as7c251mpfd3236a ETC-unknow, as7c251mpfd3236a Datasheet
as7c251mpfd3236a
Related parts for as7c251mpfd3236a
as7c251mpfd3236a Summary of contents
Page 1
February 2005 2.5V 1M × 32/36 pipelined burst synchronous SRAM Features • Organization: 1,048,576 words × bits • Fast clock speeds to 200 MHz • Fast clock to data access: 3.1/3.5/3.8 ns • Fast OE access time: ...
Page 2
Mb Synchronous SRAM products list Org Part Number 2MX18 AS7C252MPFS18A 1MX32 AS7C251MPFS32A 1MX36 AS7C251MPFS36A 2MX18 AS7C252MPFD18A 1MX32 AS7C251MPFD32A 1MX36 AS7C251MPFD36A 2MX18 AS7C252MFT18A 1MX32 AS7C251MFT32A 1MX36 AS7C251MFT36A 2MX18 AS7C252MNTD18A 1MX32 AS7C251MNTD32A 1MX36 AS7C251MNTD36A 2MX18 AS7C252MNTF18A 1MX32 AS7C251MNTF32A 1MX36 AS7C251MNTF36A ...
Page 3
Pin assignment 100-pin TQFP - top view NC/DQPc 1 DQc0 2 DQc1 DDQ V 5 SSQ 6 DQc2 DQc3 7 8 DQc4 DQc5 SSQ V 11 DDQ 12 DQc6 DQc7 ...
Page 4
Functional description The AS7C251MPFD32A/36A is a high-performance CMOS 32-Mbit synchronous Static Random Access Memory (SRAM) device organized as 1,048,576 words x 32/36. It incorporates a two-stage register-register pipeline for highest frequency on any given technology. Fast cycle times of 5/6/7.5 ...
Page 5
Signal descriptions Pin I/O Properties CLK I CLOCK Clock. All inputs except OE, ZZ, and LBO are synchronous to this clock. A,A0,A1 I SYNC Address. Sampled when all chip enables are active and when ADSC or ADSP are asserted. DQ[a,b,c,d] ...
Page 6
Write enable truth table (per byte) Function GWE BWE L Write All Bytes H Write Byte a H Write Byte c and Read H Key don’t care low high ...
Page 7
Synchronous truth table 1 CE0 CE1 CE2 ADSP ADSC ...
Page 8
Absolute maximum ratings Parameter Power supply voltage relative to GND Input voltage relative to GND (input pins) Input voltage relative to GND (I/O pins) Power dissipation Short circuit output current Storage temperature Temperature under bias Stresses greater than those listed ...
Page 9
DC electrical characteristics Parameter † Input leakage current |I LI Output leakage current |I LO Input high (logic 1) voltage V Input low (logic 0) voltage V Output high voltage V Output low voltage V † LBO and ZZ pins ...
Page 10
Timing characteristics over operating range Parameter Clock frequency Cycle time Clock access time Output enable low to data valid Clock high to output low Z Data output invalid from clock high Output enable low to output low Z Output enable ...
Page 11
Key to switching waveforms Rising input Timing waveform of read cycle CLK t ADSPS t ADSPH ADSP t ADSCS ADSC Address GWE, BWE t t CSS CSH CE0, CE2 CE1 ...
Page 12
Timing waveform of write cycle t CH CLK t t ADSPS ADSPH ADSP ADSC Address BWE BW[a: CSS CSH CE0, CE2 CE1 ADV OE Din D(A1) Read Sus- Q(A1) pend Write D(A1) Note: ...
Page 13
Timing waveform of read/write cycle (ADSP Controlled; ADSC High) CLK t t ADSPS ADSPH ADSP Address A1 GWE CE0, CE2 CE1 ADV OE Din Dout DSEL Read Q(A1) Note: Ý = XOR when LBO = high/no connect; Ý = ADD ...
Page 14
Timing waveform of read/write cycle(ADSC controlled, ADSP = HIGH) CLK t t ADSCS ADSCH ADSC ADDRESS GWE t t CSS CSH CE0,CE2 CE1 ADV LZOE Q(A1) Dout Din READ READ Q(A1) Q(A2) 2/11/05, ...
Page 15
Timing waveform of power down cycle CLK t t ADSPS ADSPS ADSP ADSC A1 ADDRESS GWE t t CSS CSH CE0,CE2 CE1 ADV LZOE Din Dout Q(A1 supply S READ USPEND READ Q(A1) Q(A1) ...
Page 16
AC test conditions • Output load: For LZC LZOE HZOE • Input pulse level: GND to 2.5V. See Figure A. • Input rise and fall time (measured at 0.25V and 2.25V): 2 ns. See Figure ...
Page 17
Package dimensions 100-pin quad flat pack (TQFP) TQFP Min Max A1 0.05 0.15 A2 1.35 1.45 b 0.22 0.38 c 0.09 0.20 D 13.90 14.10 E 19.90 20.10 e 0.65 nominal Hd 15.85 16.15 He 21.80 22.20 L 0.45 0.75 ...
Page 18
Ordering information Package & Width 200 MHz AS7C251MPFD32A-200TQC TQFP x32 AS7C251MPFD32A-200TQI AS7C251MPFD36A-200TQC TQFP x36 AS7C251MPFD36A-200TQI Note: Add suffix ‘N’ to the above part numbers for lead free parts (Ex AS7C251MPFD32A-200TQC Part numbering guide AS7C ...
Page 19
Alliance Semiconductor Corporation 2575, Augustine Drive, Santa Clara, CA 95054 Tel: 408 - 855 - 4900 Fax: 408 - 855 - 4999 www.alsc.com © Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt ...