SN74LVC161284
19-BIT BUS INTERFACE
SCAS583I – NOVEMBER 1996 – REVISED MARCH 1999
D
1.4-kΩ Pullup Resistors Integrated on All
Open-Drain Outputs Eliminate the Need for
Discrete Resistors
D
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D
Designed for the IEEE Std 1284-I (Level 1
Type) and IEEE Std 1284-II (Level 2 Type)
Electrical Specifications
D
Flow-Through Architecture Optimizes PCB
Layout
D
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) and Thin-Shrink
Small-Outline (DGG) Packages
description
The SN74L VC161284 is designed for 3-V to 3.6-V
V
operation. This device provides
CC
asynchronous two-way communication between
data buses. The control-function implementation
minimizes external timing requirements.
This device has eight bidirectional bits; data can
flow in the A-to-B direction when DIR is high, and
in the B-to-A direction when DIR is low. This
device also has five drivers, which drive the cable
side, and four receivers. The SN74LVC161284
has one receiver dedicated to the HOST LOGIC
line and a driver to drive the PERI LOGIC line.
DGG OR DL PACKAGE
HD
A9
A10
A1 1
A12
A13
V
CC
A1
A2
GND
A3
A4
A5
A6
GND
A7
A8
V
PERI LOGIC IN
HOST LOGIC OUT
CC
A14
A15
A16
A17
(TOP VIEW)
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
41
9
40
10
39
11
38
12
37
13
36
14
35
15
34
16
33
17
32
18
31
19
30
20
29
21
28
22
27
23
26
24
25
DIR
Y9
Y10
Y11
Y12
Y13
CABLE
V
CC
B1
B2
GND
B3
B4
B5
B6
GND
B7
B8
CABLE
V
CC
PERI LOGIC OUT
C14
C15
C16
C17
HOST LOGIC IN
The output drive mode is determined by the high-drive (HD) control pin. When HD is high, the outputs are in
a totem-pole configuration, and in an open-drain configuration when HD is low. This meets the drive
requirements as specified in the IEEE Std 1284-I (level 1 type) and IEEE Std 1284-II (level 2 type) parallel
peripheral-interface specifications. Except for HOST LOGIC IN and PERI LOGIC OUT , all cable-side pins have
a 1.4-kΩ integrated pullup resistor. The pullup resistor is switched of f if the associated output driver is in the low
state or if the output voltage is above V
The device has two supply voltages. V
CABLE. If VCC CABLE is off, PERI LOGIC OUT is set to low.
CC
is designed for 3-V to 3.6-V operation. VCC CABLE supplies the inputs
CC
and output buffers of the cable side only and is designed for 3-V to 3.6-V and for 4.7-V to 5.5-V operation. Even
when V
CABLE is 3 V to 3.6 V, the cable-side I/O pins are 5-V tolerant.
CC
The SN74LVC161284 is characterized for operation from 0°C to 70°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright 1999, Texas Instruments Incorporated
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
1
SN74LVC161284
OUTPUT
MODE
L
L
H
L
19-BIT BUS INTERFACE
SCAS583I – NOVEMBER 1996 – REVISED MARCH 1999
FUNCTION TABLE
INPUTS
DIR
logic diagram
HD
Open drain A9–A13 to Y9–Y13 and PERI LOGIC IN to PERI LOGIC OUT
Totem pole B1–B8 to A1–A8 and C14–C17 to A14–A17
L H Totem pole B1–B8 to A1–A8, A9–A13 to Y9–Y13, PERI LOGIC IN to PERI LOGIC OUT , and C14–C17 to A14–A17
Open drain A1–A8 to B1–B8, A9–A13 to Y9–Y13, and PERI LOGIC IN to PERI LOGIC OUT
Totem pole C14–C17 to A14–A17
H H Totem pole A1–A8 to B1–B8, A9–A13 to Y9–Y13, C14–C17 to A14–A17, and PERI LOGIC IN to PERI LOGIC OUT
VCC CABLE
DIR
HD
A1–A8
A9–A13
PERI LOGIC IN
42
48
1
19
See Note B
See Note B
See Note A
B1–B8
Y9–Y13
30
PERI LOGIC OUT
A14–A17
HOST LOGIC OUT
NOTES: A. The PMOS transistor prevents backdriving current from the signal pins to VCC CABLE when VCC CABLE is open or at GND.
B. The PMOS transistors prevent backdriving current from the signal pins to VCC CABLE when VCC CABLE is open or at GND. The
PMOS transistor is turned off when the associated driver is in the low state.
2
24
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
C14–C17
25
HOST LOGIC IN
VIHHigh-level input voltage
V
VILLow-level input voltage
V
VIInput voltage
V
SN74LVC161284
19-BIT BUS INTERFACE
SCAS583I – NOVEMBER 1996 – REVISED MARCH 1999
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range: V
Input and output voltage range, V
Input clamp current, I
Output clamp current, I
Continuous output current, I
CABLE –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
V
–0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
and VO: Cable side (see Notes 1 and 2) –2 V to 7 V. . . . . . . . . . . . . . . . . .
I
Peripheral side (see Note 1) –0.5 V to V
(VI < 0) –20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IK
(VO < 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OK
: Except PERI LOGIC OUT ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O
CC
†
+ 0.5 V. . . . . . . . . . .
PERI LOGIC OUT ±100 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through each V
Output high sink current, I
Package thermal impedance, θ
(VO = 5.5 V and VCC CABLE = 3 V) 65 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SK
JA
or GND ±200 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
(see Note 3): DGG package 89°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL package 94°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
†
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 voltage ratings may be exceeded if the input and output current ratings are observed.
2. The ac input voltage pulse duration is limited to 40 ns if the amplitude is greater than –0.5 V.
3. The package thermal impedance is calculated in accordance with JESD 51.
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
recommended operating conditions (see Note 4)
MIN MAX UNIT
VCC CABLE Supply voltage for the cable side, VCC CABLE ≥ V
V
CC
V
O
I
OH
I
OL
T
A
NOTE 4: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Supply voltage 3 3.6 V
p
p
p
Open-drain output voltage HD low 0 5.5 V
High-level output current
Low-level output current
Operating free-air temperature 0 70 °C
Implications of Slow or Floating CMOS Inputs
, literature number SCBA004.
CC
A, B, DIR, and HD 2
C14–C17 2.3
HOST LOGIC IN 2.6
PERI LOGIC IN 2
A, B, DIR, and HD 0.8
C14–C17 0.8
HOST LOGIC IN 1.6
PERI LOGIC IN 0.8
Peripheral side 0 V
Cable side 0 5.5
HD high, B and Y outputs –14
A outputs and HOST LOGIC OUT
PERI LOGIC OUT –0.5
B and Y outputs 14
A outputs and HOST LOGIC OUT
PERI LOGIC OUT 84
3 5.5 V
CC
mA
–4
mA
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
SN74LVC161284
HD high, B and Y outputs
I
mA
V
g, ,
V
PERI LOGIC OUT
I
mA
VOLA outputs and HOST LOGIC OUT
V
C inputs
B outputs
I
I
V
V
V
0 V
A
I
¶
mA
19-BIT BUS INTERFACE
SCAS583I – NOVEMBER 1996 – REVISED MARCH 1999
electrical characteristics over recommended operating free-air temperature range,
CABLE = 5 V (unless otherwise noted)
V
CC
PARAMETER TEST CONDITIONS V
V
– V
thH
∆V
OH
I
I
OZ
off
CC
C
i
C
io
Z
O
R pullup Cable side VO = 0 V (in Hi Z) 3.3 V 1.15 1.65 kΩ
†
Typical values are measured at VCC = 3.3 V, VCC CABLE = 5 V, and TA = 25°C.
‡
VCC CABLE = 4.7 V
§
VCC CABLE = 3.6 V
¶
A maximum current of 170 µA per pin is added to ICC if the pullup resistor pin is above VCC.
Input hysteresis
t
p
HD high, A outputs, and
HOST LOGIC OUT
B and Y outputs IOL = 14 mA 3 V 0.77
p
PERI LOGIC OUT IOL = 84 mA 3 V 0.8
p
All inputs except the B or C inputs VI = VCC or GND 3.6 V ±1 µA
p
A1–A8 VO = VCC or GND 3.6 V ±20 µA
Open-drain Y outputs VO = GND (pullup resistors) 3.6 V
Leakage to GND, B and Y outputs
Leakage to VCC, B and Y outputs
Control inputs VI = VCC or GND 3.3 V 3 4 pF
All inputs VO = VCC or GND 3.3 V 7 15 pF
Cable side IOH = –35 mA 3.3 V 45 Ω
C inputs and HOST LOGIC IN
V
thH
V
thH
OH
IOH = –4 mA 3 V 2.4
IOH = –50 µA 3 V 2.8
OH
IOL = 50 µA 3 V 0.2
IOL = 4 mA 3 V 0 4
VI = V
VI = GND (pullup resistors) 3.6 V
VO = V
VO = GND (pullup resistors) 3.6 V
or
I
VI = VCC, IO = 0 3.6 V 0.8
VI = GND (12 × pullup) 3.6 V 45
for all inputs except the
thL
– V
for the HOST LOGIC IN 3.3 V 0.2
thL
– V
for the C inputs 3.3 V 0.8
thL
= –14
= –0.5
CC
CC
= 0 to 7
O
CC
3.3 V 0.4
3.3 V
3.15 V 3.1
3.3 V
3.6 V
3.6 V 20 µA
MIN TYP†MAX UNIT
3 V 2.23
‡
2.4
‡
4.5
w
w
w
w
V
50 µA
–3.5 mA
–3.5 mA
–3.5 mA
100
µ
10
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Totem pole
A or B
B or A
ns
t
DIR
ns
SN74LVC161284
19-BIT BUS INTERFACE
SCAS583I – NOVEMBER 1996 – REVISED MARCH 1999
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figures 1 and 2)
PARAMETER
t
PLH
t
PHL
t
slew
t
en
t
dis
ten–t
dis
t
en
dis
tr, t
f
‡
t
sk(o)
†
Typical values are measured at VCC = 3.3 V, VCC CABLE = 5 V, and TA = 25°C.
‡
Skew is measured at 1/2 (VOH + VOL) for signals switching in the same direction.
p
Totem pole Cable-side outputs 0.05 0.4 V/ns
Totem pole
Totem pole
Open drain
FROM
(INPUT)
HD
HD
DIR
A
A or B
B, Y, and PERI LOGIC OUT 1 25 ns
B, Y, and PERI LOGIC OUT 1 25 ns
TO
(OUTPUT)
A 1 50 ns
A 1 15
B 1 50
B or Y 120 ns
B or A 2.5 10 ns
MIN TYP†MAX UNIT
1 40
1 40
1 10 ns
operating characteristics, V
C
Power dissipation capacitance Outputs enabled CL = 0, f = 10 MHz 45 pF
pd
= 3.3 V, T
CC
PARAMETER
= 25°C
A
TEST CONDITIONS TYP UNIT
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
5
SN74LVC161284
19-BIT BUS INTERFACE
SCAS583I – NOVEMBER 1996 – REVISED MARCH 1999
PARAMETER MEASUREMENT INFORMATION
V
CC
62 Ω
CL = 50 pF
(see Note A)
Input
(see Note B)
1.4 V
t
w
2.7 V
1.4 V
0 V
B or Y Output
From
Under Test
B or Y Output
TP1
From
62 Ω
Sink Load
t
PHL
t
PLH
Source Load
V
TP1
t
PLH
Output
(see Note B)
CL = 50 pF
(see Note A)
SLEW RATE A-TO-B OR A-TO-Y LOAD (Totem Pole)
CC
(see Note C)
500 Ω
Output
CL = 50 pF
(see Note A)
(see Note C)
VOLTAGE WAVEFORMS MEASURED AT TP1
PROPAGATION DELAY TIMES (A to B)
Input
VOLTAGE WAVEFORMS MEASURED AT TP1, B SIDE
1.4 V
2 V 2 V
0.8 V 0.8 V
VOL + 1.4 V
t
r
1.4 V
t
PHL
VOH – 1.4 V
t
f
V
OH
V
OL
2.7 V
0 V
V
OH
V
OL
A-TO-B LOAD OR A-TO-Y LOAD (Open Drain)
NOTES: A. CL includes probe and jig capacitance.
B. Input rise and fall times are 3 ns, 150 ns < pulse duration < 10 µs for both low-to-high and high-to-low transitions.
Slew rate is measured between 0.4 V and 0.9 V for the rising edge and between 2.4 V and 1.9 V for the falling edge.
C. Input rise and fall times are 3 ns. Rise and fall times (open drain) < 120 ns.
D. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuits and Voltage Waveforms
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
From Output
Under Test
CL = 50 pF
(see Note A)
SCAS583I – NOVEMBER 1996 – REVISED MARCH 1999
PARAMETER MEASUREMENT INFORMATION
VCC × 2 V
500 Ω
500 Ω
S1
Open
GND
TEST S1
t
PLH/tPHL
t
PLZ/tPZL
t
PHZ/tPZH
SN74LVC161284
19-BIT BUS INTERFACE
Open
VCC × 2 V
GND
Input
(see Note B)
t
PLH
Output
B or Y Output
Under Test
LOAD CIRCUIT
1.4 V
50% V
CC
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES (B to A)
500 Ω
TP1
From
500 Ω
t
PHL
t
PLH
1.4 V
V
CC
Sink Load
Source Load
CL = 50 pF
(see Note A)
CL = 50 pF
(see Note A)
2.7 V
0 V
t
PHL
V
50% V
CC
V
B-TO-A LOAD (Totem Pole)
S1 at VCC × 2 V
OH
OL
(see Note D)
Output
Output
Control
Output
Waveform 1
(see Note C)
Output
Waveform 2
S1 at GND
(see Note C)
Input
t
PLH
1.4 V
t
PZL
1.4 V
t
PZH
1.4 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
t
w
1.4 V
VOL + 1.4 V
VOLTAGE WAVEFORMS MEASURED AT TP1
PROPAGATION DELAY TIMES (A to B)
1.4 V
1.4 V
t
PLZ
VOL + 0.3 V
t
PHZ
VOH – 0.3 V
t
PHL
VOH – 1.4 V
2.7 V
0 V
3 V
V
OL
V
OH
0 V
2.7 V
0 V
V
OH
V
OL
A-TO-B LOAD OR A-TO-Y LOAD (Totem Pole)
NOTES: A. CL includes probe and jig capacitance.
B. Input rise and fall times are 3 ns.
C. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
D. Input rise and fall times are 3 ns. Pulse duration is 150 ns < tw < 10 µs.
E. The outputs are measured one at a time with one transition per measurement.
Figure 2. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
7
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Copyright 1999, Texas Instruments Incorporated
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