Datasheet

SN74GTL1655
16-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVER
WITH LIVE INSERTION
SCBS696G – JULY 1997 – REVISED AUGUST 2001
2–8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage range, V
CC
, BIAS V
CC
–0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
(see Note 1): A-port and control inputs –0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . .
B port, V
ERC
, 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 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B port –0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state, I
O
: A port 48 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B port 200 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any A-port output in the high state, I
O
(see Note 2) 48 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) 55°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)
MIN NOM MAX UNIT
BIAS V
CC
Supply voltage 3 3.3 3.6 V
V
TT
Termination voltage
GTL 1.14 1.2 1.26
V
V
TT
Termination
v
oltage
GTL+ 1.35 1.5 1.65
V
V
REF
Reference voltage
GTL 0.74 0.8 0.87
V
V
REF
Reference
v
oltage
GTL+ 0.87 1 1.1
V
V
I
In
p
ut voltage
B port 0 V
TT
V
V
I
Inp
u
t
v
oltage
Except B port 0 V
CC
V
B port V
REF
+50 mV
V
IH
High-level input voltage
V
ERC
V
CC
–0.6 V
CC
V
Except B port and ERC 2
B port V
REF
–50 mV
V
IL
Low-level input voltage
V
ERC
GND 0.6
V
Except B port and ERC 0.8
I
IK
Input clamp current –18 mA
I
OH
High-level output current A port –24 mA
I
OL
Low level out
p
ut current
A port 24
mA
I
OL
Lo
w-
le
v
el
o
u
tp
u
t
c
u
rrent
B port 100
mA
∆t/∆V
CC
Power-up ramp rate 200 µs/V
T
A
Operating free-air temperature –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, BIAS V
CC
= 3.3 V second, and V
CC
= 3.3 V, I/O, control inputs, V
TT
and V
REF
(any order)
last. However, if the B-port I/O precharge is not required, the acceptable connection sequence is GND first and V
CC
= 3.3 V,
BIAS V
CC
= 3.3 V, I/O, control inputs, V
TT
and V
REF
(any order) last. When V
CC
is connected, the BIAS V
CC
circuitry is disabled.
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
.