MC74AC643 Datasheet PDF - Motorola


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MC74AC643
Motorola

Part Number MC74AC643
Description OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE OUTPUTS
Page 6 Pages

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MC74AC643
MC74ACT643
Octal Bidirectional Transceiver
with 3ĆState Outputs
The MC74AC643/74ACT643 octal bus transceiver is designed for asynchronous
two-way communication between data buses. The device transmits data from bus A
to bus B when T/R = HIGH, or from bus B to bus A when T/R = LOW. The enable
input can be used to disable the device so the buses are effectively isolated.
Bidirectional Data Path
A and B Outputs Sink 24 mA/Source –24 mA
• ′ACT643 Has TTL Compatible Inputs
VCC OE B0 B1 B2 B3 B4 B5 B6 B7
20 19 18 17 16 15 14 13 12 11
OCTAL BIDIRECTIONAL
TRANSCEIVER WITH
3-STATE OUTPUTS
N SUFFIX
CASE 738-03
PLASTIC
1 2 3 4 5 6 7 8 9 10
T/R A0 A1 A2 A3 A4 A5 A6 A7 GND
PIN NAMES
A0–A7
OE
T/R
B0–B7
Side A Inputs or 3-State Outputs
Output Enable Input
Transmit/Receive Input
Side B Inputs or 3-State Outputs
TRUTH TABLE
OE T/R
HX
LH
LH
LL
LL
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Applied
Inputs
X
H
L
H
L
Valid
Direction
I/PO/P
X
A to B
A to B
B to A
B to A
Output
X
L
H
H
L
DW SUFFIX
CASE 751D-04
PLASTIC
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MC74AC643 MC74ACT643
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
VCC
Vin
Vout
Iin
Iout
ICC
Tstg
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC VCC or GND Current per Output Pin
Storage Temperature
–0.5 to +7.0
–0.5 to VCC +0.5
–0.5 to VCC +0.5
±20
±50
±50
–65 to +150
V
V
V
mA
mA
mA
°C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min Typ
VCC
Supply Voltage
AC
ACT
2.0 5.0
4.5 5.0
Vin, Vout
tr, tf
DC Input Voltage, Output Voltage (Ref. to GND)
Input Rise and Fall Time (Note 1)
AC Devices except Schmitt Inputs
VCC @ 3.0 V
VCC @ 4.5 V
VCC @ 5.5 V
0
150
40
25
Input Rise and Fall Time (Note 2)
tr, tf ACT Devices except Schmitt Inputs
TJ Junction Temperature (PDIP)
TA Operating Ambient Temperature Range
VCC @ 4.5 V
VCC @ 5.5 V
–40
10
8.0
25
IOH Output Current — High
IOL Output Current — Low
1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. Vin from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
Max
6.0
5.5
VCC
140
85
–24
24
Unit
V
V
ns/V
ns/V
°C
°C
mA
mA
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MC74AC643 MC74ACT643
DC CHARACTERISTICS
Symbol
Parameter
VIH
VIL
VOH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
VCC
(V)
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
74AC
74AC
TA = +25°C
TA =
–40°C to +85°C
Typ Guaranteed Limits
1.5 2.1
2.25 3.15
2.75 3.85
2.1
3.15
3.85
1.5 0.9
2.25 1.35
2.75 1.65
0.9
1.35
1.65
2.99 2.9
4.49 4.4
5.49 5.4
2.9
4.4
5.4
VOL
Maximum Low Level
Output Voltage
3.0 2.56
4.5 3.86
5.5 4.86
3.0 0.002 0.1
4.5 0.001 0.1
5.5 0.001 0.1
2.46
3.76
4.76
0.1
0.1
0.1
IIN Maximum Input
Leakage Current
3.0 0.36 0.44
4.5 0.36 0.44
5.5 0.36 0.44
5.5 ±0.1 ±1.0
IOZT
Maximum
3-State
Current
5.5 ±0.6 ±6.0
IOLD
IOHD
ICC
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5 75
5.5 –75
5.5 8.0 80
* All outputs loaded; thresholds on input associated with output under test.
† Maximum test duration 2.0 ms, one output loaded at a time.
Note: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC.
Unit
V
V
V
V
V
V
µA
µA
mA
mA
µA
Conditions
VOUT = 0.1 V
or VCC – 0.1 V
VOUT = 0.1 V
or VCC – 0.1 V
IOUT = –50 µA
*VIN = VIL or VIH
–12 mA
IOH –24 mA
–24 mA
IOUT = 50 µA
*VIN = VIL or VIH
12 mA
IOL 24 mA
24 mA
VI = VCC, GND
VI (OE) = VIL, VIH
VI = VCC, GND
VO = VCC, GND
VOLD = 1.65 V Max
VOHD = 3.85 V Min
VIN = VCC or GND
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MC74AC643 MC74ACT643
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
74AC
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
tPLH
tPHL
tPZH
Propagation Delay
An to Bn or Bn to An
Propagation Delay
An to Bn or Bn to An
Output Enable Time
tPZL
Output Enable Time
tPHZ
Output Disable Time
tPLZ
Output Disable Time
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
Min Typ Max
3.3 1.5
5.0 1.5
3.3 1.5
5.0 1.5
8.5
6.5
8.5
6.5
3.3 2.5
5.0 1.5
3.3 2.5
5.0 1.5
12.5
9.5
12.5
9.5
3.3 2.0
5.0 1.5
3.3 2.0
5.0 1.5
12.0
9.0
12.0
9.5
74AC
TA = –40°C
to +85°C
CL = 50 pF
Min Max
1.0 9.5
1.0 7.5
1.0 9.5
1.0 7.5
2.0 13.5
1.0 10.0
2.0 13.5
1.0 10.0
1.0 12.5
1.0 10.0
1.5 13.5
1.0 10.5
Unit
ns
ns
ns
ns
ns
ns
Fig.
No.
3-5
3-5
3-7
3-8
3-7
3-8
DC CHARACTERISTICS
74ACT
74ACT
Symbol
Parameter
VCC
(V)
TA = +25°C
TA =
–40°C to +85°C
Unit
Conditions
Typ Guaranteed Limits
VIH
VIL
VOH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
4.5 1.5 2.0
5.5 1.5 2.0
4.5 1.5 0.8
5.5 1.5 0.8
4.5 4.49 4.4
5.5 5.49 5.4
2.0
2.0
0.8
0.8
4.4
5.4
V VOUT = 0.1 V
or VCC – 0.1 V
V VOUT = 0.1 V
or VCC – 0.1 V
V IOUT = –50 µA
*VIN = VIL or VIH
4.5
3.86 3.76
V
–24 mA
5.5 4.86 4.76
IOH –24 mA
VOL
Maximum Low Level
Output Voltage
4.5 0.001 0.1
5.5 0.001 0.1
0.1
0.1
V IOUT = 50 µA
*VIN = VIL or VIH
4.5
0.36 0.44
V
24 mA
5.5 0.36 0.44
IOL 24 mA
IIN Maximum Input
Leakage Current
5.5
±0.1 ±1.0
µA VI = VCC, GND
ICCT
Additional Max. ICC/Input
5.5 0.6
1.5 mA VI = VCC – 2.1 V
IOZT
IOLD
IOHD
Maximum
3-State
Current
†Minimum Dynamic
Output Current
VI (OE) = VIL, VIH
5.5
±0.6 ±6.0
µA VI = VCC, GND
VO = VCC, GND
5.5 75 mA VOLD = 1.65 V Max
5.5 –75 mA VOHD = 3.85 V Min
ICC Maximum Quiescent
Supply Current
5.5
8.0 80
µA VIN = VCC or GND
* All outputs loaded; thresholds on input associated with output under test.
† Maximum test duration 2.0 ms, one output loaded at a time.
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