3-STATE Outputs. 74ACT16543 Datasheet

74ACT16543 Outputs. Datasheet pdf. Equivalent

74ACT16543 Datasheet
Recommendation 74ACT16543 Datasheet
Part 74ACT16543
Description 16-Bit Registered Transceiver with 3-STATE Outputs
Feature 74ACT16543; 74ACT16543 16-Bit Registered Transceiver with 3-STATE Outputs August 1999 Revised October 1999 74A.
Manufacture Fairchild Semiconductor
Datasheet
Download 74ACT16543 Datasheet




Fairchild Semiconductor 74ACT16543
August 1999
Revised October 1999
74ACT16543
16-Bit Registered Transceiver with 3-STATE Outputs
General Description
The ACT16543 contains sixteen non-inverting transceivers
containing two sets of D-type registers for temporary stor-
age of data flowing in either direction. Each byte has sepa-
rate control inputs which can be shorted together for full
16-bit operation. Separate Latch Enable and Output
Enable inputs are provided for each register to permit inde-
pendent input and output control in either direction of data
flow.
Features
s Independent registers for A and B buses
s Separate controls for data flow in each direction
s Back-to-back registers for storage
Multiplexed real-time and stored data transfers
s Separate control logic for each byte
s Outputs source/sink 24 mA
s TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74ACT16543SSC
MS56A
56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300” Wide
74ACT16543MTD
MTD56
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
Pin Descriptions
Pin Names
OEABn
OEBAn
CEABn
CEBAn
LEABn
LEBAn
A0–A15
B0–B15
Descriptions
A-to-B Output Enable Input (Active LOW)
B-to-A Output Enable Input (Active LOW)
A-to-B Enable Input (Active LOW)
B-to-A Enable Input (Active LOW)
A-to-B Latch Enable Input (Active LOW)
B-to-A Latch Enable Input (Active LOW)
A-to-B Data Inputs or
B-to-A 3-STATE Outputs
B-to-A Data Inputs or
A-to-B 3-STATE Outputs
FACTis a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation DS500301
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Fairchild Semiconductor 74ACT16543
Functional Description
The ACT16543 contains sixteen non-inverting transceivers
with 3-STATE outputs. The device is byte controlled with
each byte functioning identically, but independent of the
other. The control pins may be shorted together to obtain
full 16-bit operation. The following description applies to
each byte. For data flow from A to B, for example, the A-to-
B Enable (CEABn) input must be LOW in order to enter
data from A0–A15 or take data from B0–B15, as indicated in
the Data I/O Control Table. With CEABn LOW, a LOW sig-
nal on the A-to-B Latch Enable (LEABn) input makes the A-
to-B latches transparent; a subsequent LOW-to-HIGH tran-
sition of the LEABn signal puts the A latches in the storage
mode and their outputs no longer change with the A inputs.
With CEABn and OEABn both LOW, the 3-STATE B output
buffers are active and reflect the data present at the output
of the A latches. Control of data flow from B to A is similar,
but using the CEBAn, LEBAn and OEBAn inputs.
Logic Diagrams
Data I/O Control Table
CEABn
H
X
L
X
L
Inputs
LEABn
X
H
L
X
X
OEABn
X
X
X
H
L
Latch Status
(Byte n)
Latched
Latched
Transparent
Output
Buffers
(Byte n)
High Z
High Z
Driving
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
A-to-B data flow shown; B-to-A flow control
is the same, except using CEBAn, LEBAn and OEBAn
Byte 1
(0:7)
Byte 2
(8:15)
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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Fairchild Semiconductor 74ACT16543
Absolute Maximum Ratings(Note 1)
Supply Voltage (VCC)
DC Input Diode Current (IIK)
VI = −0.5V
VI = VCC + 0.5V
DC Output Diode Current (IOK)
VO = −0.5V
VO = VCC + 0.5V
DC Output Voltage (VO)
DC Output Source/Sink Current (IO)
DC VCC or Ground Current
per Output Pin
Storage Temperature
0.5V to +7.0V
20 mA
+20 mA
20 mA
+20 mA
0.5V to VCC + 0.5V
±50 mA
±50 mA
65°C to +150°C
Recommended Operating
Conditions
Supply Voltage (VCC)
Input Voltage (VI)
Output Voltage (VO)
Operating Temperature (TA)
Minimum Input Edge Rate (V/t)
4.5V to 5.5V
0V to VCC
0V to VCC
40°C to +85°C
125 mV/ns
VIN from 0.8V to 2.0V
VCC @ 4.5V, 5.5V
Note 1: Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, with-
out exception, to ensure that the system design is reliable over its power
supply, temperature, and output/input loading variables. Fairchild does not
recommend operation of FACTcircuits outside databook specifications.
DC Electrical Characteristics
Symbol
Parameter
VIH Minimum HIGH
Input Voltage
VIL Maximum LOW
Input Voltage
VOH Minimum HIGH
Output Voltage
VCC
(V)
4.5
5.5
4.5
5.5
4.5
5.5
TA = +25°C
TA = −40°C to+85°C
Typ Guaranteed Limits
1.5 2.0
2.0
1.5 2.0
2.0
1.5 0.8
0.8
1.5 0.8
0.8
4.49
4.4
4.4
5.49
5.4
5.4
VOL Maximum LOW
Output Voltage
4.5 3.86
5.5 4.86
4.5 0.001
0.1
5.5 0.001
0.1
3.76
4.76
0.1
0.1
4.5
5.5
IOZT
Maximum I/O
Leakage Current
5.5
IIN Maximum Input
Leakage Current
5.5
ICCT
ICC
Maximum ICC/Input
Max Quiescent
Supply Current
5.5 0.6
5.5
IOLD
IOHD
Minimum Dynamic
Output Current (Note 3)
5.5
Note 2: All outputs loaded; thresholds associated with output under test.
Note 3: Maximum test duration 2.0 ms; one output loaded at a time.
0.36
0.36
±0.5
±0.1
8.0
0.44
0.44
±5.0
±1.0
1.5
80.0
75
75
Units
Conditions
V VOUT = 0.1V
or VCC 0.1V
V VOUT = 0.1V
or VCC 0.1V
V IOUT = −50 µA
VIN = VILor VIH
V IOH = 24 mA
IOH = 24 mA (Note 2)
V
IOUT = 50 µA
VIN = VILor VIH
V IOL = 24 mA
IOL = 24 mA (Note 2)
µA VI = VIL, VIH
VO = VCC, GND
µA VI = VCC,
GND
mA VI = VCC 2.1V
µA VIN = VCC
or GND
mA VOLD = 1.65V Max
mA VOHD = 3.85V Min
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