MX66C256 Datasheet, PDF (1/9 Pages) Macronix International – Very Low Power 32k x 8 CMOS SRAM

MX66C256
Very Low Power 32k x 8 CMOS SRAM
FEATURES
Vcc operation voltage : 5.0V
Very low power consumption :
50 mA (Max.) write current
40 mA (Max.) read current
0.4uA (Typ.) CMOS standby current
High speed access time :
- 70
70ns (Max.)
- 100 100ns (Max.)
Input levels are CMOS-compatible
Automatic power down when chip is deselected
Three state outputs
Fully static operation
Data retention supply voltage as low as 2.0V
Easy expansion with CE and OE options
DESCRIPTION
The MX66C256 is a high performance, very low power
CMOS Static Random Access Memory organized as
32,768 words by 8 bits and operates at 5.0V supply
voltage.
Advanced CMOS technology and circuit techniques
provide both high speed and low power features with a
typical CMOS standby current of 0.4uA and maximum
access time of 70ns and 100 ns in 5V operation.
Easy memory expansion is provided by an active LOW
chip enable(CE), and active LOW output enable (OE)
and three-state output drivers.
The MX66C256 has an automatic power down feature,
reducing the power consumption significantly when chip
is deselected.
The MX66C256 is available in the JEDEC standard 28
pin 330mil Plastic SOP, and 8mmx13.4mm TSOP
(normal type).
PIN CONFIGURATIONS
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
1
28
2
27
3
26
4
25
5
24
6
23
7
22
8 28-SOP 21
9
20
10
19
11
18
12
17
13
16
14
15
VCC
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
OE 1
A11 2
A9 3
A8 4
A13 5
WE 6
VCC 7
A14 8
A12 9
A7 10
A6 11
A5 12
A4 13
A3 14
28-TSOP
28 A10
27 CE
26 DQ7
25 DQ6
24 DQ5
23 DQ4
22 DQ3
21 GND
20 DQ2
19 DQ1
18 DQ0
17 A0
16 A1
15 A2
BLOCK DIAGRAM
A5
A6
A7
A12
A14
Address
18
Row
Input
512
A13
A8
Buffer
Decoder
A9
A11
DQ0
DQ1
8
Data
Input
8
DQ2
Buffer
DQ3
DQ4
8
DQ5
DQ6
8
Data
Output
Buffer
DQ7
Memory Array
512 x 512
512
Column I/O
Write Driver
Sense Amp
64
Column Decoder
CE
WE
Control
OE
Vdd
Gnd
12
Address Input Buffer
A4 A3 A2 A1 A0 A10
P/N DS0035
1
Macronix America Inc. USA 1338 Ridder Park Dr., San Jose, CA 95131
Tel [phone] Fax [phone] www.macronix.com
Rev. 1.1, Jan., 2000