STC62WV256 Datasheet, PDF (2/10 Pages) List of Unclassifed Manufacturers – VERY LOW POWER/VOLTAGE CMOS SRAM

STC
„ PIN DESCRIPTIONS
Name
A0-A14 Address Input
CE Chip Enable Input
WE Write Enable Input
OE Output Enable Input
DQ0 – DQ7 Data Input/Output
Ports
Vcc
Gnd
STC62WV256
Function
These 15 address inputs select one of the 32768 x 8-bit words in the RAM
CE is active LOW. Chip enables must be active when data read from or write to the
device. If chip enable is not active, the device is deselected and is in a standby power
mode. The DQ pins will be in the high impedance state when the device is deselected.
The write enable input is active LOW and controls read and write operations. With the
chip selected, when WE is HIGH and OE is LOW, output data will be present on the
DQ pins; when WE is LOW, the data present on the DQ pins will be written into the
selected memory location.
The output enable input is active LOW. If the output enable is active while the chip is
selected and the write enable is inactive, data will be present on the DQ pins and they
will be enabled. The DQ pins will be in the high impedance state when OE is inactive.
These 8 bi-directional ports are used to read data from or write data into the RAM.
Power Supply
Ground
„ TRUTH TABLE
MODE
WE
CE
OE
Not selected
X
H
X
Output Disabled
H
L
H
Read
H
L
L
Write
L
L
X
I/O OPERATION
High Z
High Z
DOUT
DIN
Vcc CURRENT
I_CCSB, I_CCSB1
I_CC
I_CC
I_CC
„ ABSOLUTE MAXIMUM RATINGS⁽¹⁾
SYMBOL
VTERM
TBIAS
PARAMETER
Terminal Voltage with
Respect to GND
Temperature Under Bias
RATING
-0.5 to
Vcc+0.5
-40 to +125
TSTG
Storage Temperature
-60 to +150
PT
Power Dissipation
1.0
IOUT
DC Output Current
20
UNITS
V
O_C
O_C
W
mA
1. Stresses greater than those listed under ABSOLUTE MAXIMUM
RATINGS may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these
or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
reliability.
„ OPERATING RANGE
RANGE
Commercial
Industrial
AMBIENT
TEMPERATURE
0 ^O C to +70 ^O C
-40 ^O C to +85 ^O C
Vcc
2.4V ~ 5.5V
2.4V ~ 5.5V
„ CAPACITANCE ⁽¹⁾ (TA = 25^oC, f = 1.0 MHz)
SYMBOL
CIN
CDQ
PARAMETER
Input
Capacitance
Input/Output
Capacitance
CONDITIONS
VIN=0V
VI/O=0V
MAX.
6
8
UNIT
pF
pF
1. This parameter is guaranteed and not 100% tested.
R0201-STC62WV256
2
Revision 2.3
Jan. 2004