P4C174-8JMB datasheet, PDF - EEWORLD Datasheet

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P4C174-8JMB: DescriptionHIGH SPEED 8K x 8 CACHE TAG STATIC RAM; File Size279KB，12 Pages; ManufacturerPyramid Semiconductor Corporation; Websitehttp://www.pyramidsemiconductor.com/

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P4C174-8JMB Overview

HIGH SPEED 8K x 8 CACHE TAG STATIC RAM

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P4C174

HIGH SPEED 8K x 8

CACHE TAG STATIC RAM

FEATURES

High Speed Address-To-Match - 8 ns Maximum

Access Time

High-Speed Read-Access Time

– 8/10/12/15/20/25 ns (Commercial)

– 15/20/25 ns (Military)

Open Drain MATCH Output

Reset Function

8-Bit Tag Comparison Logic

Automatic Powerdown During Long Cycles

Data Retention at 2V for Battery Backup

Operation

Advanced CMOS Technology

Low Power Operation

Package Styles Available

— 28 Pin 300 mil DIP

— 28 Pin 300 mil Plastic SOJ

Single Power Supply

— 5V±10%

DESCRIPTION

The P4C174 is a 65,536 bit high speed cache tag static

RAM organized as 8K x 8. The CMOS memory has equal

access and cycle times. Inputs are fully TTL-compatible.

The cache tag RAMs operate from a single 5V±10%

power supply. An 8-bit data comparator with a MATCH

output is included for use as an address tag comparator

in high speed cache applications. The reset function

provides the capability to reset all memory locations to a

LOW level.

The MATCH output of the P4C174 reflects the compari-

son result between the 8-bit data on the I/O pins and

the addressed memory location. 8K Cache lines can be

mapped into 1M-Byte address spaces by comparing 20

address bits organized as 13-line address bits and 7-

page address bits.

Low power operation of the P4C174 is enhanced by

automatic powerdown when the memory is deselected or

during long cycle times. Also, data retention is main-

tained down to V

= 2.0. Typical battery backup appli-

cations consume only 30

W at V

3.0V.

FUNCTIONAL BLOCK DIAGRAM

PIN CONFIGURATION

DIP (C5, P5), SOJ (J5)

Document #

SRAM118

REV C

Revised August 2006

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Shortcut: 00 01 02 03 04 05 06 07 08 09 0A 0C 0F 0J 0L 0M 0R 0S 0T 0Z 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 1H 1K 1M 1N 1P 1S 1T 1V 1X 1Z 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 2G 2K 2M 2N 2P 2Q 2R 2S 2T 2W 2Z 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 3G 3H 3J 3K 3L 3M 3N 3P 3R 3S 3T 3V 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4M 4N 4P 4S 4T 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5E 5G 5H 5K 5M 5N 5P 5S 5T 5V 60 61 62 63 64 65 66 67 68 69 6A 6C 6E 6F 6M 6N 6P 6R 6S 6T 70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7M 7N 7P 7Q 7V 7W 7X 80 81 82 83 84 85 86 87 88 89 8A 8D 8E 8L 8N 8P 8S 8T 8W 8Y 8Z 90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9F 9G 9H 9L 9S 9T 9W

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