7C256-35 Datasheet PDF - ETC
Part Number | 7C256-35 | |
Description | High Performance 32Kx8 CMOS SRAM | |
Manufacturers | ETC | |
Logo | ||
There is a preview and 7C256-35 download ( pdf file ) link at the bottom of this page. Total 8 Pages |
Preview 1 page No Preview Available ! High Performance
32K×8
CMOS SRAM
32K×8 CMOS SRAM (Common I/O)
AS7C256
AS7C256L
FEATURES
• Organization: 32,768 words × 8 bits
• High speed
– 10/12/15/20/25/35 ns address access time
– 3/3/4/5/6/8 ns output enable access time
• Low power consumption
– Active: 660 mW max (10 ns cycle)
– Standby: 11 mW max, CMOS I/O
2.75 mW max, CMOS I/O, L version
– Very low DC component in active power
• 2.0V data retention (L version)
• Equal access and cycle times
• Easy memory expansion with CE and OE inputs
• TTL-compatible, three-state I/O
• 28-pin JEDEC standard packages
– 300 mil PDIP and SOJ
Socket compatible with 7C512 and 7C1024
– 330 mil SOIC
– 8×13.4 TSOP
• ESD protection > 2000 volts
• Latch-up current > 200 mA
LOGIC BLOCK DIAGRAM
PIN ARRANGEMENT
Vcc
GND
A0
A1
A2
A3
A4
A5
A6
A14
INPUT BUFFER
256×128×8
ARRAY
(262,144)
I/O7
I/O0
COLUMN DECODER
AAAAAAA
7 8 9 10 11 12 13
CONTROL
CIRCUIT
WE
OE
CE
SELECTION GUIDE
AS7C256-01
DIP, SOJ, SOIC
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
TSOP 8×13.4
OE
A11
A9
A8
A13
WE
Vcc
A14
A12
A7
A6
A5
A4
A3
22
23
24
25
26
27
28
1
2
3
4
5
6
7
1 28 Vcc
2 27 WE
3 26 A13
4 25 A8
5 24 A9
6 23 A11
7 22 OE
8 21 A10
9 20 CE
10 19 I/O7
11 18 I/O6
12 17 I/O5
13 16 I/O4
14 15 I/O3
AS7C256
21 A10
20 CE
19 I/O7
18 I/O6
17 I/O5
16 I/O4
15 I/O3
14 GND
13 I/O2
12 I/O1
11 I/O0
10 A0 AS7C256-02
9 A1
8 A2
Maximum Address Access Time
Maximum Output Enable Access Time
Maximum Operating Current
Maximum CMOS Standby Current
L
7C256-10 7C256-12 7C256-15 7C256-20 7C256-25 7C256-35 Unit
10 12 15 20 25 35 ns
3 3 4 5 6 8 ns
120 115 110 100 90 80 mA
2.0 2.0 2.0 2.0 2.0 2.0 mA
0.5 0.5 0.5 0.5 0.5 0.5 mA
ALLIANCE SEMICONDUCTOR
|
|
AS7C256
AS7C256L
WRITE CYCLE 11
Parameter
Write Cycle Time
Chip Enable to Write End
Address Setup to Write End
Address Setup Time
Write Pulse Width
Address Hold From End of Write
Data Valid to Write End
Data Hold Time
Write Enable to Output in High Z
Output Active from Write End
(VCC = 5V±10%, GND = 0V, Ta = 0°C to +70°C)
-10 -12 -15 -20 -25 -35
Symbol Min Max Min Max Min Max Min Max Min Max Min Max Unit Notes
tWC 10 – 12 – 15 – 20 – 20 – 30 – ns
tCW 9 – 10 – 12 – 12 – 15 – 20 – ns
tAW 9 – 10 – 12 – 12 – 15 – 20 – ns
tAS 0 – 0 – 0 – 0 – 0 – 0 – ns
tWP 7 – 8 – 9 – 12 – 15 – 17 – ns
tAH 0 – 0 – 0 – 0 – 0 – 0 – ns
tDW 6 – 6 – 8 – 10 – 10 – 15 – ns
tDH 0 – 0 – 0 – 0 – 0 – 0 – ns 4, 5
tWZ – 5 – 5 – 5 – 5 – 5 – 5 ns 4, 5
tOW 3 – 3 – 3 – 3 – 3 – 3 – ns 4, 5
TIMING WAVEFORM OF WRITE CYCLE 1 10, 11
(WE Controlled)
Address
WE
Din
Dout
tWC
tAW
tAH
tASAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
tWZ
tWP
tDW
Data Valid
tOW
tDH
TIMING WAVEFORM OF WRITE CYCLE 2 10, 11
AS7C256-05
(CE Controlled)
tWC
tAW
Address
tAS tCW
CE
WE AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
tWZ
tWP
Din
Dout
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
tAH
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
tDW tDH
Data Valid
AS7C256-06
5
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for 7C256-35 electronic component. |
Information | Total 8 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ 7C256-35.PDF Datasheet ] |
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