AS7C256A-15JCN Alliance Memory, AS7C256A-15JCN Datasheet

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AS7C256A-15JCN

Manufacturer Part Number
AS7C256A-15JCN
Description
SRAM 256K, 5V, 15ns, FAST 32K x 8 Asynch SRAM
Manufacturer
Alliance Memory
Type
SRAMr
Datasheet

Specifications of AS7C256A-15JCN

Rohs
yes
Memory Size
256 kbit
Organization
32 k x 8
Access Time
15 ns
Supply Voltage - Max
5.5 V
Supply Voltage - Min
4.5 V
Maximum Operating Current
75 mA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Package / Case
SOJ-28
Interface
TTL
Memory Type
CMOS
Factory Pack Quantity
25

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AS7C256A-15JCNTR
Quantity:
1 798
9/24/04; v.1.2
Selection guide
Features
• Pin compatible with AS7C256
• 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
September 2004
- 10/12/15/20 ns address access time
- 5, 6, 7, 8 ns output enable access time
- 412.5 mW max @ 10 ns
- 11 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
5V 32K X 8 CMOS SRAM (Common I/O)
Control
circuit
Alliance Semiconductor
-10
10
75
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
70
CC
6
2
• TTL-compatible, three-state I/O
• 28-pin JEDEC standard packages
• ESD protection ≥ 2000 volts
• Latch-up current ≥ 200 mA
• 2.0V Data retention
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
AS7C256A
-15
15
65
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
20
60
8
2
28-pin SOJ (300 mil)
AS7C256A
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

Related parts for AS7C256A-15JCN

AS7C256A-15JCN Summary of contents

Page 1

... Alliance Semiconductor AS7C256A 28-pin SOJ (300 mil) A14 1 28 A12 2 27 A10 I/O3 AS7C256A 21 GND GND 14 ...

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 5.0 ±0.5V supply. The AS7C256A is packaged in high volume industry standard packages. ...

Page 3

... CC IL – 0mA IH – 45 – –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 AS7C256A Typical Max 5.0 5.5 – V +0.5 CC – 0.8 0 – 70 – 85 -15 -20 Unit Notes 1 – 1 – 1 µA 1 – 1 – 1 µA 70 – 65 – – ...

Page 4

... PU t – 10 – Falling input 2,5,6 Data valid 2,5,7 OLZ Data valid 50% Alliance Semiconductor AS7C256A -15 -20 Min Max Min Max Unit Notes 15 – 20 – ns – 15 – – 15 – – 7 – – 3 – ...

Page 5

... – 3 – Data valid Data valid Alliance Semiconductor AS7C256A -15 -20 Min Max Min Max Unit 15 – 20 – 10 – 12 – 10 – 12 – 0 – 0 – 9 – 12 – 0 – 0 – 0 – ...

Page 6

... C=30pF, except on High Z and Low Z parameters, where C=5pF. 9/24/04; v.1.2 ® See Figure A. +5.0V 480 D out Ω 255 C GND Figure B: Output load required to meet I specification Alliance Semiconductor AS7C256A Thevenin equivalent Ω Ω 168 10 D +1.72V out ± 500mV from steady-state voltage ...

Page 7

... Package diagrams 28-pin SOJ D e Pin 1 A2 28-pin TSOP1 9/24/04; v.1.2 ® Alliance Semiconductor AS7C256A 28-pin SOJ Min in inches A 0.128 A A1 0.026 A2 0.095 Seating 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

... 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. AS7C256A-10JIN) Part numbering system AS7C 256A –XX SRAM prefix Device number Access time 9/24/04; v.1.2 ® ...

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: AS7C256A Document Version: v.1.2 AS7C256A ...

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