AS7C3256 AS7C3256L voltage CMOS SRAM Features Organization:

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

AS7C3256 AS7C3256L voltage CMOS SRAM Features Organization:

Datasheet Thumbnail

Top Searches for this datasheet

High Performance 3.3V CMOS SRAM
AS7C3256 AS7C3256L
voltage CMOS SRAM Features
Organization: 32,768 words bits Single 0.3V power supply tolerant specification High speed 10/12/15/20 address access time 3/3/4/5 output enable access time Very power consumption Active: max, cycle Standby: max, CMOS max, CMOS I/O, version 2.0V data retention Equal access cycle times Easy memory expansion with inputs TTL-compatible, three-state Ideal cache, modem, portable computing power reduction during idle mode 28-pin JEDEC standard packages PDIP 13.4 TSOP protection 2000 volts Latch-up current
Logic block diagram
Input buffer
arrangement
TSOP
I/O7 I/O6 I/O5 I/O4 I/O3 I/O2 I/O1 I/O0
DIP,
decoder
ARRAY (262,144)
I/O0
Selection guide
Maximum address access time Maximum output enable access time Maximum operating current Maximum CMOS standby current
Shaded areas contain advance information.
7C3256-10
7C3256-12
Column decoder
Control circuit
7C3256-15
7C3256-20
AS7C3256
Sense
AS7C3256
I/O7
I/O0 I/O1 I/O2
I/O7 I/O6 I/O5 I/O4 I/O3
Unit
ALLIANCE SEMICONDUCTOR
AS7C3256
Functional description
AS7C3256 3.3V high performance CMOS 262,144-bit Static Random-Access Memory (SRAM) organized 32,768 words bits. designed memory applications requiring fast data access voltage, including PentiumTM, PowerPCTM, portable computing. Alliance's advanced circuit design process techniques permit 3.3V operation without sacrificing performance operating margins. device enters standby mode when HIGH. CMOS standby mode consumes (1.1 version). Normal operation offers power reduction after initial access, resulting significant power savings during idle, suspend, stretch mode. Both versions AS7C3256 offer 2.0V data retention. Equal address access cycle times tRC, tWC) 10/12/15/20 with output enable access times (tOE) 3/3/4/5 ideal high performance applications. chip enable (CE) input permits easy memory expansion with multiple-bank memory organizations. write cycle accomplished asserting chip enable (CE) write enable (WE) LOW. Data input pins I/O0-I/O7 written rising edge (write cycle (write cycle avoid contention, external devices should drive pins only after outputs have been disabled with output enable (OE) write enable (WE). read cycle accomplished asserting chip enable (CE) output enable (OE) LOW, with write enable (WE) HIGH. chip drives pins with data word referenced input address. When chip enable output enable HIGH, write enable LOW, output drivers stay high-impedance mode. chip inputs outputs TTL-compatible tolerant. Operation from single 3.3±0.3V supply. AS7C3256 packaged high volume industry standard packages.
Absolute maximum ratings
Parameter Power supply voltage relative Input voltage relative Power dissipation Storage temperature (plastic) Temperature under bias output current Symbol Tstg Tbias Iout -0.5 -0.5 +4.6 +6.0 +150 Unit
Stresses greater than those listed under Absolute Maximum Ratings cause permanent damage device. This stress rating only functional operation device these other conditions outside those indicated operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect reliability.
Truth table
Data High High Dout Mode Standby (ISB, ISB1) Output disable Read Write
Key: Don't Care, LOW, HIGH
Recommended operating conditions
Parameter Supply voltage Input voltage
-2.0V pulse width less than tRC/2.
+70°C) Symbol -0.5 Unit
AS7C3256 operating characteristics1
Parameter Input leakage current Output leakage current Operating power supply current Standby power supply current Output voltage Symbol |ILI| |ILO| Test Conditions Max, VIH, Max, Vout VIL, fmax, Iout VIH, fmax VCC-0.2V, 0.2V VCC-0.2V,
(VCC 3.3±0.3V, +70°C) Unit
ISB1
Shaded areas contain advance information.
Capacitance2
Parameter Input capacitance capacitance Symbol CI/O Signals
MHz, Room Temperature, =3.3V) Test Conditions Vout Unit
Read cycle3,9
Parameter Read cycle time Address access time Chip enable (CE) access time Output enable (OE) access time Output hold from address change output HIGH output High output HIGH output High Power time Power down time
Shaded areas contain advance information.
(VCC 3.3±0.3V, +70°C) Symbol tACE tCLZ tCHZ tOLZ tOHZ Unit Notes
AS7C3256 Read waveform 13,6,7,9
Address Dout
AAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA
Address controlled
Data valid
Read waveform 23,6,8,9
OEAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAA
controlled
tOLZ
AAAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAA
tACE Dout tCLZ Supply current
tOHZ tCHZ
Data valid
Write cycle11
Parameter Write cycle time Chip enable write Address setup write Address setup time Write pulse width Address hold from write Data valid write Data hold time Write enable output High Output active from write
Shaded areas contain advance information.
(VCC 3.3±0.3V, +70°C) Symbol Unit Notes
AS7C3256 Write waveform 110,11
Address
AAAAAAAAAA AAAAAAAAAA AAAAAAAAAA AAAAAAAAAA
controlled
Data valid
Dout
Write waveform 210,11
Address
controlled
Data valid
AAAAAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAA
Dout
Data retention characteristics
Parameter data retention Data retention current Chip enable data retention time Operation recovery time Input leakage current Symbol ICCDR tCDR Test Conditions 2.0V VCC-0.2V VCC-0.2V 0.2V Unit
Data retention waveform
Data retention mode 3.0V tCDR AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
2.0V
3.0V
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AS7C3256
test conditions
Output load: Figure except tCLZ tCHZ Figure Input pulse level: 3.0V. Figure Input rise fall times: Figure Input output timing reference levels: 1.5V.
+3.3V Dout Thevenin equivalent Dout +1.72V +3.3V Dout Figure Output load +3.3V
*including scope capacitance
Figure Input waveform
Figure Output load tCLZ, tCHZ
Notes
During power-up, pull-up resistor required meet specification. This parameter sampled 100% tested. test conditions, Test Conditions, Figures tCLZ tCHZ specified with Figure Transition measured ±500mV from steady-state voltage. This parameter guaranteed tested. HIGH read cycle. read cycle. Address valid prior coincident with transition LOW. read cycle timings referenced from last valid address first transitioning address. must HIGH during address transitions. write cycle timings referenced from last valid address first transitioning address.
AS7C3256
Typical characteristics
Normalized supply current ICC, supply voltage Normalized ICC, Supply voltage Normalized access time supply voltage Normalized ICC, Normalized supply current ICC, ambient temperature Normalized ISB1 (log scale) Ambient temperature (°C) Normalized access time ambient temperature 3.30V Normalized supply current ISB1 ambient temperature
0.04 Ambient temperature (°C)
Normalized access time
Normalized access time
Normalized supply current cycle frequency 1/tRC, 1/tWC
25°C
Ambient temperature (°C) Output sink current output voltage
Normalized
3.3V
3.3V 25°C
Supply voltage Output source current output voltage
Cycle frequency (MHz)
Typical access time change output capacitive loading Change (ns) 3.3V
Output source current (mA)
Output sink current (mA)
3.3V 25°C
3.3V 25°C
1.65 Output voltage
1.65 Output voltage
Capacitance (pF)
1000
AS7C3256
Ordering information
Package Access Time Plastic DIP, Plastic SOJ, TSOP 8x13.4 AS7C3256-10PC AS7C3256L-10PC AS7C3256-10JC AS7C3256L-10JC AS7C3256-10TC AS7C3256L-10TC AS7C3256-12PC AS7C3256L-12PC AS7C3256-12JC AS7C3256L-12JC AS7C3256-12TC AS7C3256L-12TC AS7C3256-15PC AS7C3256L-15PC AS7C3256-15JC AS7C3256L-15JC AS7C3256-15TC AS7C3256L-15TC AS7C3256-20PC AS7C3256L-20PC AS7C3256-20JC AS7C3256L-20JC AS7C3256-20TC AS7C3256L-20TC
Shaded areas contain advance information.
Part numbering system
AS7C SRAM prefix Blank supply 3.3V supply
ILLINOIS North: El-Mech (312) 794-9100 South: CenTech (314) 291-4230 INDIANA Electro Sales (317) 921-5000 KANSAS CenTech (816) 358-8100 KENTUCKY Electro Sales (317) 921-5000 LOUISIANA Southern States Marketing North: (214) 238-7500 South: (713) 895-8533 MAINE Kitchen Kutchin (617) 229-2660 MARYLAND Chesapeake Tech. (301) 236-0530 MASSACHUSETTS Kitchen Kutchin (617) 229-2660 MICHIGAN Enco Group (810) 338-8600 MINNESOTA Case Associates (612) 831-6777 MISSOURI East: CenTech (314) 291-4230 West: CenTech (816) 358-8100 MISSISSIPPI Concord Component (205) 772-8883 MONTANA ES/Chase (503) 684-8500
Device number
NEBRASKA CenTech (816) 358-8100
Access Time
Package: PDIP TSOP 8x13.4
Commercial temperature range,
JAPAN Tokyo Bussan Micro Electronics +81-3-5421-1730 Kyoto Rohm Ltd. +81-75-311-2121 KOREA Korea +822-596-3880 fm@ktnet.co.kr Young Tech +822-369-7099 MALAYSIA Exer Technologies +65-741-4655 PUERTO RICO Micro-Electronic Comp. (787) 746-9897 SINGAPORE Exer Technologies +60-4-657-9592 TAIWAN Asian Specific Tech. +886-2-521-2363 Golden Electronics +886-2-698-1868 x505 Puteam International +886-2-729-0373
DOMESTIC REPS
ALABAMA Concord Component (205) 772-8883
Respresentatives, distributors, salesNEVADA offices North:
ARIZONA Competitive Technology (602) 265-9224 ARKANSAS Southern States Marketing (214) 238-7500 CALIFORNIA North: Brooks Technical (415) 960-3880 Area: Competitive Tech. (714) 450-0170 Diego: (619) 634-1488 COLORADO Technology Sales (303) 692-8835 CONNECTICUT Kitchen Kutchin (203) 239-0212 DELAWARE Vantage Sales (610) 272-2125 FLORIDA Micro-Electronic Comp. Deerfield Beach (954) 426-8944 Orlando (407) 682-9602 Tampa (813) 393-5011 GEORGIA Concord Component (770) 416-9597 HAWAII Brooks Technical (415) 960-3880 IDAHO ES/Chase (503) 684-8500 Brooks Technical (415) 960-3880 South: Competitive Tech. (602) 265-9224 HAMPSHIRE Kitchen Kutchin (617) 229-2660 JERSEY North: Associates (800) 645-5500 South: Vantage Sales (610) 272-2125 MEXICO Competitive Tech. (602) 265-9224 YORK NYC: Associates (516) 543-0510 Upstate: Tri-Tech Rochester (716) 385-6500 Binghamton (607) 722-3580 NORTH CAROLINA Concord Component (919) 846-3441 NORTH DAKOTA Case Associates (612) 831-6777 OHIO Midwest Marketing Assoc. Lyndhurst: (216) 381-8575 Dayton: (513) 433-2511 OKLAHOMA Southern States Marketing (214) 238-7500 OREGON ES/Chase (503) 684-8500
PENNSYLVANIA East: Vantage Sales (610) 272-2125 West: Midwest Marketing (216) 381-8575 RHODE ISLAND Kitchen Kutchin (617) 229-2660 SOUTH CAROLINA Concord Component (919) 846-3441 SOUTH DAKOTA Case Associates (612) 831-6777 TENNESSEE Concord Component (205) 772-8883 TEXAS Southern States Marketing Austin: (512) 835-5822 Dallas: (214) 238-7500 Houston: (713) 895-8533 UTAH Charles Fields Assoc. (801) 299-8228 VERMONT Kitchen Kutchin (617) 229-2660 VIRGINIA Chesapeake Tech. (301) 236-0530 WASHINGTON ES/Chase (206) 823-9535 WEST VIRGINIA Chesapeake Tech. (301) 236-0530 WISCONSIN Case Associates (612) 831-6777 WYOMING Technology Sales (303)692-8835
INTERNATIONAL
AUSTRALIA Dingley Electronics +61-3-9558-0444 Bayswater +61-3-9762-7644 CANADA J-Squared Technologies Ottawa (613) 592-9540 Toronto (905) 672-2030 Montreal (514) 747-1211 Vancouver (604) 473-4666 Calgary (403) 291-6755 EUROPE Britcomp Sales Surrey, England +44-1932 347077 +44-1932 346256 Munich, Germany +49-894488496 Athismons, France +33-1-69387678 interACTIVE Great Britain, Ireland +44-1773-740263 Ramtec Int'l B.V. Holland, Spain, Italy, Belgium, Hungary, Russia +31-2526-21222 HONG KONG Eastele Technology +852-2798-8860 INDIA Priya Electronics, Inc. Jose, (408) 954-1866 Satcom Sales Srvcs. +91-40-761-467 ISRAEL Eldis Technology +972-9-562-666
Alliance Semiconductor reserves right make changes this data sheet time improve design supply best product possible. Publication advance information does constitute committment produce supply product described. company cannot assume responsibility circuits shown represent that they free from patent infringement. Alliance products authorized critical components life support devices systems without express written approval president Alliance. ProMotion® Alliance logo registered trademarks Alliance Semiconductor Corporation. other trademarks property their respective holders.
ALLIANCE SEMICONDUCTOR
Printed U.S.A. 3099 North First Street Jose, 95134 (408) 383-4900 (408) 383-4999 Copyright 1995 rights reserved. March 1996

AS7C3256 AS7C3256L voltage CMOS SRAM Features Organization:

Top Searches for this datasheet

Other recent searches