GM76C256C Series
Rev 03 / Apr. 2000 3
DC CHARACTERISTICS
Vcc = 5V ±10%, TA = 0°C to 70°C (Normal)/-25°C to 85°C (Extended), unless otherwise specified.
Symbol
Parameter Test Condition Min.
Typ.
Max.
Unit
ILI Input Leakage Current Vss < VIN < Vcc -1 - 1 uA
ILO Output Leakage Current Vss < VOUT < Vcc, /CS = VIH or
/OE = VIH or /WE = VIL -1 - 1 uA
Icc Operating Power Supply
Current /CS = VIL, VIN = VIH or VIL,
VIN = VIH or VIL, II/O = 0mA - - 10 mA
ICC1 Average Operating Current /CS = VIL, VIN = VIH or VIL,
Min. Duty Cycle = 100%, II/O = 0mA
- - 70 mA
ISB TTL Standby Current
(TTL Inputs) /CS= VIH
VIN = VIH or VIL - - 1 mA
ISB1 CMOS Standby Current /CS > Vcc - 0.2V, L - - 40 uA
(CMOS Inputs) VIN > Vcc - 0.2V or LL - - 20 uA
VIN < Vss + 0.2V LE - - 60 uA
LLE - - 30 uA
VOL Output Low Voltage IOL = 2.1mA - - 0.4 V
VOH Output High Voltage IOH = -1.0mA 2.4 - - V
Note : Typical values are at Vcc =5.0V, TA = 25°C
AC CHARACTERISTICS(I)
Vcc = 5V ±10%, TA = 0°C to 70°C (Normal) / -25°C to 85°C (Extended) unless otherwise specified.
-55 -70 -85 Min. Max.
Min. Max.
Min Max.
1 tRC Read Cycle Time 55 - 70 - 85 - ns
2 tAA Address Access Time - 55 - 70 - 85 ns
3 tACS Chip Select Access Time - 55 - 70 - 85 ns
4 tOE Output Enable to Output Valid - 30 - 35 - 45 ns
5 tCLZ Chip Select to Output in Low Z 10 - 10 - 10 - ns
6 tOLZ Output Enable to Output in Low Z 5 - 5 - 5 - ns
7 tCHZ Chip Disable to Output in High Z 0 20 0 30 0 30 ns
8 tOHZ Out Disable to Output in High Z 0 20 0 30 0 30 ns
9 tOH Output Hold from Address Change 5 - 5 - 5 - ns
10
tWC Write Cycle Time 55 - 70 - 85 - ns
11
tCW Chip Selection to End of Write 50 - 65 - 75 - ns
12
tAW Address Valid to End of Write 50 - 65 - 75 - ns
13
tAS Address Set-up Time 0 - 0 - 0 - ns
14
tWP Write Pulse Width 40 - 50 - 60 - ns
15
tWR Write Recovery Time 0 - 0 - 0 - ns
16
tWHZ Write to Output in High Z 0 20 0 25 0 30 ns
17
tDW Data to Write Time Overlap 25 - 30 - 40 - ns
18
tDH Data Hold from Write Time 0 - 0 - 0 - ns
19
tOW Output Active from End of Write 5 - 5 - 5 - ns
Symbol
Parameter
#
Unit