August 2004
Copyright © Alliance Semiconductor. All rights reserved.
AS7C34096A
3.3V 512K × 8 CMOS SRAM
®
8/17/04, v. 2.1 Alliance Semiconductor P. 1 of 9
Features
• Pin compatible to AS7C34096
• Industrial and commercial temperature
• Organization: 524,288 words × 8 bits
• Center power and ground pins
• High speed
- 10/12/15/20 ns address access time
- 4/5/6/7 ns output enable access time
• Low power consum ption: ACTIVE
- 650 mW / max @ 10 ns
• Low power consumption: STANDBY
- 28.8 mW / max CMOS
• Equal access and cycle times
• Easy memory expansion with
CE
,
OE
inputs
• TTL-compatible, three-state I/O
• JEDEC standard packages
- 400 mil 36-pin SOJ
- 44-pin TSOP 2
• ESD protection ≥ 2000 volts
• Latch-up current ≥ 200 mA
Logic block diagram
524,288 × 8
Array
(4,194,304)
Sense amp
Input buffer
I/O8
I/O1
OE
CE
WE
Column decoder
Row decoder
Control
Circuit
A0
A1
A2
A3
A4
A5
A6
A7
V
CC
GND
A8
A10
A11
A12
A13
A14
A15
A16
A17
A18
A9
Pin arrangements
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
A15
OE
I/O8
I/O7
GND
V
CC
I/O6
I/O5
A14
A13
A12
A11
A10
NC
A0
A1
A2
A3
A4
CE
I/O1
I/O2
V
CC
GND
I/O3
I/O4
WE
A5
A6
A7 17
18
A8
A9
36
35
34
33
NC
A18
A17
A16
GND
V
CC
I/O6
I/O5
NC
A14
A13
A12
A11
A10
A4
CE
I/O1
I/O2
V
CC
GND
I/O3
I/O4
WE
A5
A6
A7
A8
A9
I/O8
I/O7
A1
A2
A3
A0
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
43
42
41
44
A16
A15
A17
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
2
3
4
1
NC
NC
NC
NC
NC
NC NC
NC
NC
OE
A18
36-pin SOJ (400 mil)
44-pin TSOP 2
Selection guide –10 –12 –15 –20 Unit
Maximum address access time 10 12 15 20 ns
Maximum outputenable access time 4 5 6 7 ns
Maximum operating current Industrial 180 160 140 110 mA
Commercial 170 150 130 100 mA
Maximum CMOS standby current 8 8 8 8 mA
®
AS7C34096A
8/17/04, v. 2.1 Alliance Semiconductor P. 2 of 9
Functional description
The AS7C34096A is a high-performance CMOS 4,194,304-bit Static Random Access Memory (SRAM) device organized as
524,288 words × 8 bits. It is designed for memory applications where fast data access, low power, and simple interfacing are
desired.
Equal address access and cycle times (tAA, tRC, tWC) of 10/12/15/20 ns with output enable access times (tOE) of 4/5/6/7 ns are
ideal for high-performance applications. The chip enable input CE permits easy memory expansion with multiple-bank memory
systems.
When CE is high the device enters standby mode. The device is guaranteed not to exceed 28.8mW power consumption in
CMOS standby mode.
A write cycle is accomplished by asserting write enable (WE) and chip enable (CE). Data on the input pins I/O1–I/O8 is written
on the rising edge of WE (write cycle 1) or CE (write cycle 2). To avoid bus contention, external devices should drive I/O pins
only after outputs have been disabled with out put enable (OE) or write enable (WE).
A read cycle is accomplished by asserting output enable (OE) and chip enable (CE), with write enable (WE) high. The chip
drives I/O pins with the data word referenced by the input address. When either chip enable or output enable is inactive, or write
enable is active, output drivers stay in high-impedance mode.
All chip inputs and outputs are TTL-compatible, and operation is from a single 3.3V supply voltage. This device is available as
per industry standard 400-mil 36-pin SOJ and 44-pin TSO P 2 packag es.
NOTE: Stresses greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and func-
tional operation of the device at these or any other conditions outside those indicated in the operational sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect reliability.
Key: X = Don’t care, L = Low, H = High
Absolute maximum ratings
Parameter Symbol Min Max Unit
Voltage on VCC relative to GND Vt1 –0.5 +5.0 V
Voltage on any pin relative to GND Vt2 –0.5 VCC +0.5 V
Power dissipation PD–1.0W
Storage temperature (plastic) Tstg –65 +150 °C
Temperature with VCC applied Tbias –55 +125 °C
DC current into output (low) IOUT –20mA
Truth table
CE WE OE Data Mode
H X X High Z Standby (ISB, ISB1)
L H H High Z Output disable (ICC)
LHL DOUT Read (ICC)
LLX DIN Write (ICC)
®
AS7C34096A
8/17/04, v. 2.1 Alliance Semiconductor P. 3 of 9
* VIL min = –1.0V for pulse width less than 5ns.
** VIH max = VCC + 2.0V for pulse width less than 5ns.
Recommended operating condition
Parameter Symbol Min Nominal Max Unit
Supply voltage VCC(10/12/15/20) 3.0 3.3 3.6 V
Input voltage VIH** 2.0 – VCC + 0.5 V
VIL* –0.5 – 0.8 V
Ambient operating
temperature commercial TA0– 70°C
industrial TA–40 – 85 °C
DC operating characteristics (over the operating range)1
Parameter Symbol Test conditions –10 –12 –15 –20 UnitMin Max Min Max Min Max Min Max
Input leakage
current |ILI|VCC = Max, VIN = GND to VCC –1–1–1–1µA
Output leakage
current |ILO|VCC = Max, CE = VIH
VOUT= GND to VCC –1–1–1–1µA
Operating power
supply current ICC VCC = Max, CE ≤ VIL
f = fMax, IOUT = 0mA
Industrial –180–160–140–110mA
Commercial - 170 - 150 - 130 - 100 mA
Standby power
supply current
ISB VCC = Max, CE ≥ VIH, f = fMax –60–60–60–60mA
ISB1
VCC = Max,
CE ≥ VCC – 0.2V,
VIN ≤ 0.2V or VIN ≥ VCC – 0.2V,
f = 0
–8–8–8–8mA
Output voltage VOL IOL = 8 mA, VCC = Min –0.4–0.4–0.4–0.4 V
VOH IOH = –4 mA, VCC = Min 2.4–2.4–2.4–2.4– V
Capacitance (f = 1MHz, Ta = 25° C, VCC = NOMINAL)2
Parameter Symbol Signals Test conditions Max Unit
Input capacitance CIN A, CE, WE, OE VIN = 0V 5 pF
I/O capacitance CI/O I/O VIN = VOUT = 0V 7 pF
®
AS7C34096A
8/17/04, v. 2.1 Alliance Semiconductor P. 4 of 9
Key to switching waveforms
Read waveform 1 (address controlled)3,6,7,9
Read waveform 2 (CE, OE controlled)3,6,8,9
Read cycle (over the operating range)3,9
Parameter Symbol –10 –12 –15 –20 Unit NotesMin Max Min Max Min Max Min Max
Read cycle time tRC 10–12–15–20–ns
Address access time tAA –10–12–15–20ns3
Chip enable (CE) access time tACE –10–12–15–20ns3
Output enable (OE) access time tOE –4–5–6–7ns
Output hold from address chang e tOH 3–3–3–3–ns5
CE Low to output in low Z tCLZ 3–3–3–3–ns4, 5
CE High to output in high Z tCHZ –5–6–7–9ns4, 5
OE Low to output in low Z tOLZ 0–0–0–0–ns4, 5
OE High to output in high Z tOHZ –5–6–7–9ns4, 5
Power up time tPU 0–0–0–0–ns4, 5
Power down time tPD –10–12–15–20ns4, 5
Undefined/don’t careFalling inputRising input
Address
D
OUT
Data valid
t
OH
t
AA
t
RC
current
Supply
OE
D
OUT
t
OE
t
OLZ
t
ACE
t
CHZ
t
CLZ
t
PU
t
PD
I
CC
I
SB
50% 50%
t
OHZ
Data valid
t
RC1
CE
®
AS7C34096A
8/17/04, v. 2.1 Alliance Semiconductor P. 5 of 9
Write waveform 1 (WE controlled)10
Write cycle (over the operating range)10
Parameter Symbol –10 –12 –15 –20 Unit NotesMin Max Min Max Min Max Min Max
Write cycle time tWC 10–12–15–20–ns
Chip enable (CE) to write end tCW 7 – 8 –10–12–ns
Address setup to write end tAW 7 – 8 –10–12–ns
Address setup time tAS 0–0–0–0–ns
Write pulse width (OE = high) tWP1 7 – 8 –10–12–ns
Write pulse width (OE = low tWP2 10–12–15–20–ns
Address hold from end of write tAH 0–0–0–0–ns
Write recovery time tWR 0–0–0–0–ns
Data valid to write end tDW 5–6–7–9–ns
Data hold time tDH 0–0–0–0–ns4, 5
Write enable to output in high Z tWZ 05060709ns4, 5
Output active from write end tOW 3–3–3–3–ns4, 5
t
AW
t
AH
t
WC
Address
WE
D
OUT
t
DH
t
OW
t
DW
t
WZ
t
WP
t
AS
Data valid
D
IN
t
WR
®
AS7C34096A
8/17/04, v. 2.1 Alliance Semiconductor P. 6 of 9
Write waveform 2 (CE controlled)10
AC test conditions
Notes
1During V
CC power-up, a pull-up resistor to VCC on CE is required to meet ISB specification.
2 This parameter is sampled, but not 100 % tested.
3 For test conditions, see AC Test Conditions.
4t
CLZ and tCHZ are specified with CL = 5pF as in Figure B. Transition is measured ±500 mV from steady-state voltage.
5 This parameter is guaranteed, but not tested.
6WE
is HIGH for read cycle.
7CE
and OE are LOW for read cycle.
8 Address valid prior to or coincident with CE transition Low.
9 All read cycle timings are referenced from the last valid address to the first transitioning address.
10 All write cycle timings are referenced from the last valid address to the first transitioning address.
11 C=30pF, except on High Z and Low Z parameters, where C=5pF.
t
AW
Address
CE
WE
D
OUT
t
CW
t
WP
t
DW
t
DH
t
AH
t
WZ
t
WC
t
AS
Data valid
D
IN
t
WR
350
Ω
C
11
320
Ω
D
OUT
GND
+3.3V
Figure B: 3.3V Output load
- Output load: see Figure B.
- Input pulse level: GND to 3.0V. See Figures A and B.
- Input rise and fall times: 2 ns. See Figure A.
- Input and output timing reference levels: 1.5V.
168
Ω
Thevenin equivalent:
D
OUT
+1.728V
10%
90%
10%
90%
GND
+3.0V
Figure A: Input pulse
2 ns
®
AS7C34096A
8/17/04, v. 2.1 Alliance Semiconductor P. 7 of 9
Package dimensions
44-pin TSOP 2
Min(mm) Max(mm)
A1.2
A10.05 0.15
A20.95 1.05
b0.30 0.45
c0.12 0.21
d18.31 18.52
E110.06 10.26
E11.68 11.94
e0.80 (typical)
L0.40 0.60
36-pin SOJ 400
Min(mils) Max(mils)
A0.128 0.148
A10.025 –
A20.105 0.115
b0.015 0.020
b10.026 0.032
c0.007 0.013
D.920 .930
e0.045 0.055
E0.370 BSC
E10.395 0.405
E20.435 0.445
d
E
1234567891011121314
4443424140393837363534333231
1516
3029
17181920
28272625
c
L
A
1
A
2
e
44-pin TSOP 2
0–5°
21
2423
E
1
A
b
Seating
Plane
22
D
Pin 1
e
E
1
E
2
A2
c
A1
b
b
1
A
E
36-pin SOJ
®
AS7C34096A
8/17/04, v. 2.1 Alliance Semiconductor P. 8 of 9
Note: Add suffix ‘N’ to t he above part number for Lead Free Parts. (Ex: AS7C34096A - 10 TIN)
Ordering codes
Package Temperature 10 ns 12 ns 15 ns 20 ns
SOJ Commercial AS7C34096A-10JC AS7C34096A-12JC AS7C34096A-15JC AS7C34096A-20JC
Industrial AS7C34096A-10JI AS7C34096A-12JI AS7C34096A-15JI AS7C34096A-20JI
TSOP 2 Com mercial AS7C34096A-10TC AS7C34096A-12TC AS7C34096A-15TC AS7C34096A-20TC
Industrial AS7C34096A-10TI AS7C34096A-12TI AS7C34096A-15TI AS7C34096A-20TI
Part numbering system
AS7C X 4096A –XX J orT X X
SRAM
prefix Voltage:
3 - 3.3V CMOS
Device
number Access time Packages:
J: SOJ 400 mil
T: TSOP 2
Temperature ranges:
C: Commercial, 0°C to 70°C
I: Industrial, –40°C to 85°C N=Lead Free Parts
Alliance Semiconductor Corporation
2575, Augustine Drive,
Santa Clara, CA 95054
Tel: 408 - 855 - 4900
Fax: 408 - 855 - 4999
www.alsc.com
Copyright © Alliance Semiconductor
All Rights Reserved
Part Number: AS7C34096A
Document Version: v. 2.1
© Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are trademarks or registered
trademarks of Alliance. All other brand and product names may be the trademarks of their respective companies. Alliance reserves the right to make
changes to this document and its products at any time without notice. Alliance assumes no responsibility for any errors that may appear in this document.
The data contained herein represents Alliance's best data and/or estimates at the time of issuance. Alliance reserves the right to change or correct this data at
any time, without notice. If the product described herein is under development, significant changes to these specifications are possible. The information in
this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any
guarantee or warrantee to any user or customer. Alliance does not assume any responsibility or liability arising out of the application or use of any product
described herein, and disclaims any express or implied warranties related to the sale and/or use of Alliance products including liability or warranties related
to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in Alliance's Terms and
Conditions of Sale (which are available from Alliance). All sales of Alliance products are made exclusively according to Alliance's Terms and Conditions of
Sale. The purchase of products from Alliance does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other
intellectual property rights of Alliance or third parties. Alliance does not authorize its products for use as critical components in life-supporting systems
where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of Alliance products in such life-
supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use.
AS7C34096A
®
®