MC14C89B
Quad Low Power
Line Receivers
The MC14C89B and MC14C89AB are low monolithic quad line
receivers using bipolar technology, which conform to the EIA−232−E,
EIA−562 and CCITT V.28 Recommendations. The outputs feature
LSTTL and CMOS compatibility for easy interface to +5.0 V digital
systems. Internal time−domain filtering eliminates the need for
external filter capacitors in most cases.
The MC14C89B has an input hysteresis of 0.35 V, while the
MC14C89AB hysteresis is 0.95 V. The response control pins allow
adjustment of the threshold level if desired. Additionally, an external
capacitor may be added for additional noise filtering.
The MC14C89B and MC14C89AB are available in both a 14 pin
dual−in−line plastic DIP and SOIC package.
Features:
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QUAD LOW POWER
LINE RECEIVERS
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 646
•
•
•
•
•
•
•
•
•
•
Low Power Consumption
Meets EIA−232−E, EIA−562, and CCITT V.28 Recommendations
TTL/CMOS Compatible Outputs
Standard Power Supply: + 5.0 V
±10%
Pin Equivalent to MC1489, MC1489A, TI’s SN75C189/A,
SN75189/A and National Semiconductor’s DS14C89/A
External Filtering Not Required in Most Cases
Threshold Level Externally Adjustable
Hysteresis: 0.35 V for MC14C89B, 0.95 V for MC14C89AB
Available in Plastic DIP, and Surface Mount Packaging
Operating Ambient Temperature:
−40°
to +85°C
Representative Block Diagram
(Each Receiver)
V
CC
D SUFFIX
PLASTIC PACKAGE
CASE 751A
(SO−14)
PIN CONNECTIONS
Input A
Response
Control A
Output A
Input B
Response
Control B
Output B
1
2
3
4
5
6
7
(Top View)
14 V
CC
13 Input D
12 Response
Control D
11 Output D
10 Input C
9
8
Response
Control C
Output C
Input
Ground
Response
Control
Output
ORDERING INFORMATION
Device
MC14C89BP
MC14C89ABP
MC14C89ABD
T
A
=
−
40° to +85°C
Operating
Temperature Range
Package
Plastic DIP
Plastic DIP
SO−14
©
Semiconductor Components Industries, LLC, 2006
July, 2006
−
Rev. 1
1
Publication Order Number:
MC14C89B/D
MC14C89B
MAXIMUM RATINGS
Rating
Power Supply Voltage
V
CC(max)
V
CC(min)
Input Voltage
Output Load Current
Junction Temperature
Symbol
V
CC
V
in
I
O
T
J
Value
+ 7.0
−
0.5
±
30
Self−Limiting
−65,
+150
Vdc
−
°C
Unit
Vdc
Devices should not be operated at these limits. The “Recommended Operating Conditions” table provides
for actual device operation.
RECOMMENDED OPERATING CONDITIONS
Characteristic
Power Supply Voltage
Input Voltage
Output Current Capability
Operating Ambient Temperature
All limits are not necessarily functional concurrently.
Symbol
V
CC
V
in
I
O
T
A
Min
4.5
−25
−7.5
−40
Typ
5.0
−
−
−
Max
5.5
25
6.0
85
Unit
Vdc
Vdc
mA
°C
ELECTRICAL CHARACTERISTICS
(−40°C
p
T
A
p
+85°C, unless otherwise noted.)*
Characteristic
Supply Current (I
out = 0
)
I
CC
@ +4.5 V
p
V
CC
p
+5.5 V
Output Voltage
−
High, V
in
p
0.4 V (See Figures 2 and 3)
I
out
=
−20
μA
V
CC
= 4.5 V
V
CC
= 5.5 V
I
out
=
−3.2
mA
V
CC
= 4.5 V
V
CC
= 5.5 V
Output Voltage
−
Low, V
in
q
2.4 V
I
out
= 3.2 mA
V
CC
= 4.5 V
V
CC
= 5.5 V
Output Short Circuit Current** (V
CC
= 5.5 V, see Figure 4)
Normally High Output shorted to ground
Normally Low Output shorted to V
CC
Input Threshold Voltage (V
CC
= 5.0 V)
(MC14C89AB, see Figure 5)
Low Level
High Level
(MC14C89B, see Figure 6)
Low Level
High Level
Input Impedance (+4.5 V
t
V
CC
t
+5.5 V
−25
V
t
V
in
t
+25 V)
*
* Typicals reflect performance @ T
A
= 25°C
**Only one output shorted at a time, for not more than 1.0 seconds.
Symbol
I
CC
V
OH
Min
−
3.5
3.5
2.5
2.5
−
−
−35
−
0.75
1.6
0.75
1.0
3.0
Typ
330
3.8
4.8
3.7
4.7
0.1
0.1
−13.9
+10.3
0.95
1.90
0.95
1.3
5.5
Max
700
−
−
−
−
0.4
0.4
Unit
μA
Vdc
V
OL
I
OS
mA
−
35
1.25
2.25
1.25
1.5
7.0
Vdc
V
IL
V
IH
V
IL
V
IH
kΩ
TIMING CHARACTERISTICS
(T
A
= +25°C, unless otherwise noted.)
Characteristic
Output Transition Time (10% to 90%)
4.5 V
p
V
CC
p
5.5 V
Propagation Delay Time
4.5 V
p
V
CC
p
5.5 V
Output Low−to−High
Output High−to−Low
Input Noise Rejection (see Figure 9)
Symbol
t
T
Min
−
Typ
0.08
Max
0.30
Unit
μs
t
PLH
t
PHL
−
−
1.0
3.35
2.55
1.5
6.0
6.0
−
μs
μs
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2
MC14C89B
Figure 1. Timing Diagram
3.0 V
S.G.
0V
V
CC
t
PHL
50 pF
S.G.
RC
(Open)
NOTES:
S.G. set to: f = 20 kHz;
Duty Cycle = 50%;
t
r
, t
f
p
5.0 ns
1.5 V
t
PLH
90%
V
OH
V
out
V
out
50%
50%
10%
t
T
t
T
V
OL
STANDARDS COMPLIANCE
The MC14C89B and MC14C89AB are designed to comply with
EIA−232−E (formerly RS−232), the newer EIA−562 (which is a
higher speed version of the EIA−232), and CCITT V.28
Recommendations. EIA−562 was written around modern integrated
circuit technology, whereas EIA−232 retains many of the
specifications written around the electro−mechanical circuitry in use
at the time of its creation. Yet the user will find enough similarities to
allow a certain amount of compatibility among equipment built to the
two standards. Following is a summary of the key specifications
relating to the systems and the receivers.
Parameter
Max Data Rate
Max Cable Length
Transition Region
MARK (one, off)
SPACE (zero, on)
Fail Safe
Open Circuit Input Voltage
Slew Rate (at the driver)
Loaded Output Voltage (at the driver)
20 kBaud
50 feet
−3.0
V to +3.0 V
More negative than
−3.0
V
More positive than +3.0 V
Output = Binary 1
t⎥
2.0
⎜V
p30
V/μs anywhere on the waveform
5.0 V
p
⎥
V
O
⎜p
15 V for loads between
3.0 kΩ and 7.0 kΩ
EIA−232−E
EIA−562
38.4 kBaud Asynchronous
64 kBaud Synchronous
Based on cable capacitance/data rate
−3.0
V to +3.0 V
More negative than
−3.3
V
More positive than +3.3 V
Output = Binary 1
Not Specified
p30
V/μs anywhere on the waveform,
q4.0
V/μs between +3.0 V and
−3.0
V
⎥
V
O
⎜
q
3.7 V for a load of 3.0 kΩ
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MC14C89B
Figure 2. Typical Output versus Supply Voltage
5.0
V
OH
(I
out
= −20
μA)
VO , OUTPUT VOLTAGE (V)
4.0
V
OH
(I
out
= −3.2 mA)
MC14C89AB
MC14C89B
T
A
= 25°C
Figure 3. Typical Output Voltage versus Temperatur
5.0
4.0
V
OH
(I
out
= −20
μA)
V
OH
(I
out
= −3.2 mA)
MC14C89AB
MC14C89B
V
CC
= 5 V
3.0
2.0
1.0
0
4.5
V
OL
(I
out
= 3.2 mA)
4.7
4.9
5.1
V
CC
, SUPPLY VOLTAGE (V)
5.3
5.5
VO , OUTPUT VOLTAGE (V)
3.0
2.0
1.0
V
OL
(I
out
= 3.2 mA)
0
−40
−7.5
57.5
25
T
A
, AMBIENT TEMPERATURE (°C)
85
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4
MC14C89B
Figure 4. Typical Short Circuit Current
versus Temperature
2.0
INPUT THRESHOLD VOLTAGE (Vdc)
1.8
1.6
1.4
1.2
1.0
0.8
−40
V
IL
−7.5
25
57.5
T
A
, AMBIENT TEMPERATURE (°C)
85
V
IH
MC14C89AB
4.5 V
t
V
CC
t
5.5 V
15
SHORT CIRCUIT CURRENT (mA)
10
Figure 5. Typical Threshold Voltage
versus Temperature
Normally Low Output Shorted to V
CC
5.0
0
−5.0
−10
−15
−40
MC14C89AB
MC14C89B
V
CC
= 5.5 V
Normally High Output Shorted to Ground
−7.5
25
57.5
T
A
, AMBIENT TEMPERATURE (°C)
85
Figure 6. Typical Threshold Voltage
versus Temperature
2.0
INPUT THRESHOLD VOLTAGE (Vdc)
INPUT THRESHOLD VOLTAGE (Vdc)
1.8
1.6
1.4
1.2
1.0
V
IL
0.8
−40
0
−7.5
25
57.5
85
0
MC14C89B
4.5 V
t
V
CC
t
5.5 V
5.0
Figure 7. Typical Effect of Response
Control Pin Bias
RC
R
RC
V
IL
@ V
bat
= −10 V
+
− V
bat
4.0
3.0
V
IH
2.0
V
IL
@ V
bat
= −3.0 V
1.0
Nominal V
IL
10 kΩ
20 kΩ
4.5 V
t
V
CC
t
5.5 V
30 kΩ
40 kΩ
50
T
A
, AMBIENT TEMPERATURE (°C)
BIAS RESISTANCE (R
RC
)
Figure 8. Typical Noise Pulse Rejection
5.0
Ein , PULSE AMPLITUDE (V)
4.5
4.0
3.5
3.0
Noise Pulse Rejection
2.5
2.0
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
PW, INPUT PULSE WIDTH (μs)
MC14C89AB
MC14C89B
Pulse Rate = 300 kHz
RC Pin Open
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