CW(4)
CE\
t
AW
t
WP(3)
WE\
t
AS(5)
t
DW
DATA IN
t
WHZ
Data Valid
t
OW
DATA OUT
Data Undefined
WRITE CYCLE NO. 2
(Write Enabled Controlled)
t
WC
ADDRESS
t
AS(5)
t
CW(4)
t
WR(6)
CE\
t
AW
WE\
t
DW
DATA IN
DATA OUT
High-Z
Data Valid
High-Z
NOTES:
1. tHZ and tOHZ are defined as the time at which the outputs achieve the open circuit conditions and are not referenced to output voltage levels.
2. At any given temperature adn voltage condition, tHZ (MAX) is less than tLZ (MIN) both for a given device and from device to
device interconnection.
3. A write occurs during the overlap of a low CE\ adn a low WE\. A write begins at the latest transistion among CE\ going Low and
WE\ going Low: A write end at the earliest transistion among CE\ going High and WE\ going High, tWP is measured from the
beginning of write to the end of write.
4. tCW is measured from the CE\ going Low to end of write.
5. tAS is measured from the address valid to the beginning of write.
6. tWR is measure from the end of write to the address change. tWR applied in case a write ends are CE\ or WE\ going High.
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
AS5C4009
Rev. 5.1 6/05
7
761
876543210987654325
876543210987654321
8765432109876543254321
8765432109876543254321
761
8765432109876543214321
8765432109876543214321
761
876543210987654321
876543210987654321
765
t
WP(3)
654321
4
6
332
75433100877546213
6542219986656511
454
6543210987654322321
76543210987654311
6543210987654321321
6541
7644211988655322121
6543210987654321321
7654321098765634
6553320097764432
45
t
DH
t
DH
t
WR(6)
7654321
7654321
7654321
7654321
7654321
9876543432109876543210987654321
321
654321 8 5 2
543
543
76
9876543432109876543210987654321
9876565432109876543210987654321
45432109876543210987654321
521 09 76 43 1098 54321
9876565212109876543210987654321
65212109876543210987654321
43432109876543210987654321
987654321
109
987652329876543210987654321
4101876543210987654321
987652129876543210987654321
4109876543210987654321
301
987652129876543210987654321
4309876543210987654321
101
987652129876543210987654321
4109876543210987654321
301
AUSTIN [ AUSTIN SEMICONDUCTOR ]
