as7c3256a Alliance Memory, Inc, as7c3256a Datasheet

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as7c3256a

Manufacturer Part Number
as7c3256a
Description
3.3v 32k X 8 Cmos Sram Common I/o
Manufacturer
Alliance Memory, Inc
Datasheet

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4/23/04; v.2.0
Selection guide
Features
• Pin compatible with AS7C3256
• Industrial and commercial temperature options
• Organization: 32,768 words × 8 bits
• High speed
• Very low power consumption: ACTIVE
• Very low power consumption: STANDBY
• Easy memory expansion with CE and OE inputs
Logic block diagram
Maximum address access time
Maximum output enable access time
Maximum operating current
Maximum CMOS standby current
April 2004
- 10/12/15/20 ns address access time
- 5, 6, 7, 8 ns output enable access time
- 180mW max @ 10 ns
- 7.2 mW max CMOS I/O
GND
V
A7
A0
A1
A2
A3
A4
A5
A6
CC
A
8
A
9
Column decoder
256 X 128 X 8
Input buffer
10
(262,144)
A
Array
11
A
12
A
13
A
14
A
3.3V 32K X 8 CMOS SRAM (Common I/O)
Alliance Semiconductor
Control
circuit
-10
10
50
5
2
WE
OE
CE
I/O7
I/O0
Pin arrangement
A11
A13
A14
A12
V
WE
OE
A9
A8
A7
A6
A5
A4
A3
-12
12
45
CC
6
2
• TTL-compatible, three-state I/O
• 28-pin JEDEC standard packages
• ESD protection ≥ 2000 volts
• Latch-up current ≥ 200 mA
28-pin TSOP 1 (8×13.4 mm)
®
- 300 mil SOJ
- 8 × 13.4 mm TSOP 1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
AS7C3256A
-15
15
40
7
2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Copyright © Alliance Semiconductor. All rights reserved.
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
A1
A2
I/O0
GND
I/O1
I/O2
A14
A12
A5
A7
A6
A4
A3
A2
A1
A0
-20
AS7C3256A
20
35
8
2
28-pin SOJ (300 mil)
P. 1 of 9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Unit
mA
mA
ns
ns
V
WE
A13
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
CC

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as7c3256a Summary of contents

Page 1

... CE -10 - Alliance Semiconductor AS7C3256A 28-pin SOJ (300 mil) A14 1 A12 2 A10 I/O3 AS7C3256A 21 GND I/O1 12 I/O2 13 GND 14 -15 - Copyright © ...

Page 2

... I/O pins with the data word referenced by the input address. When chip enable or output enable is high, or write enable is low, output drivers stay in high-impedance mode. All chip inputs and outputs are TTL-compatible. Operation is from a single 3.3 ±0.3V supply. The AS7C3256A is packaged in high volume industry standard packages. ...

Page 3

... IH – 20 – –0.2V CC – 2.0 – = Min – 0.4 – Min 2.4 – 2 NOMINAL) CC Symbol Signals C A, CE, WE I/O I/O Alliance Semiconductor AS7C3256A Typical Max 3.3 3.6 – V +0.5 CC – 0.8 0 – 70 – 85 -12 -15 -20 Max Min Max Min Max 1 – 1 – – 1 – – ...

Page 4

... PU t – 10 – Falling input 3,6,7 Data valid 3,6,8 OLZ Data valid 50% Alliance Semiconductor AS7C3256A -15 -20 Min Max Min Max Unit Notes 15 – 20 – ns – 15 – – 15 – – 7 – – 3 – ...

Page 5

... – 3 – OW 10, Data valid t WZ 10, Data valid Alliance Semiconductor AS7C3256A -15 -20 Min Max Min Max Unit 15 – 20 – 10 – 12 – 10 – 12 – 0 – 0 – 9 – 12 – 0 – 0 – 0 – 0 – ...

Page 6

... All write cycle timings are referenced from the last valid address to the first transitioning address. 12 N/A 13 C=30pF, except on High Z and Low Z parameters, where C=5pF. 4/23/04; v.2.0 ® +3.3V Ω 320 D out Ω 13 350 C GND Figure B: Output load required to meet I specification ± 500mV from steady-state voltage. Alliance Semiconductor AS7C3256A Thevenin equivalent Ω 168 D +1.72V out ...

Page 7

... Package diagrams 28-pin SOJ D e Pin 1 A2 28-pin TSOP1 4/23/04; v.2.0 ® α Alliance Semiconductor AS7C3256A 28-pin SOJ Min in inches A 0.128 A A1 0.026 A2 Seating 0.095 Plane B 0.026 b 0.016 c 0.007 D 0.720 E 0.255 E1 0.295 E2 0.330 e 0.050 BSC 28-pin TSOP1 8× ...

Page 8

... Ordering information Temperature Package / Access time Commercial Plastic SOJ, 300 mil Industrial Commercial TSOP 8x13.4mm Industrial Note: Add suffix ‘N’to the above part number for lead free parts. (Ex. AS7C3256A-10JIN) Part numbering system AS7C 3 Voltage: SRAM prefix 3 = 3.3V supply Device number Access time 4/23/04; v.2.0 ® ...

Page 9

... Alliance products in such life- supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use. ® Copyright © Alliance Semiconductor All Rights Reserved Part Number: AS7C3256A Document Version: v.2.0 AS7C3256A ...

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