AC CHARACTERISTICS READ CYCLE1,2
(VDD = 5.0V±10%)
7C138 - 45
7C139 - 45
7C138 - 55
7C139 - 55
MIN MAX
SYMBOL
PARAMETER
UNIT
MIN
MAX
tRC
tAA
Read cycle time
45
5
55
55
5
ns
ns
ns
ns
ns
ns
Address to data valid2
45
tOHA
tACE
tDOE
Output hold from address change
CE LOW to data valid2
OE LOW to data valid2
OE LOW to low Z
45
20
55
20
0
0
0
tLZOE
tHZOE
tLZCE
tHZCE
OE HIGH to high Z
CE LOW to low Z
CE HIGH to high Z
20
20
20
ns
ns
ns
0
20
Notes:
1. Test conditions assume signal transition time of 5ns or less, timing reference levels of V /2, input pulse levels of 0.5V to V -0.5V, and output
DD
DD
loading of the specified I /I and 50-pF load capacitance.
OL OH
2. AC test conditions use V /V =V /2 + 500mV.
OH OL
DD
7
AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
