Order this document by MC14C89B/D
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.
QUAD LOW POWER
LINE RECEIVERS
SEMICONDUCTOR
TECHNICAL DATA
Features:
• Low Power Consumption
•
•
•
•
•
•
•
•
•
P SUFFIX
PLASTIC PACKAGE
CASE 646
Meets EIA–232–E, EIA–562, and CCITT V.28 Recommendations
TTL/CMOS Compatible Outputs
Standard Power Supply: + 5.0 V ±10%
D SUFFIX
PLASTIC PACKAGE
CASE 751A
(SO–14)
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
PIN CONNECTIONS
Operating Ambient Temperature: –40° to +85°C
Representative Block Diagram
(Each Receiver)
VCC
Input A
1
14 VCC
Response
Control A
2
13 Input D
Output A
3
12 Response
Control D
Input B
4
11 Output D
Response
Control B
5
10 Input C
Output B
6
9
Response
Control C
Ground
7
8
Output C
(Top View)
Input
Response
Control
Output
ORDERING INFORMATION
Device
Operating
Temperature Range
MC14C89BP
MC14C89ABP
MC14C89ABD
Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
Package
Plastic DIP
TA = – 40° to +85°C
Plastic DIP
SO–14
Rev 0
1
MC14C89B, AB
MAXIMUM RATINGS
Rating
Symbol
Value
VCC
+ 7.0
– 0.5
Input Voltage
Vin
± 30
Vdc
Output Load Current
IO
Self–Limiting
–
Junction Temperature
TJ
–65, +150
°C
Power Supply Voltage
VCC(max)
VCC(min)
Unit
Vdc
Devices should not be operated at these limits. The “Recommended Operating Conditions” table provides
for actual device operation.
RECOMMENDED OPERATING CONDITIONS
Characteristic
Symbol
Power Supply Voltage
Min
Typ
Max
Unit
VCC
4.5
5.0
5.5
Vdc
Input Voltage
Vin
–25
–
25
Vdc
Output Current Capability
IO
–7.5
–
6.0
mA
Operating Ambient Temperature
TA
–40
–
85
°C
Min
Typ
Max
Unit
–
330
700
3.5
3.5
2.5
2.5
3.8
4.8
3.7
4.7
–
–
–
–
–
–
0.1
0.1
0.4
0.4
–35
–
–13.9
+10.3
–
35
0.75
1.6
0.75
1.0
0.95
1.90
0.95
1.3
1.25
2.25
1.25
1.5
Vdc
3.0
5.5
7.0
kΩ
Min
Typ
Max
Unit
–
0.08
0.30
µs
–
–
3.35
2.55
6.0
6.0
µs
1.0
1.5
–
µs
All limits are not necessarily functional concurrently.
ELECTRICAL CHARACTERISTICS (–40°C
TA +85°C, unless otherwise noted.)*
Characteristic
Symbol
Supply Current (Iout = 0)
ICC @ +4.5 V
VCC
+5.5 V
ICC
Output Voltage – High, Vin
0.4 V (See Figures 2 and 3)
Iout = –20 µA
VCC = 4.5 V
VCC = 5.5 V
Iout = –3.2 mA
VCC = 4.5 V
VCC = 5.5 V
Output Voltage – Low, Vin
2.4 V
Iout = 3.2 mA
VCC = 4.5 V
VCC = 5.5 V
VOH
Output Short Circuit Current** (VCC = 5.5 V, see Figure 4)
Normally High Output shorted to ground
Normally Low Output shorted to VCC
IOS
Vdc
VOL
Input Threshold Voltage (VCC = 5.0 V)
(MC14C89AB, see Figure 5)
Low Level
High Level
(MC14C89B, see Figure 6)
Low Level
High Level
Input Impedance (+4.5 V
µA
VIL
VIH
VIL
VIH
VCC +5.5 V –25 V Vin +25 V)
mA
* * Typicals reflect performance @ TA = 25°C
**Only one output shorted at a time, for not more than 1.0 seconds.
TIMING CHARACTERISTICS (TA = +25°C, unless otherwise noted.)
Characteristic
Output Transition Time (10% to 90%)
4.5 V
VCC
5.5 V
Propagation Delay Time
4.5 V
VCC
5.5 V
Output Low–to–High
Output High–to–Low
Input Noise Rejection (see Figure 9)
2
Symbol
tT
tPLH
tPHL
MOTOROLA ANALOG IC DEVICE DATA
MC14C89B, AB
Figure 1. Timing Diagram
3.0 V
1.5 V
S.G.
0V
VCC
tPLH
tPHL
50 pF
S.G.
VOH
90%
Vout
RC
(Open)
NOTES: S.G. set to: f = 20 kHz;
Duty Cycle = 50%;
tr , tf
5.0 ns
p
Vout
50%
50%
10%
tT
VOL
tT
STANDARDS COMPLIANCE
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.
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
Parameter
EIA–232–E
EIA–562
Max Data Rate
20 kBaud
38.4 kBaud Asynchronous
64 kBaud Synchronous
Max Cable Length
50 feet
Based on cable capacitance/data rate
Transition Region
–3.0 V to +3.0 V
–3.0 V to +3.0 V
MARK (one, off)
More negative than –3.0 V
More negative than –3.3 V
SPACE (zero, on)
More positive than +3.0 V
More positive than +3.3 V
Fail Safe
Output = Binary 1
Output = Binary 1
Open Circuit Input Voltage
Slew Rate (at the driver)
Loaded Output Voltage (at the driver)
t 2.0 V
p30 V/µs anywhere on the waveform
p
p
5.0 V
VO 15 V for loads between
3.0 kΩ and 7.0 kΩ
Figure 2. Typical Output versus Supply Voltage
5.0
VOH(Iout = –20 µA)
3.0
4.0
MC14C89AB
MC14C89B
TA = 25°C
VO , OUTPUT VOLTAGE (V)
VO , OUTPUT VOLTAGE (V)
VOH(Iout = –3.2 mA)
VOH(Iout = –20 µA)
VOH(Iout = –3.2 mA)
3.0
2.0
MC14C89AB
MC14C89B
VCC = 5 V
2.0
1.0
0
4.5
p30 V/µs anywhere on the waveform,
q4.0 V/µs between +3.0 V and –3.0 V
VO q 3.7 V for a load of 3.0 kΩ
Figure 3. Typical Output Voltage versus Temperature
5.0
4.0
Not Specified
1.0
VOL(Iout = 3.2 mA)
VOL(Iout = 3.2 mA)
4.7
4.9
5.1
VCC, SUPPLY VOLTAGE (V)
MOTOROLA ANALOG IC DEVICE DATA
5.3
5.5
0
–40
25
–7.5
57.5
TA, AMBIENT TEMPERATURE (°C)
85
3
MC14C89B, AB
Figure 4. Typical Short Circuit Current
versus Temperature
Figure 5. Typical Threshold Voltage
versus Temperature
2.0
INPUT THRESHOLD VOLTAGE (Vdc)
SHORT CIRCUIT CURRENT (mA)
15
10
Normally Low Output Shorted to VCC
5.0
0
MC14C89AB
MC14C89B
VCC = 5.5 V
–5.0
–10
–15
–40
Normally High Output Shorted to Ground
–7.5
25
57.5
TA, AMBIENT TEMPERATURE (°C)
VIH
1.8
t
MC14C89AB
4.5 V VCC
1.6
1.4
1.2
1.0
VIL
0.8
–40
85
57.5
25
–7.5
TA, AMBIENT TEMPERATURE (°C)
Figure 6. Typical Threshold Voltage
versus Temperature
t 5.5 V
INPUT THRESHOLD VOLTAGE (Vdc)
1.8
1.6
1.4
VIH
1.2
1.0
VIL
0.8
–40
–7.5
RC
RRC
4.0
VIL @ Vbat = –10 V
+
3.0
– Vbat
2.0
VIL @ Vbat = –3.0 V
1.0
Nominal VIL
4.5 V
0
25
57.5
85
10 kΩ
0
TA, AMBIENT TEMPERATURE (°C)
20 kΩ
30 kΩ
t VCC t 5.5 V
40 kΩ
50 kΩ
BIAS RESISTANCE (RRC)
Figure 8. Typical Noise Pulse Rejection
5.0
Ein , PULSE AMPLITUDE (V)
INPUT THRESHOLD VOLTAGE (Vdc)
t
MC14C89B
4.5 V VCC
85
Figure 7. Typical Effect of Response
Control Pin Bias
5.0
2.0
t 5.5 V
MC14C89AB
MC14C89B
Pulse Rate = 300 kHz
RC Pin Open
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)
4
MOTOROLA ANALOG IC DEVICE DATA
MC14C89B, AB
APPLICATIONS INFORMATION
Description
The MC14C89AB and MC14C89B are designed to be
direct replacements for the MC1489A and MC1489. Both
devices meet all EIA–232 specifications and also the faster
EIA–562 and CCITT V.28 specifications. Noise pulse
rejection circuitry eliminates the need for most response
control filter capacitors but does not exclude the possibility as
filtering is still possible at the Response Control (RC) pins.
Also, the Response Control pins allow for a user defined
selection of the threshold voltages. The MC14C89AB and
MC14C89B are manufactured with a bipolar technology
using low power techniques and consume at most 700 mA,
plus load currents with a +5.0 V supply.
MC14C89B or 0.95 V for the MC14C89AB). Figure 7 plots
equation (1) for two values of Vbat and a range of RRC.
If an RC pin is to be used for low pass filtering, the
capacitor chosen can be calculated by the equation,
C
RC
]
1
2.02 kW 2p f
Table 1. Function Table
Receivers
Input*
Output*
H
L
L
H
*The asterisk denotes A, B, C, or D.
Receiver Inputs and Response Control
The receiver inputs determine the state of the outputs in
accordance with Table 1. The nominal VIL and VIH
thresholds are 0.95 V and 1.90 V respectively for the
MC14C89AB. For the MC14C89B, the nominal VIL and VIH
thresholds are 0.95 and 1.30, respectively. The inputs are
able to withstand ±30 V referenced to ground. Should the
input voltage exceed ground by more than ± 30 V, excessive
currents will flow at the input pin. Open input pins will
generate a logic high output, but good design practices
dictate that inputs should never be left open.
The Response Control (RC) pins are coupled to the inputs
through a resistor string. The RC pins provide for adjustment
of the threshold voltages of the IC while preserving the
amount of hysteresis. Figure 10 shows a typical application
to adjust the threshold voltages. The RC pins also provide
access to an internal resistor string which permits low pass
filtering of the input signal within the IC. Like the input pins,
the RC pins should not be taken above or below ground by
more than ± 30 V or excessive currents will flow at these pins.
The dependence of the low level threshold voltage (VIL) upon
RRC and Vbat can be described by the following equation:
V
IL
NJȡ ƪ
]
V 0.09
ȧȢ
5.32 kW
* Vbat
R
RC
ȣȧ
Ȥ
W
) 2.02 kW
505
(1.6)
) 6.67 R 106 W2
505
W
RC
ƫNj
(1)
VIH can be found by calculating for VIL using equation (1)
then adding the hysteresis for each device (0.35 for the
MOTOROLA ANALOG IC DEVICE DATA
*3dB
where f–3 dB represents the desired –3 dB role–off frequency
of the low pass filter.
Figure 9. Application to Adjust Thresholds
Input Pin
Outputs
The output low or high voltage depends on the state of the
inputs, the load current, the bias of the Response Control
pins, and the supply voltage. Table 1 applies to each receiver,
regardless of how many other receivers within the package
are supplying load current.
(2)
Response Control Pin
RRC
+
–
Vbat
Another feature of the MC14C89AB and MC14C89B is
input noise rejection. The inputs have the ability to ignore
pulses which exceed the VIH and VIL thresholds but are less
than 1.0 ms in duration. As the duration of the pulse exceeds
1.0 ms, the noise pulse may still be ignored depending on its
amplitude. Figure 8 is a graph showing typical input noise
rejection as a function of pulse amplitude and pulse duration.
Figure 8 reflects data taken for an input with an unconnected
RC pin and applied to the MC14C89AB and MC14C89B.
Operating Temperature Range
The ambient operating temperature range is listed as
–40°C to +85°C, and the devices are designed to meet the
EIA–232–E, EIA–562 and CCITT V.28 specifications over
this temperature range. The timing characteristics are
guaranteed to meet the specifications at +25°C. The
maximum ambient operating temperature is listed as +85°C.
However, a lower ambient may be required depending on
system use (i.e., specifically how many receivers within a
package are used), and at what current levels they are
operating. The maximum power which may be dissipated
within the package is determined by:
PD
+
(max)
T
– T
J(max)
A
R
qJA
where: RθJA = thermal resistance (typ., 100°C/W for the
DIP and 125°C/W for the SOIC packages);
TJ(max) = maximum operating junction temperature
(150°C); and
TA = ambient temperature.
PD = {[(VCC – VOH) IOH] or
[(VOL) IOL]} each receiver + (VCC ICC)
where: VCC = positive supply voltage;
VOH, VOL = measured or estimated from Figure 2
and 3;
ICC = measured quiescent supply current.
As indicated, the first term (in brackets) must be calculated
and summed for each of the four receivers, while the last
term is common to the entire package.
5
MC14C89B, AB
OUTLINE DIMENSIONS
P SUFFIX
PLASTIC PACKAGE
CASE 646–06
ISSUE L
14
NOTES:
1. LEADS WITHIN 0.13 (0.005) RADIUS OF TRUE
POSITION AT SEATING PLANE AT MAXIMUM
MATERIAL CONDITION.
2. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
3. DIMENSION B DOES NOT INCLUDE MOLD
FLASH.
4. ROUNDED CORNERS OPTIONAL.
8
B
1
7
A
F
DIM
A
B
C
D
F
G
H
J
K
L
M
N
L
C
J
N
H
G
D
SEATING
PLANE
K
M
D SUFFIX
PLASTIC PACKAGE
CASE 751A–03
(SO–14)
ISSUE F
–A–
14
1
P 7 PL
0.25 (0.010)
7
G
M
F
–T–
D 14 PL
0.25 (0.010)
M
K
M
T B
S
M
R X 45 _
C
SEATING
PLANE
B
A
S
MILLIMETERS
MIN
MAX
18.16
19.56
6.10
6.60
3.69
4.69
0.38
0.53
1.02
1.78
2.54 BSC
1.32
2.41
0.20
0.38
2.92
3.43
7.62 BSC
0_
10_
0.39
1.01
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
8
–B–
INCHES
MIN
MAX
0.715
0.770
0.240
0.260
0.145
0.185
0.015
0.021
0.040
0.070
0.100 BSC
0.052
0.095
0.008
0.015
0.115
0.135
0.300 BSC
0_
10_
0.015
0.039
J
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN
MAX
8.55
8.75
3.80
4.00
1.35
1.75
0.35
0.49
0.40
1.25
1.27 BSC
0.19
0.25
0.10
0.25
0_
7_
5.80
6.20
0.25
0.50
INCHES
MIN
MAX
0.337
0.344
0.150
0.157
0.054
0.068
0.014
0.019
0.016
0.049
0.050 BSC
0.008
0.009
0.004
0.009
0_
7_
0.228
0.244
0.010
0.019
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
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Opportunity/Affirmative Action Employer.
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51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
6
◊
*MC14C89B/D*
MOTOROLA ANALOG IC DEVICE
DATA
MC14C89B/D