Datasheet

SN74ABT18502
SCAN TEST DEVICE
WITH 18-BIT REGISTERED BUS TRANSCEIVER
SCBS753 – FEBRUARY 2002
26
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (test mode) (see Figure 13)1234
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 5 V,
T
A
= 25°C
MIN MAX UNIT
(INPUT)
(OUTPUT)
MIN TYP MAX
f
max
TCK 50 90 50 MHz
t
PLH
TCK↓
AorB
2.5 9.1 11.4 2.5 13.5
ns
t
PHL
TCK↓
A
or
B
2.5 9.1 10.8 2.5 12.4
ns
t
PLH
TCK↓
TDO
2 3.8 5.1 2 5.6
ns
t
PHL
TCK↓
TDO
2 3.8 5.3 2 6
ns
t
PZH
TCK↓
AorB
4.5 9.5 11.5 4.5 13.4
ns
t
PZL
TCK↓
A
or
B
5 10.1 12.2 5 14
ns
t
PZH
TCK↓
TDO
2.5 4.6 5.9 2.5 6.8
ns
t
PZL
TCK↓
TDO
3 5.2 6.8 3 7.5
ns
t
PHZ
TCK↓
AorB
4 11.6 14.3 4 16.3
ns
t
PLZ
TCK↓
A
or
B
3.5 11.1 13.6 3.5 15.3
ns
t
PHZ
TCK↓
TDO
3 5.3 7.2 3 7.6
ns
t
PLZ
TCK↓
TDO
3 5.2 6.8 3 7.6
ns