Datasheet

SN54GTL16612, SN74GTL16612
18-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVERS
SCBS480K – JUNE 1994 – REVISED AUGUST 2001
2–18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage range, V
CC
: 3.3 V –0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 V –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
(see Note 1): A-port and control inputs –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . .
B port and V
REF
–0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high or power-off state, V
O
(see Note 1): A port –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B port –0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state, I
O
: A port 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B port 80 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any A-port output in the high state, I
O
(see Note 2) 64 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through each V
CC
or GND ±100 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
JA
(see Note 3): DGG package 64°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL package 56°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. This current flows only when the output is in the high state and V
O
> V
CC
.
3. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Notes 4 through 7)
SN54GTL16612 SN74GTL16612
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
V
CC
Su
pp
ly voltage
3.3 V 3.15 3.3 3.45 3.15 3.3 3.45
V
V
CC
S
u
ppl
y v
oltage
5 V 4.75 5 5.25 4.75 5 5.25
V
V
TT
Termination
GTL 1.14 1.2 1.26 1.14 1.2 1.26
V
V
TT
voltage
GTL+
1.35 1.5 1.65 1.35 1.5 1.65
V
V
REF
Reference voltage
GTL 0.74 0.8 0.87 0.74 0.8 0.87
V
V
REF
Reference
v
oltage
GTL+ 0.87 1 1.1 0.87 1 1.1
V
V
I
In
p
ut voltage
B port V
TT
V
TT
V
V
I
Inp
u
t
v
oltage
Except B port 5.5 5.5
V
V
IH
High-level
B port V
REF
+50 mV V
REF
+50 mV
V
V
IH
g
input voltage
Except B port
2 2
V
V
IL
Low-level
B port V
REF
–50 mV V
REF
–50 mV
V
V
IL
input voltage
Except B port
0.8 0.8
V
I
IK
Input clamp current –18 –18 mA
I
OH
High-level
output current
A port –32 –32 mA
I
OL
Low-level
A port 64 64
mA
I
OL
output current
B port
40 40
mA
T
A
Operating free-air temperature –55 125 –40 85 °C
NOTES: 4. All unused inputs of the device must be held at V
CC
or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs , literature number SCBA004.
5. Normal connection sequence is GND first, V
CC
= 5 V second, and V
CC
= 3.3 V, I/O, control inputs, V
TT
and V
REF
(any order) last.
6. V
TT
and R
TT
can be adjusted to accommodate backplane impedances if the dc recommended I
OL
ratings are not exceeded.
7. V
REF
can be adjusted to optimize noise margins, but normally is two-thirds V
TT
.