INTEGRATED CIRCUITS
74F545
Octal bidirectional transceiver (with
3-State inputs/outputs)
Product specification
IC15 Data Handbook
1990 Mar 01
Philips
Semiconductors
Philips Semiconductors
Product specification
Octal bidirectional transceiver (with 3-State inputs/outputs)
74F545
FEATURES
•
High impedance NPN base inputs for reduced loading
(70µA in High and Low states) output
PIN CONFIGURATION
A0
A1
A2
A3
A4
A5
A6
1
2
3
4
5
6
7
8
9
20 V
CC
19 B0
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 T/R
•
8-bit bidirectional data flow reduces system package count
•
3-State inputs/outputs for interfacing with bus oriented systems
•
24mA and 64mA bus drive capability on A and B ports,
respectively
•
Transmit/Receive and Output Enable simplify control logic
DESCRIPTION
The 74F545 is an 8-bit, 3-State, high speed transceiver. It provides
bidirectional drive for the bus-oriented microprocessor and digital
communications systems. Straight through bidirectional transceivers
are featured, with 24mA bus drive capability on the A ports and
64mA bus drive capability on the B ports. One input,
Transmit/Receive (T/R) determines the direction of logic signals
through the bidirectional transceiver. Transmit enables data from A
ports to B ports; Receive enables data from B ports to A ports. The
Output Enable input disables both A and B ports by placing them in
a 3-State condition. The 74F545 performs the same function as the
74F245, the only difference being package pin assignment.
A7
OE
GND 10
SF01032
TYPE
74F545
TYPICAL
PROPAGATION DELAY
4.0ns
TYPICAL SUPPLY
CURRENT
(TOTAL)
87mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL
RANGE
V
CC
= 5V
±10%,
T
amb
= 0°C to +70°C
N74F545N
N74F545D
PKG DWG #
20-Pin Plastic DIP
20-Pin Plastic SOL
SOT146-1
SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
A0–A7, B0–B7
OE
T/R
A0 - A7
B0 - B7
Data inputs
Output Enable input (active Low)
Transmit/Receive input
Port A 3-State outputs
Port B 3-State outputs
DESCRIPTION
74F(U.L.)
HIGH/LOW
3.5/0.117
2.0/0.067
2.0/0.067
150/40
750/107
LOAD VALUE
HIGH/LOW
70µA/70µA
40µA/40µA
40µA/40µA
3.0mA/24mA
15mA/64mA
NOTE:
One (1.0) FAST Unit Load is defined as: 20µA in the High state and 0.6mA in the Low state.
1990 Mar 01
2
853–0375 98992
Philips Semiconductors
Product specification
Octal bidirectional transceiver (with 3-State inputs/outputs)
74F545
LOGIC SYMBOL
1
2
3
4
5
6
7
8
LOGIC SYMBOL (IEEE/IEC)
9
G3
3EN1
A0
9
11
OE
A1
A2
A3
A4
A5
A6
A7
11
3EN2
1
T/R
1
B0
B1
B2
B3
B4
B5
B6
B7
2
3
2
19
18
17
16
15
14
13
12
V
CC
= Pin 20
GND = Pin 10
19
18
17
16
15
14
13
12
4
SF01033
5
6
7
8
SF01034
LOGIC DIAGRAM
A0
1
A1
2
A2
3
A3
4
A4
5
A5
6
A6
7
A7
8
OE 9
11
T/R
19
V
CC
=
GND =
Pin 20
Pin 10
B0
18
B1
17
B2
B3
16
15
B4
14
B5
13
B6
12
B7
SF01035
FUNCTION TABLE
INPUTS
OE
L
L
H
L
X
Z
=
=
=
=
T/R
L
H
Bus B data to Bus A
Bus A data to Bus B
Z
OUTPUTS
H
X
High voltage level
Low voltage level
Don’t care
High impedance “off” state
1990 Mar 01
3
Philips Semiconductors
Product specification
Octal bidirectional transceiver (with 3-State inputs/outputs)
74F545
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.)
SYMBOL
V
CC
V
IN
I
IN
V
OUT
I
O
OUT
T
amb
T
stg
Supply voltage
Input voltage
Input current
Voltage applied to output in High output state
Current applied to output in Low output state
Operating free-air temperature range
Storage temperature
A0–A7
B0–B7
PARAMETER
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5.0
–0.5 to +5.5
48
128
0 to +70
–65 to +150
UNIT
V
V
mA
V
mA
mA
°C
°C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
V
CC
V
IH
V
IL
I
IK
I
O
OH
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level
High level output current
A0–A7
B0–B7
Low-level
Low level output current
Operating free-air temperature range
A0–A7
B0–B7
0
PARAMETER
LIMITS
MIN
4.5
2.0
0.8
–18
–3
–15
24
64
70
NOM
5.0
MAX
5.5
UNIT
V
V
V
mA
mA
mA
mA
mA
°C
I
O
OL
T
amb
1990 Mar 01
4
Philips Semiconductors
Product specification
Octal bidirectional transceiver (with 3-State inputs/outputs)
74F545
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
A0–A7
B0–B7
V
OH
High-level out ut voltage
output
B0–B7
A0–A7
V
OL
Low-level out ut voltage
output
B0–B7
V
IK
I
I
I
IH
I
IL
I
OZH
+I
IH
I
OZL
+I
IL
I
OS
Input clamp voltage
Input current at
In ut
maximum input voltage
High-level input current
Low-level input current
Off-state output current
High-level voltage applied
Off-state output current
Low-level voltage applied
Short-circuit output
current
3
Supply current (total)
4
A0–A7
B0–B7
I
CCH
I
CC
I
CCL
I
CCZ
V
CC
= MAX
OE, T/R
A0–A7,
B0–B7
OE, T/R
only
TEST CONDITIONS
1
I
OH
= –3mA
I
OH
= –15mA
I
OL
= 24mA
I
OL
= MAX
±10%V
CC
±5%V
CC
±10%V
CC
±5%V
CC
±10%V
CC
±5%V
CC
±10%V
CC
±5%V
CC
0.42
–0.73
LIMITS
MIN
2.4
2.7
2.0
2.0
0.35
0.35
0.50
0.50
0.55
0.55
–1.2
100
1.0
40
–40
70
–70
–60
–100
84
96
96
–150
–225
100
120
120
3.3
TYP
2
MAX
UNIT
V
V
V
V
V
V
V
V
V
µA
mA
µA
µA
µA
µA
mA
µA
mA
mA
mA
V
CC
= MIN,
MIN
MAX,
V
IL
= MAX
V
IH
= MIN
V
CC
= MIN,
MIN
V
IL
= MAX,
MAX
V
IH
= MIN
V
CC
= MIN, I
I
= I
IK
V
CC
= 0.0V, V
I
= 7.0V
V
CC
= 5.5V, V
I
= 5.5V
V
CC
= MAX, V
I
= 2.7V
V
CC
= MAX, V
I
= 0.5V
V
CC
= MAX, V
I
= 2.7V
V
CC
= MAX, V
I
= 0.5V
V
CC
= MAX
T/R=An=4.5V, OE=GND
OE=T/R =Bn=GND
T/R=Bn=GND, OE=4.5V
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value under the recommended operating conditions for the applicable type.
2. All typical values are at V
CC
= 5V, T
amb
= 25°C.
3. Not more than one output should be shorted at a time. For testing I
OS
, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
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
OS
should be performed last.
4. Measure I
CC
with outputs open.
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST
CONDITIONS
T
amb
= +25°C
V
CC
= +5.0V
C
L
= 50pF, R
L
= 500Ω
MIN
TYP
MAX
1.5
3.5
5.5
2.5
4.5
6.5
6.0
8.5
10.5
5.5
8.0
9.5
2.5
5.0
7.0
2.0
4.5
6.5
T
amb
= 0°C to +70°C
V
CC
= +5.0V
±
10%
C
L
= 50pF, R
L
= 500Ω
MIN
MAX
1.5
6.5
2.5
7.0
6.0
11.0
5.5
10.0
2.5
8.0
2.0
7.5
UNIT
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation delay
An to Bn, Bn to An
Output Enable time
to High or Low level
Output Disable time
from High or Low level
Waveform 1
Waveform 2
Waveform 3
Waveform 2
Waveform 3
ns
ns
ns
ns
ns
ns
1990 Mar 01
5
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