BS62LV2006_06 Datasheet, PDF (2/11 Pages) Brilliance Semiconductor – Very Low Power CMOS SRAM 256K X 8 bit

n PIN DESCRIPTIONS
Name
A0-A17 Address Input
CE1 Chip Enable 1 Input
CE2 Chip Enable 2 Input
WE Write Enable Input
OE Output Enable Input
DQ0-DQ7 Data Input/Output
Ports
V_CC
GND
BS62LV2006
Function
These 18 address inputs select one of the 262,144 x 8-bit in the RAM
CE1 is active LOW and CE2 is active HIGH. Both chip enables must be active when
data read form or write to the device. If either chip enable is not active, the device is
deselected and is in 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 impendence state when OE is inactive.
There 8 bi-directional ports are used to read data from or write data into the RAM.
Power Supply
Ground
n TRUTH TABLE
MODE
CE1
CE2
WE
Not selected
H
X
X
(Power Down)
X
L
X
Output Disabled
L
H
H
Read
L
H
H
Write
L
H
L
OE
I/O OPERATION V_CC CURRENT
X
High Z
ICCSB, ICCSB1
X
H
High Z
ICC
L
DOUT
ICC
X
DIN
ICC
n ABSOLUTE MAXIMUM RATINGS ⁽¹⁾
n OPERATING RANGE
SYMBOL PARAMETER
VTERM
TBIAS
Terminal Voltage with
Respect to GND
Temperature Under
Bias
TSTG
Storage Temperature
PT
Power Dissipation
RATING UNITS
-0.5⁽²⁾ to 7.0
V
-40 to +125
O_C
-60 to +150
O_C
1.0
W
RANG
Commercial
Industrial
AMBIENT
TEMPERATURE
0^OC to + 70^OC
-40^OC to + 85^OC
VCC
2.4V ~ 5.5V
2.4V ~ 5.5V
n CAPACITANCE ⁽¹⁾ (T_A = 25^OC, f = 1.0MHz)
IOUT
DC Output Current
20
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.
2. –2.0V in case of AC pulse width less than 30 ns.
SYMBOL PAMAMETER CONDITIONS MAX. UNITS
CIN
Input
Capacitance
CIO
Input/Output
Capacitance
VIN = 0V
VI/O = 0V
6
pF
8
pF
1. This parameter is guaranteed and not 100% tested.
R0201-BS62LV2006
2
Revision 1.3
May.
2006