Datasheet

SN54GTL16612, SN74GTL16612
18-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVERS
SCBS480K – JUNE 1994 – REVISED AUGUST 2001
2–20
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature, V
TT
= 1.2 V and V
REF
= 0.8 V for GTL (unless otherwise noted) (see Figure 1)
SN54GTL16612 SN74GTL16612
UNIT
MIN MAX MIN MAX
UNIT
f
clock
Clock frequency 95 95 MHz
t
Pulse duration
LEAB or LEBA high 3.3 3.3
ns
t
w
P
u
lse
d
u
ration
CLKAB or CLKBA high or low 5.6 5.6
ns
A before CLKAB↑ 1.3 1.3
B before CLKBA↑ 3.4 2.5
t
Setu
p
time
A before LEAB↓ 1.2 0
ns
t
su
Set
u
p
time
B before LEBA↓ 1 1
ns
CEAB before CLKAB↑ 2.1 2
CEBA before CLKBA↑ 2.6 2.2
A after CLKAB↑ 2.9 1.6
B after CLKBA↑ 4.1 0.3
t
h
Hold time
A after LEAB↓ 4.5 4
ns
t
h
Hold
time
B after LEBA↓ 4.3 3.6
ns
CEAB after CLKAB↑ 2 0.8
CEBA after CLKBA↑ 1.1 1.1
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, V
TT
= 1.2 V and V
REF
= 0.8 V for GTL (see Figure 1)
PARAMETER
FROM TO
SN54GTL16612 SN74GTL16612
UNIT
PARAMETER
(INPUT) (OUTPUT)
MIN TYP
†
MAX MIN TYP
†
MAX
UNIT
f
max
95 95 MHz
t
PLH
A
B
1 2.8 4.5 1.5 2.8 4.1
ns
t
PHL
A
B
1 2.5 4.5 1.3 2.5 4
ns
t
PLH
LEAB
B
1 3.6 5.5 2 3.6 5.3
ns
t
PHL
LEAB
B
1 3.5 6 1.9 3.5 5.4
ns
t
PLH
CLKAB
B
1 3.7 5.5 2.3 3.7 5.3
ns
t
PHL
CLKAB
B
1 3.4 5.5 1.9 3.4 5.4
ns
t
en
OEAB
B
1 3.3 5.5 2 3.3 5.5
ns
t
dis
OEAB
B
1 3.4 5.5 2 3.4 5.1
ns
t
r
Transition time, B outputs (0.5 V to 1 V) 1.3 1.3 ns
t
f
Transition time, B outputs (1 V to 0.5 V) 0.5 0.5 ns
t
PLH
B
A
2 4.1 6.9 2.1 4.1 6.3
ns
t
PHL
B
A
1 2.9 5.1 1.2 2.9 4.6
ns
t
PLH
LEBA
A
2 3.7 6.1 2.3 3.7 5.7
ns
t
PHL
LEBA
A
1 3 5.1 1.8 3 4.8
ns
t
PLH
CLKBA
A
2 3.8 6.4 2.5 3.8 6.1
ns
t
PHL
CLKBA
A
2 3.3 5.6 2.3 3.3 5.2
ns
t
en
OEBA
A
1 5 7.5 2.3 5 7.4
ns
t
dis
OEBA
A
2 4.3 6.9 2.5 4.3 6.4
ns
†
All typical values are at V
CC
(3.3 V) = 3.3 V, V
CC
(5 V) = 5 V, T
A
= 25°C.