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Sanyo Electric Components Datasheet

LC35W256ET-10W Datasheet

256K (32K words x 8 bits) SRAM Control pins: OE and CE

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Ordering number : ENN6304
CMOS IC
LC35W256EM, ET-10W
256K (32K words × 8 bits) SRAM
Control pins: OE and CE
Overview
The LC35W256EM-10W and LC35W256ET-10W are
asynchronous silicon-gate CMOS SRAMs with a 32768-
word by 8-bit structure. These are full-CMOS devices
with 6 transistors per memory cell, and feature ultralow-
voltage operation, a low operating current drain, and an
ultralow standby current. Control inputs include OE for
fast memory access and CE for power saving and device
selection. This makes these devices optimal for systems
that require low power or battery backup, and makes
memory expansion easy. The ultralow standby current
allows these devices to be used with capacitor backup as
well.
Features
• Supply voltage range: 2.7 to 3.6 V
• Access time: 100 ns (maximum)
• Standby current: 0.8 µA (Ta 60°C)
4.0 µA (Ta 70°C)
• Operating temperature: –10 to +70°C
• Data retention voltage: 2.0 to 3.6 V
• All I/O levels: CMOS compatible (0.8 VCC, 0.2 VCC)
• Input/output shared function pins, 3-state output pins
• No clock required (fully static circuits)
• Package
28-pin SOP (450 mil) plastic package:
LC35W256EM-10W
28-pin TSOP (8 × 13.4 mm) plastic package:
LC35W256ET-10W
Package Dimensions
unit: mm
3187A-SOP28D
[LC35W256EM-10W]
28 15
0.15
1 14
18.0
0.4 1.27
unit: mm
3221-TSOP28 (Type I)
SANYO: SOP28D
[LC35W256ET-10W]
21 8
22 28 1
7
0.55 0.2
8.1
0.125
SANYO: TSOP28 (Type I)
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
12800RM (OT) No. 6304-1/6


Sanyo Electric Components Datasheet

LC35W256ET-10W Datasheet

256K (32K words x 8 bits) SRAM Control pins: OE and CE

No Preview Available !

Pin Assignment (Top view)
SOP28
A14 1
A12 2
A7 3
A6 4
A5 5
A4 6
A3 7
A2 8
A1 9
A0 10
I/O1 11
I/O2 12
I/O3 13
GND 14
28 VCC
27 WE
26 A13
25 A8
24 A9
23 A11
22 OE
21 A10
20 CE
19 I/O8
18 I/O7
17 I/O6
16 I/O5
15 I/O4
LC35W256EM-10W
Block Diagram
LC35W256EM, ET10W
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
TSOP28
LC35W256ET-10W
A6
A7
A8
A9
Memory cell array
VCC
A10 512 × 512
A11 GND
A12
A13
A14
I/O1
Column I/O
circuit
Output
data
buffer
I/O8 Column decoder
Address buffer
A0 A1 A2 A3 A4 A5
CE
WE
OE
21 A10
20 CE
19 I/O8
18 I/O7
17 I/O6
16 I/O5
15 I/O4
14 GND
13 I/O3
12 I/O2
11 I/O1
10 A0
9 A1
8 A2
No. 6304-2/6


Part Number LC35W256ET-10W
Description 256K (32K words x 8 bits) SRAM Control pins: OE and CE
Maker Sanyo
Total Page 6 Pages
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