28C16A
TABLE 1-3:
READ OPERATION AC CHARACTERISTICS
AC Testing Waveform:
Output Load:
VIH = 2.4V; VIL = 0.45V; VOH = 2.0V; Vol = 0.8V
1 TTL Load + 100pF
Input Rise and Fall Times: 20 ns
Ambient Temperature:
Commercial (C): Tamb = 0˚C to +70˚0˚C
Industrial (I):
Tamb = -40˚C to +85˚C
28C16A-15
Sym
28C16A-20
28C16A-25
Parameter
Units
Conditions
Min
Max
Min
Max
Min
Max
Address to Output Delay
CE to Output Delay
tACC
tCE
—
—
—
0
150
150
70
—
—
—
0
200
200
80
—
—
—
0
250
250
100
70
ns
ns
ns
ns
ns
OE = CE = VIL
OE = VIL
OE to Output Delay
tOE
CE = VIL
CE or OE High to Output Float
tOFF
tOH
50
55
Output Hold from CE or OE,
whichever occurs first
0
—
0
—
0
—
Endurance
—
1M
—
1M
—
1M
—
cycles 25°C, Vcc =
5.0V, Block
Mode (Note)
Note: This parameter is not tested but guaranteed by characterization. For endurance estimates in a specific appli-
cation, please consult the Total Endurance Model which can be obtained on our BBS or website.
FIGURE 1-1: READ WAVEFORMS
VIH
Address
CE
Address Valid
VIL
VIH
VIL
tCE(2)
VIH
VIL
OE
tOFF(1,3)
tOH
tOE(2)
VOH
High Z
High Z
Data
WE
Valid Output
VOL
VIH
VIL
tACC
Notes: (1) tOFF is specified for OE or CE, whichever occurs first
(2) OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE
(3) This parameter is sampled and is not 100% tested
1996 Microchip Technology Inc.
DS11125G-page 3