MCM32257B View Datasheet(PDF) - Motorola => Freescale
Part Name
Description
Manufacturer
MCM32257B Datasheet PDF : 8 Pages
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TRUTH TABLE
Ex G W
H
X
X
L
H
H
L
L
H
L
X
L
Mode
Not Selected
Read
Read
Write
VCC Current
ISB1 or ISB2
ICCA
ICCA
ICCA
Output
High–Z
High–Z
Dout
Din
Cycle
—
—
Read Cycle
Write Cycle
ABSOLUTE MAXIMUM RATINGS (Voltages referenced to VSS = 0 V)
Rating
Symbol
Value
Unit
Power Supply Voltage
VCC
– 0.5 to 7.0
V
Voltage Relative to VSS
Vin, Vout – 0.5 to VCC + 0.5 V
Output Current (per I/O)
Iout
± 30
mA
Power Dissipation
PD
8.8
W
Temperature Under Bias
Tbias
– 10 to + 85
°C
Operating Temperature
TA
0 to + 70
°C
Storage Temperatrue
Tstg
– 25 to + 125
°C
NOTE: Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are
exceeded. Functional operation should be restricted to RECOMMENDED
OPERATING CONDITIONS. Exposure to higher than recommended voltages for
extended periods of time could affect device reliability.
The devices on this module contain circuitry
to protect the inputs against damage due to
high static voltages or electric fields; however,
it is advised that normal precautions be taken
to avoid application of any voltage higher than
maximum rated voltages to these high imped-
ance circuits.
These CMOS memory circuits have been
designed to meet the dc and ac specifications
shown in the tables, after thermal equilibrium
has been established. The module is in a test
socket or mounted on a printed circuit board
and transverse air flow of at least 500 linear
feet per minute is maintained.
DC OPERATING CONDITIONS AND CHARACTERISTICS
(VCC = 5.0 V ± 10%, TA = 0 to + 70°C, Unless Otherwise Noted)
RECOMMENDED OPERATING CONDITIONS (Voltages referenced to VSS = 0 V)
Parameter
Supply Voltage (Operating Voltage Range)
Input High Voltage
Input Low Voltage
* VIH (max) = VCC + 0.3 V dc; VIH (max) = VCC + 2 V ac (pulse width ≤ 20 ns)
** VIL (min) = – 3.0 V ac (pulse width ≤ 20 ns)
Symbol Min
Max
Unit
VCC
4.5
5.5
V
VIH
2.2 VCC + 0.3* V
VIL
– 0.5**
0.8
V
DC CHARACTERISTICS
Parameter
Symbol Min
Input Leakage Current (All Inputs, Vin = 0 to VCC)
Ilkg(I)
—
Output Leakage Current (G, Ex = VIH, Vout = 0 to VCC)
Ilkg(O)
—
AC Active Supply Current (G, Ex = VIL, Iout = 0 mA,
Cycle time ≥ tAVAV min)
MCM32257B–15: tAVAV = 15 ns ICCA
—
MCM32257B–20: tAVAV = 20 ns
—
MCM32257B–25: tAVAV = 25 ns
—
AC Standby Current (Ex = VIH, Cycle time ≥ tAVAV min)
ISB1
—
CMOS Standby Current (Ex ≥ VCC – 0.2 V, All Inputs ≥ VCC – 0.2 V or ≤ 0.2 V)
ISB2
—
Output Low Voltage (IOL = + 8.0 mA)
VOL
—
Output High Voltage (IOH = – 4.0 mA)
NOTE: Good decoupling of the local power supply should always be used.
VOH
2.4
Max
Unit
±8
µA
±8
µA
960
mA
880
840
320
mA
40
mA
0.4
V
—
V
CAPACITANCE (f = 1.0 MHz, dV = 3.0 V, TA = 25°C, Periodically Sampled Rather Than 100% Tested)
Characteristic
Symbol
Max
Unit
Input Capacitance
(All pins except DQ0 – DQ31 and E1 – E4)
Cin
(E1 – E4)
48
pF
14
Input/Output Capacitance
(DQ0 – DQ31) Cout
9
pF
MOTOROLA FAST SRAM
MCM32257B
6–3
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