UT62257CPC-70LL(2001) 查看數據表（PDF） - Utron Technology Inc
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UT62257CPC-70LL Datasheet PDF : 12 Pages
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Rev. 1.0
UTRON
UT62257C
32K X 8 BIT LOW POWER CMOS SRAM
FEATURES
GENERAL DESCRIPTION
Access time : 35/70ns (max.)
Low power consumption:
Operating : 40 mA (typical.)
Standby : 3mA (typical) normal
2uA (typical) L-version
1uA (typical) LL-version
Single 5V power supply
All inputs and outputs are TTL compatible
Fully static operation
Three state outputs
Data retention voltage : 2V (min.)
Package : 28-pin 600 mil PDIP
28-pin 330 mil SOP
28-pin 8mmx13.4mm STSOP
FUNCTIONAL BLOCK DIAGRAM
The UT62257C is a 262,144-bit low power CMOS
static random access memory organized as
32,768 words by 8 bits. It is fabricated using high
performance, high reliability CMOS technology.
The UT62257C is designed for high-speed and
low power application. With 2 chip controls
( CE1、CE2 ), it is easy to design memory systems
with POWER-DOWN and capacity expansion in
the application circuits. It is particularly well suited
for battery back-up nonvolatile memory
application.
The UT62257C operates from a single 5V
power supply and all inputs and outputs are fully
TTL compatible.
A3
PIN CONFIGURATION
A4
A5
A6
.
ROW
A7
. DECODER
A8
.
A12
A13
A14
I/O1
...
... I/O
CONTROL
I/O8
...
MEMORY ARRAY
512 ROWS × 512 COLUMNS
. ..
COLUMN I/O
COLUMN DECODER
VCC
VSS
A14
1
A12
2
A7
3
A6
4
A5
5
A4
6
A3
7
A2
8
A1
9
A0
10
I/O1
11
I/O2
12
I/O3
13
Vss
14
28
Vcc
27
WE
26
A13
25
A8
24
A9
23
A11
22
CE2
21
A10
20
CE1
19
I/O8
18
I/O7
17
I/O6
16
I/O5
15
I/O4
PDIP/SOP
CE1
WE
CE2
LOGIC
CONTROL
A11 A10 A9 A2 A1 A0
CE2
1
A11
2
A9
3
A8
4
28
A10
27
CE1
26
I/O8
25
I/O7
PIN DESCRIPTION
SYMBOL
A0 - A14
I/O1 - I/O8
CE1、CE2
WE
VCC
VSS
DESCRIPTION
Address Inputs
Data Inputs/Outputs
Chip Enable Inputs
Write Enable Input
Power Supply
Ground
A13
5
WE
6
24
I/O6
23
I/O5
Vcc
7
22
I/O4
A14
8 UT62257C 21
Vss
A12
9
A7
10
A6
11
20
I/O3
19
I/O2
18
I/O1
A5
12
17
A0
A4
13
16
A1
A3
14
15
A2
STSOP
UTRON TECHNOLOGY INC.
1F, No. 11, R&D Rd. II, Science-Based Industrial Park, Hsinchu, Taiwan, R. O. C.
TEL: 886-3-5777882 FAX: 886-3-5777919
1
P80062
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