Page 1
74LVC1284
3.3V Parallel printer interface
transceiver/buffer
Product specification 1995 Nov 10
INTEGRATED CIRCUITS
IC24 Low Voltage Handbook
Page 2
Philips Semiconductors Product specification
74L VC12843.3V Parallel printer interface transceiver/buffer
2
1995 Nov 10 853-1819 16000
FEA TURES
•Asynchronous operation
•4-Bit transceivers
•3 additional buffer/driver lines
•TTL compatible inputs
•ESD protection exceeds 1000V per MIL STD 883 Method 3015
and 200V per Machine Model
•Input Hysteresis
•Low Noise Operation
•Center Pin V
CC
& GND
•IEEE 1284 Compliant Level 1 & 2
•Overvoltage Protection on B side
DESCRIPTION
The 74LVC1284 parallel interface chip is designed to provide an
asynchronous, 4-bit, bi-directional, parallel printer interface for
personal computers. Three additional lines are included to provide
handshaking signals between the host and the peripheral. The part
is designed to match IEEE 1284 standard.
The 4 transceiver pins (A/B 1-4) allow data transmission from the A
bus to the B bus, or from the B bus to the A bus, depending on the
state of the direction pin DIR.
The B bus and the Y5-Y7 lines have totem pole or open drain style
outputs depending on the state of the high drive enable pin HD.
The A bus only has totem pole style outputs. All inputs are TTL
compatible with at least 300mV of input hysteresis at V
CC
= 3.3V .
QUICK REFERENCE DA TA
SYMBOL PARAMETER
CONDITIONS
T
amb
= 25°C; GND = 0V
TYPICAL UNIT
R
D
B/Y Side output resistance VCC = 3.3V; VO = 1.65V 0.2V (See Figure 2) 45 Ω
SR B/Y Side slew rate RL = 62Ω; CL = 50pF (See Waveform 4) 0.2 V/ns
I
CC
Total static current VI = VCC/GND; IO = 0 5 µA
V
HYS
Input hysteresis VCC= 3.3V 0.4 V
t
PLH/tPHL
A –B/Y
Propagation delay
to the B/Y side outputs
VCC = 3.3V 12.6/12.4 ns
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE ORDER CODE DRAWING NUMBER
20-pin plastic SO 0°C to +70°C 7LVC1284 D SOT163-1
20-pin plastic SSOP Type II 0°C to +70°C 74LVC1284 DB SOT339-1
20-pin plastic TSSOP Type I 0°C to +70°C 74LVC1284 PW SOT360-1
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
A1
A2
A3
A4
GND
GND
A5
A6
A7
DIR
B1
B2
B3
B4
V
CC
V
CC
Y5
Y7
Y6
HD
SK00001
LOGIC SYMBOL
DIR HD
Y7A7
AY
Y6A6
AY
Y5A5
AY
B4A4
AB
AB
B2A2
AB
AB
B3A3
B1A1
SK00009
Page 3
Philips Semiconductors Product specification
74LVC12843.3V Parallel printer interface transceiver/buffer
1995 Nov 10
3
PIN DESCRIPTION
PIN NUMBER SYMBOL FUNCTION
1,2,3,4 A1 - A4 Data inputs/outputs
20,19,18,17 B1 - B4
IEEE 1284 Std.
outputs/inputs
7,8,9 A5 - A7 Data inputs
14,13,12 Y5 - Y7 IEEE 1284 Std. outputs
10 DIR Direction selection
11 HD
B/Y–side high drive
enable/disable
5,6 GND Ground (0V)
15,16 V
CC
Positive supply voltage
FUNCTION TABLE
INPUTS OUTPUTS INPUTS/OUTPUTS
DIR HD A5-7 Y5-7 A1-4 B1-4
L L L L A = B Inputs
L L H Z A = B Inputs
L H L L A = B Inputs
L H H H A = B Inputs
H L L L Inputs Low Outputs Low
H L H Z Inputs High Outputs Z
H H L L Inputs B = A
H H H H Inputs B = A
H = High Voltage
L = Low Voltage
Z = High Impedance, Off-State
ABSOLUTE MAXIMUM RATINGS
1, 2
SYMBOL
PARAMETER CONDITIONS RATING UNIT
ESD Immunity, per Mil Std 883C method 3015 2 kV
V
CC
DC supply voltage –0.5 to +4.6 V
I
IK
DC input diode current VI < 0 20 mA
I
OK
DC output diode current VO < 0 50 mA
V
IN
DC input voltage
3
–0.5 to +5.5 V
V
OUT
B/Y
DC
DC output voltage on B/Y side
3
–0.5 to +5.5 V
V
OUT
B/Y (tr) Transient output voltage on B/Y side
4
40ns transient –2 to +7 V
V
OUT
A side DC output voltage on A side –0.5 to V
CC
+0.5 V
I
O
DC output current Outputs in High or Low state 50 mA
T
stg
Storage temperature range –60 to +150 °C
ICC/I
GND
Continuous current through VCC or GND 200 mA
NOTES:
1. Stresses beyond those listed 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 .
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.
3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
4. V
OUT
B/Y (tr) guarantees only that this part will not be damaged by reflections in application so long as the voltage levels remain in the
specified range.
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
MIN MAX
UNIT
V
CC
DC supply voltage 3.0 3.6 V
V
I
Input voltage 0 V
CC
V
V
OUT
B/Y output voltage –0.5 5.5 V
V
OUT
A side output voltage 0 V
CC
V
I
OH
B/Y side output current High –14 mA
I
OL
B/Y side output current Low 14 mA
T
amb
Operating free-air temperature range 0 +70 °C
Page 4
Philips Semiconductors Product specification
74LVC12843.3V Parallel printer interface transceiver/buffer
1995 Nov 10
4
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL PARAMETER TEST CONDITIONS
T
amb
= 25°C T
amb
= 0°C to +70°C
UNIT
MIN TYP MAX MIN MAX
VCC = Min to Max; IOH = –50µA VCC–0.2 V
CC
VCC–0.2 V
V
OH
High-l
eve
l
p
An
VCC = 3.0V; IOH = –4mA 2.4 2.4 V
out ut voltage
Bn or Yn VCC = 3.0V; IOH = 14mA 2.2 2.4 2.1 V
-
An
VCC = Min to Max; IOL = 50µA;
V
I
= VIL or V
IH
0.2 0.2 V
V
OL
Low level
output voltage
VCC = 3.0V; IOL = 4mA; VI = VIL or V
IH
0.4 0.4 V
Bn or Yn VCC = 3.0V; IOL = –14mA; VI = VIL or V
IH
0.8 0.9 V
V
IH
High-level input voltage VCC = Min to Max 0.8 0.8
V
IL
Low-level input voltage VCC = Min to Max 2.0 2.0
V
HYS
Input Hysteresis VCC = 3.3V 0.4 0.3 V
R
D
B/Y side Output
Impedance
See Figure 2 38 45 53 35 55 Ω
I
I
Input leakage current
(A5-A7 DIR, HD)
VCC = 3.6V; VO = VCC or GND;
Not for I/O pins
±1.0 ±5.0 µA
I
IHZ/IILZ
Input current for common
I/O pins
VCC = 3.6V;VI = 5.5V or GND 0.1 15 µA
I
OFF
B/Y Side Power-off
leakage current
VCC = 0.0V; VO = 0 to 5.5V ±10 ±100 µA
I
OZH
3-State output High
current Yn
VCC = 3.6V; VO = VCC; VI = VIL or V
IH
5 20 µA
I
OZL
3-State output Low
current Yn
VCC = 3.6V; VO = GND; VI = VIL or V
IH
–5 –20 µA
IIH+I
OZH
current (A1 – A4, Bn) VCC = 3.6V; V
I/O
= V
CC
5 25 µA
IIL+I
OZL
current (A1 – A4, Bn) VCC = 3.6V; V
I/O
= GND –5 –25 µA
I
CC
Quiescent Supply
Current
VCC = 3.6V; IO = 0; VI = GND or V
CC
5 10 50 µA
AC CHARACTERISTICS
GND = 0V, tR = tF = 3.0ns, CL = 50pF, RL = 500Ω
LIMITS
SYMBOL PARAMETER WAVEFORM
T
amb
= 25°C
VCC = 3.3V
T
amb
= 0 to + 70°C
VCC = Min to Max
UNIT
MIN TYP MAX MIN MAX
SR B-Side Slew Rate 4 0.05 0.2 0.35 0.05 0.4 V/ns
t
PLH
t
PHL
Propagation delay
A toY or A to B
5
6.0
6.0
12.6
12.4
18.0
18.0
5.0
5.0
19.5
20.0
ns
t
PLH
t
PHL
Propagation delay
B to A
1
1.5
1.5
5.5
5.6
7.9
7.6
1.5
1.5
9.5
9.0
ns
t
PZH
t
PHZ
Output enable/disable time to/from High level
HD to Y or HD to B
2
4.0
2.0
12.0
6.5
16.0
9.1
4.0
2.0
20.0
11.0
ns
t
PZL
t
PLZ
Output enable/disable time to/from Low level
A to Y or A to B
2
5.0
1.5
12.7
5.0
16.3
7.1
5.0
1.5
20.0
9.0
ns
t
PZH
t
PZL
Output enable time
from DIR to B
2
8.0
8.0
12.3
12.7
18.0
18.0
4.0
4.0
20.0
20.0
ns
t
PHZ
t
PLZ
Output disable time
from DIR to B
2
5.0
6.0
8.9
9.1
12.5
12.0
2.0
2.0
14.5
14.0
ns
t
PZH
t
PZL
Output enable time
from DIR to A
2
3.5
4.0
6.9
8.6
13.0
14.0
3.0
3.0
14.5
16.0
ns
t
PHZ
t
PLZ
Output disable
from DIR to A
2
2.5
2.5
3.7
3.7
5.5
5.0
2.0
2.0
6.0
5.5
ns
Page 5
Philips Semiconductors Product specification
74LVC12843.3V Parallel printer interface transceiver/buffer
1995 Nov 10
5
AC WAVEFORMS
VM = 1.5V
V
X
= VOL "0.3V
V
Y
= VOH –0.3V
V
OL
and VOH are the typical output voltage drops that occur with the
output load. (V
CC
never goes below 3.0V).
V
M
t
PLH
t
PHL
V
OH
V
OL
SY00001
V
M
INPUTS
GND
OUTPUTS
V = 2.7V
Waveform 1. Input Bn to output An propagation delays
V
CC
OUTPUT
LOW-to-OFF
OFF-to-LOW
V
OL
V
OH
OUTPUT
HIGH-to-OFF
OFF-to-HIGH
GND
t
PZH
V
M
V
M
V
M
V
M
V
M
t
PZL
t
PHZ
t
PLZ
outputs
enabled
outputs
disabled
outputs
enabled
DIR
to A
DIR
to B
HD
to B
V
X
V
Y
SY00002
Waveform 2. 3-State enable and disable times
t
PLH
t
PHL
SY00008
INPUT
OUTPUT
2.4V
1.4V
0.4V
V
OUT
V
OUT
–1.4V1.4V
1.4V
Waveform 3. Voltage Waveforms Propagation Delay Times
(A To B) Measured at Output Pin
0.4V
2.4V
0.9V
0.4V
t1 t2 t1 t2
2.4V
1.9V
INPUT
OUTPUT
SY00007
Waveform 4. Slew Rate Waveforms Voltage Waveforms
(Input pulse rise and fall time are 3ns, 150ns t pulse width t10 µs,
for both a Low to High and a High to Low transition.)
Slew Rate measured between 0.4V and 0.9V - rising.
Slew Rate measured between 2.4V and 1.9V - falling.
Slew Rate measured at TP1.
Page 6
Philips Semiconductors Product specification
74LVC12843.3V Parallel printer interface transceiver/buffer
1995 Nov 10
6
PULSE
GENERATOR
R
T
V
IN
D.U.T.
V
OUT
50pF
V
CC
Test Circuit for Bn or Yn Outputs
GND
V
CC
RL = 500Ω t
PLH/PHL
= 62
Ω
for SR test
PULSE
GENERATOR
R
T
V
IN
D.U.T
V
OUT
R
L
V
CC
Test Circuit for An Outputs
V
M
NEGATIVE
PULSE
90%
t
W
POSITIVE
PULSE
10%
VM = 1.5V
Input Pulse Definition
74LVC
SY00004
S
1
C
L
t
W
10%
t
THL
(tf)
t
TLH
(tr)
90%
V
M
10%
V
M
90%
t
THL
(tf)
t
TLH
(tr)
AMP (V)
0V
AMP (V)
0V
V
M
10%
90%
SWITCH POSITION
Bn or Yn Outputs
TEST SWITCH
t
PLH
GND
t
PHL
V
CC
DEFINITIONS
RL = Load resistor; see AC CHARACTERISTICS for value.
C
L
= Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
R
T
= Termination resistance should be equal to Z
OUT
of
pulse generators.
INPUT PULSE REQUIREMENTS
FAMILY
Amplitude Rep. Rate t
W
t
r
t
f
3.0V 1MHz 500ns 3ns 3ns
Waveform 5.
PULSE
GENERATOR
V
I
R
T
D.U.T.
V
O
C
L
50pF
S
1
2 x V
CC
Open
GND
500Ω
500Ω
V
CC
V
I
t 2.7V V
CC
2.7V – 3.6V 2.7V
Test S
1
GND
t
PLZ/tPZL
2 x V
CC
t
PHZ/tPZH
t
PLH/tPHL
Open
SY00003
V
CC
Figure 1. Load Circuitry for Bn to An Switching Times
TEST CIRCUIT
D.U.T.
V
CC
I
O
VCC/2
I
O
is measured by forcing VCC/2 on the output. RD can then
be calculated using the equation RD = VCC/2 ť IO ť.
SY00005
Figure 2. Output Impedance RD
Page 7
Philips Semiconductors Product specification
74LVC12843.3V Parallel printer interface transceiver/buffer
1995 Nov 10
7
SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1
Page 8
Philips Semiconductors Product specification
74LVC12843.3V Parallel printer interface transceiver/buffer
1995 Nov 10
8
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm SOT339-1
Page 9
Philips Semiconductors Product specification
74LVC12843.3V Parallel printer interface transceiver/buffer
1995 Nov 10
9
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm SOT360-1
Page 10
Philips Semiconductors Product specification
74LVC12843.3V Parallel printer interface transceiver/buffer
yyyy mmm dd
10
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury . Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
print code Date of release: 05-96
Document order number: 9397-750-04523
Data sheet
status
Objective
specification
Preliminary
specification
Product
specification
Product
status
Development
Qualification
Production
Definition
[1]
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
Data sheet status
[1] Please consult the most recently issued datasheet before initiating or completing a design.
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