256K (32768 words 8 bits) SRAM - Sanyo
Description
Ordering number : ENN*6302
CMOS IC
LC35256FM, FT-55U/70U
256K (32768 words × 8 bits) SRAM Control Pins: OE and CE
Preliminary Overview
The LC35256FM and LC35256FT are asynchronous silicon-gate CMOS SRAMs with a 32K-word by 8-bit structure.
These are full-CMOS devices with 6 transistors per memory cell, and feature low-voltage operation, a low operating current drain, and an ultralow standby current.
Control inputs include OE for fast memory access and CE (chip enable) 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.
Package Dimensions
unit: mm 3187A-SOP28D
[LC35256FM]
28 15
0.
15
1
18.
0
14
• Supply voltage range: 4.
5 to 5.
5 V • Access time at 5 V operation: LC35256FM, FT-55U: 55 ns (maximum) LC35256FM, FT-70U: 70 ns (maximum) • Standby current: 3.
0 µA (Ta ≤ 70°C) 5.
0 µA (Ta ≤ 85°C) • Operating temperature: –40 to +85°C • Data retention voltage: 2.
0 to 5.
5 V • All I/O levels: TTL compatible • Input/output shared function pins, 3-state output pins • No clock required • Package 28-pin SOP (450 mil) plastic package: LC35256FM 28-pin TSOP (8 × 13.
4 mm) plastic package: LC35256FT
0.
4
1.
27
0.
1 2.
3
Features
SANYO: SOP28D
unit: mm 3221-TSOP28 (Type I)
[LC35256FT]
21 8
11.
8
1.
27max
22
28 1 0.
55 8.
1
7 0.
2
0.
125
0.
08
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 t...
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