Datasheet

SN74ABT18502
SCAN TEST DEVICE
WITH 18-BIT REGISTERED BUS TRANSCEIVER
SCBS753 – FEBRUARY 2002
25
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (normal mode) (see Figure 13)
MIN MAX UNIT
f
clock
Clock frequency CLKAB or CLKBA 0 100 MHz
t
Pulse duration
CLKAB or CLKBA high or low 3.5
ns
t
w
Pulse
duration
LEAB or LEBA high 3.5
ns
A before CLKAB↑ or B before CLKBA↑ 4
t
su
Setup time
A before LEAB↓ or B before LEBA↓
CLK high 3.5
ns
A
b
e
f
ore
LEAB↓
or
B
b
e
f
ore
LEBA↓
CLK low 2
t
h
Hold time
A after CLKAB↑ or B after CLKBA↑ 0
ns
t
h
Hold
time
A after LEAB↓ or B after LEBA↓ 2
ns
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (test mode) (see Figure 13)123
MIN MAX UNIT
f
clock
Clock frequency TCK 0 50 MHz
t
w
Pulse duration TCK high or low 8 ns
A, B, CLK, LE, or OE before TCK↑ 4.5
t
su
Setup time
TDI before TCK↑
7.5
ns
TMS before TCK↑ 3
A, B, CLK, LE, or OE after TCK↑ 0.5
t
h
Hold time
TDI after TCK↑
0.5
ns
TMS after TCK↑ 0.5
t
d
Delay time Power up to TCK↑ 50 ns
t
r
Rise time V
CC
power up 1 µs
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (normal mode) (see Figure 13)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 5 V,
T
A
= 25°C
MIN MAX UNIT
(INPUT)
(OUTPUT)
MIN TYP MAX
f
max
CLKAB or CLKBA 100 130 100 MHz
t
PLH
AorB
BorA
2 3.8 5.6 2 6
ns
t
PHL
A
or
B
B
or
A
2 3.8 5.6 2 6
ns
t
PLH
CLKAB or CLKBA
BorA
2.5 4.7 5.7 2.5 6
ns
t
PHL
CLKAB
or
CLKBA
B
or
A
2.5 4.7 5.7 2.5 6
ns
t
PLH
LEAB or LEBA
BorA
2.5 4.9 6.4 2.5 7
ns
t
PHL
LEAB
or
LEBA
B
or
A
2.5 4.9 6.5 2.5 7
ns
t
PZH
OEAB or OEBA
BorA
2 4.9 6.3 2 7
ns
t
PZL
OEAB
or
OEBA
B
or
A
2.5 5.6 7.2 2.5 8
ns
t
PHZ
OEAB or OEBA
BorA
3 6.1 7.8 3 8.8
ns
t
PLZ
OEAB
or
OEBA
B
or
A
2.5 4.8 6.5 2.5 7.3
ns