STC
FEATURES
Very Low Power/Voltage CMOS SRAM
32K X 8 bit
DESCRIPTION
STC62WV256
鈥?Wide Vcc operation voltage : 2.4V ~ 5.5V
鈥?Very low power consumption :
Vcc = 3.0V C-grade : 20mA (Max.) operating current
I- grade : 25mA (Max.) operating current
0.01uA (Typ.) CMOS standby current
Vcc = 5.0V C-grade : 35mA (Max.) operating current
I- grade : 40mA (Max.) operating current
0.4uA (Typ.) CMOS standby current
鈥?High speed access time :
-70
70ns (Max.) at Vcc=3.0V
鈥?Automatic power down when chip is deselected
鈥?Three state outputs and TTL compatible
鈥?Fully static operation
鈥?Data retention supply voltage as low as 1.5V
鈥?Easy expansion with CE and OE options
The
STC62WV256
is a high performance , very low power CMOS
Static Random Access Memory organized as 32,768 words by 8 bits
and operates from a wide range of 2.4V to 5.5V supply voltage.
Advanced CMOS technology and circuit techniques provide both high
speed and low power features with a typical CMOS standby current of
0.01uA and maximum access time of 70ns in 3V operation.
Easy memory expansion is provided by active LOW chip enable (CE),
active LOW output enable (OE) and three-state output drivers.
The
STC62WV256
has an automatic power down feature, reducing the
power consumption significantly when chip is deselected.
The
STC62WV256
is available in the DICE form, JEDEC standard 28pin
330mil Plastic SOP, 300mil Plastic SOJ, 600mil Plastic DIP and 8mm x
13.4mm TSOP (normal type).
PRODUCT FAMILY
PRODUCT
FAMILY
OPERATING
TEMPERATURE
Vcc
RANGE
SPEED
(ns)
Vcc=
3.0V
POWER DISSIPATION
STANDBY
Operating
(I
CCSB1
, Max)
Vcc=
Vcc=
5.0V
3.0V
(I
CC
, Max)
Vcc=
Vcc=
5.0V
3.0V
PKG
TYPE
SOP-28
TSOP-28
PDIP-28
SOJ-28
DICE
SOP-28
TSOP-28
PDIP-28
SOJ-28
DICE
STC62WV256SC
STC62WV256TC
O
O
STC62WV256PC
0 C to +70 C
STC62WV256JC
STC62WV256DC
STC62WV256SI
STC62WV256TI
O
O
STC62WV256PI
-40 C to +85 C
STC62WV256JI
STC62WV256DI
2.4V ~ 5.5V
70
1uA
0.2uA
35mA
20mA
2.4V ~ 5.5V
70
2uA
0.4uA
40mA
25mA
PIN CONFIGURATIONS
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
62WV256SC
62WV256SI
62WV256PC
62WV256PI
62WV256JC
62WV256JI
28
27
26
25
24
23
22
21
20
19
18
17
16
15
BLOCK DIAGRAM
VCC
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
8
Data
Input
Buffer
8
A5
A6
A7
A12
A14
A13
A8
A9
A11
Buffer
鈥?/div>
Address
Input
18
Row
Decoder
512
Memory Array
512 x 512
512
Column I/O
Write Driver
Sense Amp
64
Column Decoder
12
CE
WE
OE
Vdd
Gnd
A4 A3 A2 A1 A0 A10
Control
Address Input Buffer
OE
A11
A9
A8
A13
WE
VCC
A14
A12
A7
A6
A5
A4
A3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
STC62WV256TC
STC62WV256TI
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
GND
DQ2
DQ1
DQ0
A0
A1
A2
8
Data
Output
Buffer
8
STC International Limited
.
reserves the right to modify document contents without notice.
R0201-STC62WV256
鈥?/div>
1
Revision 2.3
Jan.
2004
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