MCM69D618 Datasheet, PDF (5/14 Pages) Motorola, Inc – 64K x 18 Bit Synchronous Dual I/O, Dual Address SRAM

TRUTH TABLE (See Notes 1 through 5)
Input at tn Clock
Operation Number
E1
E2
WX
WY
PTX
PTY
Operation
1
H
X
X
X
X
X
Deselected
2
X
L
X
X
X
X
Deselected
3
L
H
0
X
X
X
Write X Port
4
L
H
X
0
X
X
Write Y Port
5
L
H
X
X
0
X
Pass–Through X to Y
6
L
H
X
X
X
0
Pass–Through Y to X
7
L
H
1
X
1
1
Read X
8
L
H
X
1
1
1
Read Y
NOTES:
1. GX/GY must be controlled to avoid bus contention issues during write and pass–through cycles.
2. Operation numbers 3 – 6 can be used in any combination.
3. Operation numbers 4 and 7, 3 and 8, 7 and 8 can be combined.
4. Operation number 5 can not be combined with operation number 7 or 8 because pass–through takes precedence over a read operation.
5. Operation number 6 can not be combined with operation number 7 or 8 because pass–through takes precedence over a read operation.
tn
tn _{+ 1}
K
ADDRESS & CONTROL
VALID
DATA INPUT D
DATA OUTPUT Q
VALID
PASS–THROUGH
PIPELINED READ ACCESS
VALID
ABSOLUTE MAXIMUM RATINGS (See Note)
Rating
Symbol
Value
Unit
Power Supply Voltage
VDD
– 0.5 to + 4.6
V
Voltage Relative to VSS for Any Pin
Except VDD
Vin, Vout – 0.5 to VDD + 0.5 V
Output Current
Iout
± 20
mA
Power Dissipation
PD
TBD
W
Temperature Under Bias
Tbias
– 10 to + 85
°C
Operating Temperature
TA
0 to + 70
°C
Storage Temperature — Plastic
Tstg
– 55 to + 125
°C
NOTE: Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are
exceeded. Functional operation should be restricted to RECOMMENDED OPER-
ATING CONDITIONS. Exposure to higher than recommended voltages for extended
periods of time could affect device reliability.
This is a synchronous device. All synchro-
nous inputs must meet specified setup and hold
times with stable logic levels for ALL rising
edges of clock (K) while the device is selected.
This device contains circuitry to protect the
inputs against damage due to high static volt-
ages or electric fields; however, it is advised
that normal precautions be taken to avoid
application of any voltage higher than maxi-
mum rated voltages to these high–impedance
circuits.
MOTOROLA FAST SRAM
MCM69D618
5