MC54F245 Datasheet, PDF (1/2 Pages) Motorola, Inc – OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE INPUTS/OUTPUTS

3
OCTAL BIDIRECTIONAL
TRANSCEIVER WITH
3-STATE INPUTS/OUTPUTS
The MC54/74F245 contains eight noninverting bidirectional buffers with
3-state outputs and is intended for bus-oriented applications. Current sinking
capability is 24 mA at the A ports and 64 mA at the B ports. The Transmit/Re-
ceive (T/R) input determines the direction of data flow through the bidirectional
transceiver. Transmit (active HIGH) enables data from A ports to B ports; Re-
ceive (active LOW) enables data from B ports to A ports. The Output Enable
input, when HIGH, disables both A and B ports by placing them in a high-Z
condition.
• Noninverting Buffers
• Bidirectional Data Path
• B Outputs Sink 64 mA
• ESD ^> 4000 Volts
CONNECTION DIAGRAM (TOP VIEW)
VCC OE B0 B1 B2 B3 B4 B5 B6 B7
20 19 18 17 16 15 14 13 12 11
MC54/74F245
OCTAL BIDIRECTIONAL
TRANSCEIVER WITH 3-STATE
INPUTS/OUTPUTS
FAST™ SCHOTTKY TTL
20
1
20
1
J SUFFIX
CERAMIC
CASE 732-03
N SUFFIX
PLASTIC
CASE 738-03
1
2
T/R A0
3
4
A1 A2
5
6
7
8
A3 A4 A5 A6
FUNCTION TABLE
Inputs
OE T/R
Output
L L Bus B Data to Bus A
L H Bus A Data to Bus B
H X High-Z State
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
9 10
A7 GND
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
TA
Supply Voltage
Operating Ambient Temperature Range
IOH
Output Current — High
IOL
Output Current — Low
IOH
Output Current — High
IOL
Output Current — Low
An Outputs
An Outputs
Bn Outputs
Bn Outputs
54, 74
54
74
54, 74
74
54
54
74
54
74
20
1
DW SUFFIX
SOIC
CASE 751D-03
ORDERING INFORMATION
MC54FXXXJ Ceramic
MC74FXXXN Plastic
MC74FXXXDW SOIC
Min
Typ
Max
Unit
4.5
5.0
5.5
V
–55
25
125
°C
0
25
70
–3.0
mA
24
mA
20
mA
–12
mA
–15
48
mA
64
FAST AND LS TTL DATA
4-115