6-13
ST78C34
Rev. 3.00
Symbol Parameter Limits Units Conditions
Min Typ Max
AC ELECTRICAL CHARACTERISTICS
T
A
=0° - 70° C, Vcc=5.0 V ± 10% unless otherwise specified.
T1 Clock high pulse duration 50 ns
T2 Clock low pulse duration 50 ns External clock
T3 Clock rise/fall time 10 ns
T8 Chip select setup time 5 ns
T9 Chip select hold time 0 ns
T12 Data setup time 10 ns
T13 Data hold time 10 ns
T14 -IOW delay from chip select 10 ns
T15 -IOW strobe width 50 ns
T16 Chip select hold time from -IOW 0 ns
T17 Write cycle delay 55 ns
Tw Write cycle=T15+T17 105 ns
T19 Data hold time 10 ns
T21 -IOR delay from chip select 10 ns
T23 -IOR strobe width 65 ns
T24 Chip select hold time from -IOR 0 ns
T25 Read cycle delay 55 ns
Tr Read cycle=T23+T25 115 ns
T26 Delay from -IOR to data 35 ns 100 pF load
T39 -ACK pulse width 75 ns
T40 PD7 - PD0 setup time 10 ns
T41 PD7 - PD0 hold time 25 ns
T42 Delay from -ACK low to interrupt low 5 ns
T43 Delay from -IOR to reset interrupt 5 ns
