Page 1
INTEGRATED CIRCUITS
74HCT1284
Parallel printer interface transceiver/buffer
Product specification
Supersedes data of 1995 Jun 27
IC06 Data Handbook
1998 Jul 10
Page 2
Philips Semiconductors Product specification
74HCT1284Parallel printer interface transceiver/buffer
FEA TURES
•Asynchronous operation
•4-Bit transceivers
•3 additional buffer/driver lines
•TTL compatible inputs
•ESD protection exceeds 2000V per MIL STD 883 Method 3015
and 200V per Machine Model
•Input Hysteresis
•Low Noise Operation
•Center Pin V
& GND
CC
•IEEE 1284 Compliant Level 1 & 2
•Overvoltage Protection on B side
QUICK REFERENCE DATA
SYMBOL PARAMETER
C
t
PLH
t
PHL
C
I
IN
OUT
CC
Propagation delay
Bn to An
Input capacitance An, DIR, HD VI = 0V or V
Output capacitance Bn, Y
n
Total supply current VCC = 5.5V 500 nA
DESCRIPTION
The 74HCT1284 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 400mV of input hysteresis at V
CONDITIONS
T
= 25°C; GND = 0V
amb
CL = 50pF; VCC = 5V
CC
TYPICAL UNIT
5.3
5.6
5 pF
VO = 0V or VCC; 3-State 14 pF
= 5.0V.
CC
ns
ns
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE ORDER CODE DRAWING NUMBER
20-pin plastic DIP 0°C to +70°C 74HCT1284N SOT146-1
20-pin plastic SOL 0°C to +70°C 7HCT1284D SOT163-1
20-pin plastic SSOP Type II 0°C to +70°C 74HCT1284DB SOT339-1
20-pin plastic TSSOP Type I 0°C to +70°C 74HCT1284PW SOT360-1
PIN CONFIGURATION
1
A1
2
A2
3
A3
4
A4
5
GND
6
GND
7
A5
8
A6
9
A7
10 11
DIR
SK00001
B1
20
19
B2
18
B3
17
B4
16
V
CC
15
V
CC
14
Y5
13
Y6
12
Y7
HD
PIN DESCRIPTION
PIN NUMBER SYMBOL FUNCTION
1,2,3,4
20,19,18,17
7,8,9
14,13,12
10,11
5,6 GND Ground (0V)
15,16 V
A1 - A4
B1 - B4
A5 - A7
Y5 - Y7
DIR,HIGH
DRIVE
CC
Data inputs/outputs
Buffer/Driver lines
Direction, Drive
Positive supply voltage
1998 Jul 10 853–1768 19693
2
Page 3
Philips Semiconductors Product specification
SYMBOL
PARAMETER
UNIT
74HCT1284Parallel printer interface transceiver/buffer
LOGIC SYMBOL
AB
AB
B1A1
B2A2
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
AB
B3A3
L H L L A = B Inputs
L H H H A = B Inputs
AB
AY
AY
AY
DIR HD
ABSOLUTE MAXIMUM RATINGS
1, 2
SK00009
B4A4
H L L L Inputs Low Outputs Low
H L H Z Inputs High Outputs Z
Y5A5
Y6A6
Y7A7
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
SYMBOL PARAMETER CONDITIONS RATING UNIT
V
ICC/I
V
I
V
I
OK
OUT
I
OUT
T
CC
IK
stg
DC supply voltage –0.5 to +6.5 V
DC input diode current VI < 0 ±20 mA
I
DC input voltage
3
–2 to +7.0 V
DC output diode current VO < 0 ±50 mA
DC output voltage
3
Output in Off or High state –0.5 to +5.5 V
DC output current Output in Low state ±50 mA
Storage temperature range –65 to 150 °C
Continuous current through VCC or GND ±200 mA
GND
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.
RECOMMENDED OPERATING CONDITIONS
V
CC
V
V
V
I
OH
I
OL
T
amb
1998 Jul 10
DC supply voltage 4.7 5.5 V
Input voltage 0 V
I
High-level input voltage 2.0 V
IH
Low-level Input voltage 0.8 V
IL
High-level output current –14 mA
Low-level output current 14 mA
Operating free-air temperature range 0 +70 °C
LIMITS
MIN MAX
CC
V
3
Page 4
Philips Semiconductors Product specification
A
out ut voltage
Low-level
n
74HCT1284Parallel printer interface transceiver/buffer
DC ELECTRICAL CHARACTERISTICS
LIMITS
T
SYMBOL PARAMETER TEST CONDITIONS
VCC = Min to Max; IOH = –50µA VCC–0.2 V
OH
High-level
output voltage
V
n
VCC = 4.7V; IOH = –4mA 4.3 4.6 3.7 V
Bn or YnVCC = 4.7V; IOH = –14mA 2.6 2.9 2.4 V
VCC = Min to Max; IOL = 50µA;
VI = VIL or V
A
V
OL
output voltage
n
VCC = 4.7V; IOL = 4mA; VI = VIL or V
IH
Bn or YnVCC = 4.7V; IOL = 14mA; VI = VIL or V
V
I
I
I
IIH+I
IIL+I
R
OFF
OZH
OZL
I
Input Hysteresis VCC = 5.0V 0.4 0.50 0.4 V
HYS
B/Y side Output
D
Impedance
Input leakage current
I
I
(A5–A7)
B/Y Side Power-off
leakage current
3-State output High
current Y
n
3-State output Low
current Y
current (A1 – A4, Bn) VCC = 5.5V; V
OZH
current (A1 – A4, Bn) VCC = 5.5V; V
OZL
Quiescent Supply
CC
Current
n
See Figure 1 8 15 22 8 22 Ω
VCC = 5.5V; VO = VCC or GND ±0.5 ±1.0 ±5.0 µA
VCC = 0.0V; VO = 0 to 7V ±1 ±10 ±100 µA
VCC = 5.5V; VO = VCC; VI = VIL or V
VCC = 5.5V; VO = GND; VI = VIL or V
= V
I/O
CC
= GND –1 –5 –25 µA
I/O
VCC = 5.5V; IO = 0; VI = GND or V
CC
= 25°C T
amb
MIN TYP MAX MIN MAX
CC
0 0.2 0.2 V
IH
IH
IH
IH
0.1 0.25 0.4 V
0.15 0.3 0.4 V
1 5 20 µA
–1 –5 –20 µA
1 5 25 µA
0.5 250 400 µA
= 0°C to +70°C
amb
UNIT
VCC–0.2 V
1998 Jul 10
4
Page 5
Philips Semiconductors Product specification
74HCT1284Parallel printer interface transceiver/buffer
AC CHARACTERISTICS
GND = 0V, tR = tF = 3.0ns, CL = 50pF, RL = 500Ω
LIMITS
T
= 25°C
SYMBOL PARAMETER WAVEFORM
amb
VCC = 5.0V
MIN TYP MAX MIN MAX
SR B-Side Slew Rate 0.05 0.11 0.4 0.05 0.4 V/ns
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PHZ
t
PZL
t
PLZ
Propagation delay
A toY or A to B
Propagation delay
B to A
Output enable/disable time to/from High level
HD to Y or HD to B
Output enable/disable time to/from Low level
A to Y or A to B
2
1
3
4
5.0
5.0
1.5
1.5
4.0
2.0
5.0
1.5
13.9
21.0
5.3
5.6
12.0
6.5
12.7
5.0
17.1
25.7
7.5
7.9
16.0
9.1
16.3
7.1
T
= 0 to + 70°C
amb
VCC = Min to Max
5.0
5.0
1.5
1.5
4.0
2.0
5.0
1.5
22
31
9.0
10.0
20.0
11.0
20.0
9.0
UNIT
ns
ns
ns
ns
AC WAVEFORMS
For all waveforms, VM = 1.5V.
V
B
n
A1 – A
Output
Input
4
M
t
PLH
Waveform 1. Propagation Delay for Bn to A1–A4
HD Inputs
B
n
or Y
Output
n
V
M
t
PZH
Waveform 3. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
V
50% V
V
V
M
M
t
PHL
V
OH
t
PHZ
50% V
CC
V
OH
V
–0.3V
OH
0V
SK00005
SK00003
CC
M
V
A
Input
n
Bn or Y
n
Output
V
OL
M
t
PLH
V
M
VOH–1.4V
t
PHL
V
VOH–1.4V
OH
V
SK00004
OL
Waveform 2. Propagation Delay for An to Bn or Yn Outputs
A
Input
n
B
or Y
n
Output
V
M
t
PZL
n
V
M
t
PLZ
V
M
VOL +0.3V
V
OL
SK00006
Waveform 4. 3-State Output enable Time to Low Level and
Output disable Time from Low Level
1998 Jul 10
5
Page 6
Philips Semiconductors Product specification
74HCT1284Parallel printer interface transceiver/buffer
TEST CIRCUITS AND WAVEFORM
V
CC
I
O
D.U.T
is the voltage when 10µA is drawn from the high output.
V
OH
IO is measured by forcing VOH/2 on the output. RD can then
be calculated using the equation RD = |VOH/2IO| .
Figure 1. Output Impedance RD
VOH/2
SK00007
PULSE
GENERATOR
PULSE
GENERATOR
V
CC
35W
V
OUT
V
IN
D.U.T
R
T
Test Circuit for Bn or Yn Outputs
V
CC
V
IN
R
D.U.T
T
V
OUT
C
L
Test Circuit for An Outputs
SWITCH POSITION
B
or Yn Outputs
n
TEST SWITCH
V
50pF
S1
62W
R
L
CC
GND
90%
NEGATIVE
PULSE
POSITIVE
PULSE
10%
t
PLH
t
PHL
t
PZH
t
PHZ
t
PZL
t
PLZ
V
M
10% 10%
t
(tf)
THL
t
(tr)t
TLH
90% 90%
V
M
GND
V
CC
GND
GND
V
CC
V
CC
t
W
V
M
V
M
t
W
90%
10%
t
TLH
THL
AMP (V)
0V
(tr)
(tf)
AMP (V)
0V
VM = 1.5V
Input Pulse Definition
DEFINITIONS
RL = Load resistor; see AC CHARACTERISTICS for value.
C
= Load capacitance includes jig and probe capacitance;
L
see AC CHARACTERISTICS for value.
R
= Termination resistance should be equal to Z
T
pulse generators.
1998 Jul 10
OUT
of
FAMILY
INPUT PULSE REQUIREMENTS
Amplitude Rep. Rate t
t
W
r
74HCT 3.0V 1MHz 500ns 3ns 3ns
6
t
f
SK00008
Page 7
Philips Semiconductors Product specification
Parallel printer interface transceiver/buffer
DIP20: plastic dual in-line package; 20 leads (300 mil) SOT146-1
74HCT1284
1998 Jul 10
7
Page 8
Philips Semiconductors Product specification
Parallel printer interface transceiver/buffer
SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1
74HCT1284
1998 Jul 10
8
Page 9
Philips Semiconductors Product specification
Parallel printer interface transceiver/buffer
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm SOT339-1
74HCT1284
1998 Jul 10
9
Page 10
Philips Semiconductors Product specification
Parallel printer interface transceiver/buffer
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm SOT360-1
74HCT1284
1998 Jul 10
10
Page 11
Philips Semiconductors Product specification
Parallel printer interface transceiver/buffer
NOTES
74HCT1284
1998 Jul 10
11
Page 12
Philips Semiconductors Product specification
Parallel printer interface transceiver/buffer
Data sheet status
Data sheet
status
Objective
specification
Preliminary
specification
Product
specification
Product
status
Development
Qualification
Production
Definition
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 changes 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.
[1]
74HCT1284
[1] Please consult the most recently issued datasheet before initiating or completing a design.
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.
Date of release: 07-99
Document order number: 9397 750 06245
1998 Jul 10
12
Loading...