WCMA4016U4X Datasheet, PDF (9/12 Pages) Weida Semiconductor, Inc. – 256K x 16 Static RAM

WCMA4016U4X
Typical DC and AC Parameters
(Typical values are included for reference only and are not guaranteed or tested. Typical values are measured at V_CC = V_CC(typ.), T_A = 25°C.)
Operating Current vs. Supply Voltage Standby Current vs. Supply Voltage Access Time vs. Supply Voltage
14.0
12.0
12.0
60
10.0
10.0
50
8.0
(f = f_max)
6.0
4.0
2.0
(f = 1 MHz)
0.0
2.7 3.0 3.3
SUPPLY VOLTAGE (V)
8.0
6.0
4.0
2.0
0
2.7 3.0 ^3.3
SUPPLY VOLTAGE (V)
40
30
20
10
0
2.7 3.0 3.3
SUPPLY VOLTAGE (V)
Truth Table
CE WE
H
X
X
X
L
H
L
H
L
H
L
H
L
H
L
H
L
L
L
L
L
L
OE BHE BLE
Inputs/Outputs
Mode
X
X
X High Z
Deselect/Power-Down
X
H
H High Z
Deselect/Power-Down
L
L
L Data Out (I/O_O–I/O₁₅) Read
L
H
L Data Out (I/O_O–I/O₇); Read
I/O₈–I/O₁₅ in High Z
L
L
H Data Out (I/O₈–I/O₁₅); Read
I/O₀–I/O₇ in High Z
H
L
L High Z
Output Disabled
H
H
L High Z
Output Disabled
H
L
H High Z
Output Disabled
X
L
L Data In (I/O_O–I/O₁₅)
Write
X
H
L Data In (I/O_O–I/O₇);
Write
I/O₈–I/O₁₅ in High Z
X
L
H Data In (I/O₈–I/O₁₅);
Write
I/O₀–I/O₇ in High Z
Power
Standby (I_SB)
Standby (I_SB)
Active (I_CC)
Active (I_CC)
Active (I_CC)
Active (I_CC)
Active (I_CC)
Active (I_CC)
Active (I_CC)
Active (I_CC)
Active (I_CC)
9