•Combines74F245 and 74F373 type functions in one chip
•8-bit octal transceiver with D-type latch
•74F543 Non-inverting
74F544 Inverting
•Back-to-back registers for storage
•Separate controls for data flow in each direction
•A outputs sink 20mA and source 3mA
•B outputs sink 64mA and source 15mA
•3-State outputs for bus-oriented applications
•74F543 available in SSOP Type II package
DESCRIPTION
The 74F543 and 74F544 Octal Registered Transceivers contain two
sets of D-type latches for temporary storage of data flowing in either
direction. Separate Latch Enable (LEAB
, OEBA) inputs are provided for each register to permit
(OEAB
independent control of inputting and outputting in either direction of
data flow. While the 74F543 has non-inverting data path, the 74F544
inverts data in both directions. The A outputs are guaranteed to sink
24mA, while the B outputs are rated for 64mA.
ORDERING INFORMATION
DESCRIPTION
24-pin plastic skinny DIP (300mil)
24-pin plastic SOL
24-pin plastic SSOP Type II74F543DBSOT340-1
, LEBA) and Output Enable
COMMERCIAL RANGE
V
T
A
CC
= 0°C to +70°C
N74F543N,
N74F544N
N74F543D,
N74F544D
FUNCTIONAL DESCRIPTION
The 74F543 and 74F544 contain two sets of eight D-type latches,
with separate input and controls for each set. For data flow from A to
B, for example, the A-to-B Enable (EAB
to enter data from A0 - A7 or take data from B0 - B7, as indicated in
the Function Table. With EAB
Enable (LEAB
subsequent Low-to-High transition for the LEAB
A latches in the storage mode and their outputs no longer change
with the A inputs. With EAB
B output buffers are active and display the data present at the
outputs of the A latches. Control of data flow from B to A is similar,
but using the EBA
H = High voltage level
L = Low voltage level
h = High state must be present one setup time before the
Low-to-High transition of LEXX
or EXX (XX=AB or BA)
l= Low state must be present one setup time before the
Low-to-High transition of LEXX
↑ = Low-to-High transition of LEXX
or EXX (XX=AB or BA)
or EXX XX = AB or BA
X = Don’t care
NC = No change
Z = High impedance “off” state
Disable +
Latch
Latch +
Display
p
1994 Dec 5
4
Page 5
Philips Semiconductors Product specification
74F543, 74F544Octal registered transceivers
LOGIC DIAGRAM FOR 74F543
OEBA
EBA
VCC = Pin 24
GND = Pin 12
LEBA
LOGIC DIAGRAM FOR 74F544
QD
LE
3
A0
4
A1
5
A2
6
A3
7
A4
8
A5
9
A6
10
A7
2
23
1
DETAIL A X 7
DETAIL A
QD
LE
22
B0
21
B1
20
B2
19
B3
18
B4
17
B5
16
B6
15
B7
13
OEAB
11
EAB
14
LEAB
SF00243
VCC = Pin 24
GND = Pin 12
OEBA
EBA
LEBA
QD
LE
3
0
A
4
A
1
5
A
2
6
A
3
7
4
A
8
A
5
9
6
A
10
A
7
2
23
1
DETAIL A X 7
DETAIL A
QD
LE
22
B0
21
B
20
B
19
B
18
B
17
B
16
B
15
B
13
OEAB
11
EAB
14
LEAB
SF00244
1
2
3
4
5
6
7
1994 Dec 5
5
Page 6
Philips Semiconductors Product specification
I
Current applied to output in Low output state
SYMBOL
PARAMETER
UNIT
IOHHigh-level output current
IOLLow-level output current
74F543, 74F544Octal registered transceivers
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the
operating free-air temperature range.)
SYMBOLPARAMETERRATINGUNIT
V
CC
V
IN
I
IN
V
OUT
OUT
T
amb
T
STG
RECOMMENDED OPERATING CONDITIONS
V
CC
V
IH
V
IL
I
IK
T
amb
Supply voltage-0.5 to +7.0V
Input voltage-0.5 to +7.0V
Input current-30 to +5mA
Voltage applied to output in High output state-0.5 to +5.5V
pp
p
p
Operating free-air temperature range0 to +70
Storage temperature-65 to +150
(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
MINTYP2MAX
A0 - A7,
A0 - A7
p
B0 - B7,
B0 - B7
A0 - A7,
A0 - A7
p
B0 - B7,
B0 - B7
V
Input clamp voltageVCC = MIN, II = I
IK
Input current at maximum
I
input voltage
I
High-level input currentVCC = MAX, VI = 2.7V20µA
IH
OEAB, OEBA, EABVCC = MAX, VI = 7.0 V100µA
OthersVCC = 5.5, VI = 5.5V1mA
V
V
CC
=
= MIN
CC
=
= MIN
=
=
OH
OH
OL
OL
= -
= -
=
=
IK
10%V
5%V
10%V
5%V
10%V
5%V
10%V
5%V
2.4
CC
2.73.4V
CC
2.0V
CC
2.0V
CC
CC
CC
CC
CC
0.350.50V
0.350.50V
0.420.55V
–0.73–1.2V
0.55V
Others–0.6mA
I
Low-level input current
IL
EAB,
VCC = MAX, VI = 0.5V
–1.2mA
EBA
I
+ IIHOff-state output current, high-level voltage appliedVCC= MAX, VO = 2.7V70µA
OZH
I
+ IILOff-state output current, Low-level voltage appliedVCC= MAX, VO = 0. 5V–600µA
OZH
A0 - A7,
p
A0 - A7
B0 - B7,
CC
=
–60–150mA
–100–225mA
B0 - B7
pp
74F543
74F544
I
CCH
I
CCL
I
CCZ
I
CCH
I
CCL
I
CCZ
VCC = MAX
VCC = MAX
70105mA
95135mA
95135mA
80110mA
105140mA
100135mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under the recommended operating conditions for the applicable
type.
2. All typical values are at V
3. Not more than one output should be shorted at a time. For testing I
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
= 5V, T
CC
amb
= 25°C.
, the use of high-speed test apparatus and/or sample-and-hold
OS
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I
SO24: plastic small outline package; 24 leads; body width 7.5 mmSOT137-1
1994 Dec 05
13
Page 14
Philips SemiconductorsProduct specification
74F543, 74F544Bus transceivers
SSOP24: plastic shrink small outline package; 24 leads; body width 5.3 mmSOT340-1
1994 Dec 05
14
Page 15
Philips SemiconductorsProduct specification
74F543, 74F544Bus transceivers
NOTES
1994 Dec 05
15
Page 16
Philips Semiconductors Product specification
74F543, 74F544Octal registered transceivers
DEFINITIONS
Data Sheet IdentificationProduct StatusDefinition
Objective Specification
Preliminary Specification
Product Specification
Formative or in Design
Preproduction Product
Full Production
Philips Semiconductors and Philips Electronics North America Corporation reserve 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. Applications that are described herein for any of these products are for illustrative purposes
only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.
LIFE SUPPORT APPLICA TIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
This data sheet contains the design target or goal specifications for product development. Specifications
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.
Philips Semiconductors and Philips Electronics North America Corporation
register eligible circuits under the Semiconductor Chip Protection Act.
Copyright Philips Electronics North America Corporation 1994
All rights reserved. Printed in U.S.A.
(print code)Date of release: July 1994
Document order number:9397-750-05135
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