OCTAL BUS TRANSCEIVER,
INVERTING WITH 3-STATE OUTPUTS
The MC74F640 is an octal transceiver featuring inverting 3-state bus com-
patible outputs in both transmit and receive directions. The B port outputs are
capable of sinking 64 mA and sourcing 15 mA, providing very good capacitive
drive characteristics. The device features an Output Enable (OE) input for
easy cascading and Transmit/Receive (T/R) input for direction control. The
3-state outputs, B0–B7, have been designed to prevent output bus loading if
the power is removed from the device.
OCTAL BUS TRANSCEIVER,
INVERTING WITH
3-STATE OUTPUTS
FAST™ SCHOTTKY TTL
•
High-Impedance NPN Base Inputs for Reduced Loading
LIFETIME BUY
•
•
•
•
•
(70
µA
in High and Low States)
Ideal for Applications which Require High-Output Drive and Minimal
Bus Loading
Inverting Version of F245
Octal Bidirectional Bus Interface
3-State Buffer Outputs Sink 64 mA and Source 15 mA
ESD Sensitive — 4000 V HBM
20
1
J SUFFIX
CERAMIC
CASE 732-03
PIN ASSIGNMENT
VCC OE
20 19
B0
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
20
1
N SUFFIX
PLASTIC
CASE 738-03
20
1
DW SUFFIX
SOIC
CASE 751D-03
1
T/R
2
A0
3
A1
4
A2
5
A3
6
A4
7
A5
8
A6
9
A7
10
GND
ORDERING INFORMATION
MC74FXXXJ
Ceramic
MC74FXXXN Plastic
MC74FXXXDW SOIC
FUNCTION TABLE
Inputs
OE
L
L
H
T/R
L
H
X
O
Outputs
Bus B data to Bus A
Bus A data to Bus B
Z
H = High Voltage Level
L = Low Voltage Level
X = Don’t Care
Z = High Impedance “Off” State
LOGIC SYMBOL
2
3
4
5
6
7
A5
8
9
A0 A1
1
19
T/R
OE
B0 B1
18
17
A2 A3 A4
A6 A7
B2 B3 B4
16
15
14
B5
13
B6 B7
12
11
LAST ORDER 31/03/99
LAST SHIP 30/09/99
MC74F640
MC74F640
Symbol
VCC
TA
IOH
IOH
IOL
IOL
DC Supply Voltage
Parameter
74
74
An Outputs
Bn Outputs
An Outputs
Bn Outputs
74
74
74
74
Min
4.5
0
Typ
5.0
25
Max
5.5
70
–3.0
–15
24
64
Unit
V
°C
mA
mA
mA
mA
Operating Ambient Temperature Range
Output Current — High
Output Current — High
Output Current — Low
Output Current — Low
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Limits
LIFETIME BUY
Symbol
S b l
VIH
VIL
VIK
Parameter
P
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
74
An
74
74
Bn
74
74
Min
2.0
Typ
Max
Unit
U i
V
Test C di i
T
Conditions1
Guaranteed as a HIGH Signal
Guaranteed as a LOW Signal
VCC = MIN, IIN = –18 mA
IOH = –3.0 mA
IOH = –3.0 mA
IOH = –3.0 mA
IOH = –3.0 mA
IOH = –15 mA
IOL = 24 mA
IOL = 64 mA
VCC = MAX
VCC = MAX
VCC = 4.5 V
VCC = 4.75 V
VCC = 4.5 V
VCC = 4.75 V
VCC = 4.5 V
0.8
–1.2
2.4
2.7
2.4
2.7
2.0
0.35
0.5
0.55
70
– 70
OE, T/R
40
100
1.0
– 40
– 60
–100
–150
3.3
3.3
3.4
3.4
V
V
V
V
V
V
V
V
V
µA
µA
µA
µA
mA
µA
mA
VOH
Output HIGH V l
O
Voltage
VOL
IOZH + IIH
IOZL + IIL
Output LOW Voltage
Output Off Current HIGH
Output Off Current LOW
Bn
74
VCC = MIN
VOUT = 2.7 V
VOUT = 0.5 V
VCC = MAX, VIN = 2.7 V
VCC = 0 V, VIN = 7.0 V
VCC = MAX, VIN = 5.5 V
VCC = MAX, VIN = 0.5 V
VCC = MAX VOUT = GND
MAX,
Vout = HIGH
T/R = 4.5 V
IIH
Input HIGH C
I
Current
OE, T/R
Others
IIL
IOS
Input LOW Current
Output Short Circuit Current2
OE, T/R
A0 – A7
B0 – B7
ICCH
– 225
85
120
100
A
mA
ICC
P
l Current
Power S
Supply C
ICCL
ICCZ
Vout = LOW
T/R = 0 V
OE = 4.5 V
Vout = HIGH Z
VCC = MAX
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
LAST ORDER 31/03/99
VOL
Output LOW Voltage
An
74
VCC = MIN
LAST SHIP 30/09/99
GUARANTEED OPERATING RANGES
LIFETIME BUY
Mfax is a trademark of Motorola, Inc.
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or
guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application
or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages.
“Typical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual
performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s
technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed,
intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support
or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death
may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and
hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses,
and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or
unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
How to reach us:
USA/EUROPE/Locations Not Listed:
Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217.
1–303–675–2140 or 1–800–441–2447
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81–3–3440–3569
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LAST ORDER 31/03/99
LAST SHIP 30/09/99
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