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參數(shù)資料
| 型號： | EM23C256 |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | High Performance 32K × 8 CMOS ROM(高性能256K位（32K × 8）CMOS ROM) |
| 中文描述： | 高性能32K的× 8的CMOS光盤（高性能256K位（32K的× 8）的CMOS光盤） |
| 文件頁數(shù)： | 1/5頁 |
| 文件大小： | 34K |
| 代理商： | EM23C256 |
1
* This specification are subject to be changed without notice.
32K X 8 CMOS ROM
10.22.1997
EM23C256 SERIES
GENERAL DESCRIPTION
The EM23C256 series high performance Read Only Memory is organized as 32,768 words by 8 bits with
access time from 150 ns to 500 ns according to the supplying voltage. It is designed to be compatible with all
microprocessor and similar applications where high performance large bit storage and simple interface are
important design considerations.
The EM23C256P offers the simplest operation (no power down). Its programmable chip selects allow up to
four 256K ROMs to be Wired-OR without external decoding.
The EM23C256AP has the automatic power down feature. The power down capability is controlled by the
Chip Enable (CE/CEB) input. When CEB goes to high or CE goes low, the device will automatically goes to
power down mode and remains in a low power standby mode as long as CE remains high. This unique feature
provides system level power savings as much as 90%. An additional feature of the EM23C256AP is the Output
Enable (OE/OEB) function. This eliminates bus connection in multiple bus microprocessor systems.
FEATURES
32,768 x 8 bit organization
Access time:
500 ns (max.) at 2.7V
≤
V
CC
≤
3.3V
150 ns (max.) at 4.5V
≤
V
CC
≤
5.5V
Low-power consumption:
Operating: 193 mW (max.)
Standby: 165
μ
W (max.)
Fully-static operation
Three-state outputs
Wide range power supply:
256P3, 256AP3, 256M3, 256AM3
→
V
CC
=3V Range from 2.7 V to 3.3 V
256P5, 256AP5, 256M5, 256AM5
→
V
CC
=5V Range from 4.5 V to 5.5 V
Completely TTL compatible.
EM23C256P, EM23C256M
- Non power down version.
- Two programmable chip selects (CS).
EM23C256AP, EM23C256AM
- Automatic power down (CE).
- Output Enable function (OE).
Package:
EM23C256P, EM23C256AP
EM23C256M, EM23C256AM
- 32 pins 600 mil plastic DIP.
- 32 pins 300 mil plastic SOP.
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