Datasheet

SN74GTLPH16612
18-BIT LVTTL-TO-GTLP UNIVERSAL BUS TRANSCEIVER
SCES326C – MARCH 2000 – REVISED AUGUST 2001
3–218
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature, V
TT
= 1.5 V and V
REF
= 1 V for GTLP (unless otherwise noted) (see Figure 1)
MIN MAX UNIT
f
clock
Clock frequency 85 MHz
LEAB or LEBA high 3.3
t
w
Pulse duration
CLKAB or CLKBA high or low
5.7
ns
A before CLKAB↑ 1
B before CLKBA↑ 1.8
A before LEAB↓ 0.5
t
su
Setup time
B before LEBA↓
1.2
ns
CEAB before CLKAB↑ 1.2
CEBA before CLKBA↑ 1.4
A after CLKAB↑ 1.9
B after CLKBA↑ 0.5
A after LEAB↓ 2.7
t
h
Hold time
B after LEBA↓
3.5
ns
CEAB after CLKAB↑ 1.2
CEBA after CLKBA↑ 1.1
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, V
TT
= 1.5 V and V
REF
= 1 V for GTLP (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN TYP
†
MAX UNIT
f
max
85 MHz
t
PLH
2.5 6.9
t
PHL
A B
2.5 6.9
ns
t
PLH
3.2 7.3
t
PHL
LEAB B
3.2 7.3
ns
t
PLH
3.4 7.8
t
PHL
CLKAB B
3.4 7.8
ns
t
en
2.8 7
t
dis
OEAB
B
2.8 7
ns
t
r
Transition time, B outputs (20% to 80%) 2.6 ns
t
f
Transition time, B outputs (80% to 20%) 2.6 ns
t
PLH
1.5 5.7
t
PHL
B A
1.5 5.7
ns
t
PLH
1.8 5.7
t
PHL
LEBA A
1.8 5.7
ns
t
PLH
2.3 5.5
t
PHL
CLKBA A
2.3 5.5
ns
t
en
1.8 6.1
t
dis
OEBA
A
1.8 6.1
ns
†
All typical values are at V
CC
(3.3 V) = 3.3 V, V
CC
(5 V) = 5 V, T
A
= 25°C.