T
75°C
The MC1489 monolithic quad line receivers are designed to interface data
terminal equipment with data communications equipment in conformance
with the specifications of EIA Standard No. EIA–232D.
• Input Resistance – 3.0 k to 7.0 kΩ
• Input Signal Range – ± 30 V
• Input Threshold Hysteresis Built In
• Response Control
a) Logic Threshold Shifting
b) Input Noise Filtering
ORDERING INFORMATION
Operating
Device
MC1489P, AP
MC1489D, AD
Temperature Range
= 0 to +
A
°
Package
Plastic
SO–14
Order this document by MC1489/D
QUAD MDTL
LINE RECEIVERS
EIA–232D
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 646
D SUFFIX
PLASTIC PACKAGE
CASE 751A
(SO–14)
Line Driver
MC1488
MDTL Logic Input
Response Control 2
Simplified Application
Interconnecting
Cable
Interconnecting
Cable
Representative Schematic Diagram
Line Receiver
MC1489
MDTL Logic Output
(1/4 of Circuit Shown)
9.0 k
R
F
5.0 k
PIN CONNECTIONS
1
Input A
Response
2
Control A
3
Output A
4
Input B
Response
5
Control B
Output B
6
Ground
7
1.7 k
14
V
CC
3 Output
14
13
12
11
10
9
8
V
CC
Input D
Response
Control D
Output D
Input C
Response
Control C
Output C
Input 1
MC1489 MC1489A
RF6.7 kΩ 1.6 kΩ
MOTOROLA ANALOG IC DEVICE DATA
3.8 k
10 k
7 GND
Motorola, Inc. 1996 Rev 5
1
MC1489, A
MAXIMUM RATINGS (T
Power Supply Voltage V
Input Voltage Range V
Output Load Current I
= + 25°C, unless otherwise noted)
A
Rating
Symbol Value Unit
CC
IR
L
10 Vdc
± 30 Vdc
20 mA
Power Dissipation (Package Limitation, SO–14
and Plastic Dual In–Line Package)
Derate above TA = + 25°C
Operating Ambient Temperature Range T
Storage Temperature Range T
ELECTRICAL CHARACTERISTICS (Response control pin is open.) (V
P
D
1/
θJA
A
stg
1000
6.7
mW/°C
0 to + 75 °C
– 65 to + 175 °C
= + 5.0 Vdc ± 10%, TA = 0 to + 75°C, unless otherwise noted)
CC
Characteristics
Positive Input Current (VIH = + 25 Vdc)
(VIH = + 3.0 Vdc)
Negative Input Current (VIH = – 25 Vdc)
(VIH = – 3.0 Vdc)
Input Turn–On Threshold Voltage
(TA = + 25°C, VOL p 0.45 V)
MC1489
MC1489A
Input Turn–Off Threshold Voltage
(TA = + 25°C, VOH q 2.5 V, IL = – 0.5 mA) MC1489
MC1489A
Output Voltage High (VIH = 0.75 V, IL = – 0.5 mA)
(Input Open Circuit, IL = – 0.5 mA)
Output Voltage Low (VIL = 3.0 V, IL = 10 mA) V
Output Short–Circuit Current I
Power Supply Current (All Gates “on,” I
= 0 mA, VIH = + 5.0 Vdc) I
out
Power Consumption (VIH = + 5.0 Vdc) P
SWITCHING CHARACTERISTICS (V
Propagation Delay Time
= 5.0 Vdc ± 1%, TA = + 25°C, See Figure 1.)
CC
(RL = 3.9 kΩ) t
Rise Time (RL = 3.9 kΩ) t
Propagation Delay Time (RL = 390 kΩ) t
Fall Time (RL = 390 kΩ) t
mW
Symbol Min Typ Max Unit
I
I
V
V
V
OS
CC
PLH
TLH
PHL
THL
IH
IL
IH
IL
OH
OL
C
3.6
0.43
– 3.6
– 0.43
1.0
1.75
0.75
0.75
2.5
2.5
–
–
–
–
–
1.95
–
0.8
4.0
4.0
8.3
–
– 8.3
–
1.5
2.25
1.25
1.25
5.0
5.0
– 0.2 0.45 Vdc
– – 3.0 – 4.0 mA
– 16 26 mA
– 80 130 mW
– 25 85 ns
– 120 175 ns
– 25 50 ns
– 10 20 ns
mA
mA
Vdc
Vdc
Vdc
Figure 1. Switching Response
5.0 Vdc
R
L
E
in
3.0 V
E
in
E
O
50% 50%
t
PLH
t
t
THL
1.5 V
CL = 15 pF = total parasitic capacitance which includes
probe and wiring capacitances
TLH
1.5 V
2
All diodes
1N3064
or equivalent
C
L
t
TLH
TEST CIRCUITS
E
o
and t
THL
measured
10% – 90%
Figure 2. Response Control Node
C
1/4
V
in
MC1489A
C, capacitor is for noise filtering.
R, resistor is for threshold shifting.
MOTOROLA ANALOG IC DEVICE DATA
V
R
R
Response Node
V
O
MC1489, A
TYPICAL CHARACTERISTICS
(VCC = 5.0 Vdc, TA = +25°C, unless otherwise noted)
–2.0
–4.0
L
I , INPUT CURRENT (mA)
–6.0
–8.0
–10
O
V , OUTPUT VOL TAGE (Vdc)
Figure 3. Input Current
10
8.0
6.0
4.0
2.0
0
I
I
V
I
–20 –15 –10 –5.0 5.0 15 2520
–25
Vin, INPUT VOLTAGE (V)
0
Figure 5. MC1489A Input Threshold
V oltage Adjustment
6.0
5.0
4.0
3.0
2.0
1.0
R
T
5.0 k
V
th
5.0 V
0
R
T
1
V
V
ILH
1.0 2.00 4.0–2.0 –1.0–3.0
VI, INPUT VOLTAGE (V)
IHL
R
T
11 k
V
th
–5.0 V
3.0
10
Figure 4. MC1489 Input Threshold
V oltage Adjustment
6.0
5.0
4.0
3.0
2.0
1.0
O
V , OUTPUT VOL TAGE (Vdc)
0
R
T
5.0 k
V
th
5.0 V
R
R
T
T
13 k
1
V
th
5.0 V
V
ILH
VI, INPUT VOLTAGE (V)
V
–5.0 V
IHL
R
11 k
V
T
th
V
I
3.02.01.00–2.0 –1.0–3.0
E
O
R
T
V
th
Figure 6. Input Threshold V oltage
versus T emperature
2.4
2.2
V
in
E
O
R
T
V
th
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
IH
V , INPUT THRESHOLD VOLTAGE (Vdc)
0
T, TEMPERATURE (
MC1489A V
MC1489 V
MC1489 V
°
C)
IH
IL
MC1489A V
IH
IL
+120+600–60
2.0
1.0
INPUT THRESHOLD VOLTAGE (Vdc)
0
3.0
MOTOROLA ANALOG IC DEVICE DATA
Figure 7. Input Threshold versus
Power Supply Voltage
VIH MC1489A
VIH MC1489
VIL MC1489
VIL MC1489A
4.0 5.0 6.0
VCC, POWER SUPPLY VOLTAGE (V)
3
MC1489, A
APPLICATIONS INFORMATION
General Information
The Electronic Industries Association (EIA) has released
the EIA–232D specification detailing the requirements for the
interface between data processing equipment and data
communications equipment. This standard specifies not only
the number and type of interface leads, but also the voltage
levels to be used. The MC1488 quad driver and its
companion circuit, the MC1489 quad receiver, provide a
complete interface system between DTL or TTL logic levels
and the EIA–232D defined levels. The EIA–232D
requirements as applied to receivers are discussed herein.
The required input impedance is defined as between
3000 Ω and 7000 Ω for input voltages between 3.0 and 25 V
in magnitude; and any voltage on the receiver input in an
open circuit condition must be less than 2.0 V in magnitude.
The MC1489 circuits meet these requirements with a
maximum open circuit voltage of one VBE.
The receiver shall detect a voltage between – 3.0 and
– 25 V as a Logic “1” and inputs between 3.0 and 25 V as a
Logic “0.” On some interchange leads, an open circuit of
power “OFF” condition (300 Ω or more to ground) shall be
decoded as an “OFF” condition or Logic “1.” For this reason,
the input hysteresis thresholds of the MC1489 circuits are all
above ground. Thus an open or grounded input will cause the
same output as a negative or Logic “1” input.
Device Characteristics
The MC1489 interface receivers have internal feedback
from the second stage to the input stage providing input
hysteresis for noise rejection. The MC1489 input has typical
turn–on voltage of 1.25 V and turn–off of 1.0 V for a typical
hysteresis of 250 mV. The MC1489A has typical turn–on of
1.95 V and turn–off of 0.8 V for typically 1.15 V of hysteresis.
Each receiver section has an external response control
node in addition to the input and output pins, thereby allowing
the designer to vary the input threshold voltage levels. A
resistor can be connected between this node and an external
power supply . Figures 2, 4 and 5 illustrate the input threshold
voltage shift possible through this technique.
This response node can also be used for the filtering of
high frequency, high energy noise pulses. Figures 8 and 9
show typical noise pulse rejection for external capacitors of
various sizes.
These two operations on the response node can be
combined or used individually for many combinations of
interfacing applications. The MC1489 circuits are particularly
useful for interfacing between MOS circuits and MDTL/MTTL
logic systems. In this application, the input threshold voltages
are adjusted (with the appropriate supply and resistor values)
to fall in the center of the MOS voltage logic levels (see
Figure 10).
The response node may also be used as the receiver input
as long as the designer realizes that he may not drive this
node with a low impedance source to a voltage greater than
one diode above ground or less than one diode below
ground. This feature is demonstrated in Figure 11 where two
receivers are slaved to the same line that must still meet the
EIA–232D impedance requirement.
Figure 8. T ypical Turn On Threshold versus
Capacitance from Response Control Pin to GND
6
MC1489
in
E , AMPLITUDE (V)
5
4
3
2
1
10 pF
100 pF
300 pF
PW, INPUT PULSE WIDTH (ns)
500 pF
Figure 9. T ypical Turn On Threshold versus
Capacitance from Response Control Pin to GND
6
MC1489A
5
12 pF
4
3
in
E , AMPLITUDE (V)
2
10,000100010010
1
100 pF 300 pF
PW, INPUT PULSE WIDTH (ns)
500 pF
10,000100010010
4
MOTOROLA ANALOG IC DEVICE DATA
MC1489, A
Figure 10. T ypical Translator Application –
MOS to DTL or TTL
+5.0 Vdc
R
MC1489
+5.0 Vdc
DTL or TTL
+5.0 Vdc
–V
GG
MOS
Logic
–V
DD
Figure 11. Typical Paralleling of Two MC1489, A Receivers to Meet EIA–232D
V
CC
Response–Control Pin
Input
8.0 k
1/2 MC1489
Output
V
Input
Response–Control Pin
8.0 k
CC
Output
MOTOROLA ANALOG IC DEVICE DATA
5
–T–
SEATING
PLANE
MC1489, A
OUTLINE DIMENSIONS
PLASTIC PACKAGE
CASE 646–06
14 8
B
17
A
F
C
N
HG D
–A–
14 8
–B–
71
G
D 14 PL
0.25 (0.010) A
M
T
K
B
SEATING
PLANE
P 7 PL
C
S
K
PLASTIC PACKAGE
CASE 751A–03
0.25 (0.010) B
R X 45
S
P SUFFIX
ISSUE L
L
J
M
D SUFFIX
(SO–14)
ISSUE F
M
M
_
M
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.
DIM MIN MAX MIN MAX
A 0.715 0.770 18.16 19.56
B 0.240 0.260 6.10 6.60
C 0.145 0.185 3.69 4.69
D 0.015 0.021 0.38 0.53
F 0.040 0.070 1.02 1.78
G 0.100 BSC 2.54 BSC
H 0.052 0.095 1.32 2.41
J 0.008 0.015 0.20 0.38
K 0.1 15 0.135 2.92 3.43
L 0.300 BSC 7.62 BSC
M 0 10 0 10
____
N 0.015 0.039 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.
F
J
DIM MIN MAX MIN MAX
A 8.55 8.75 0.337 0.344
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.054 0.068
D 0.35 0.49 0.014 0.019
F 0.40 1.25 0.016 0.049
G 1.27 BSC 0.050 BSC
J 0.19 0.25 0.008 0.009
K 0.10 0.25 0.004 0.009
M 0 7 0 7
P 5.80 6.20 0.228 0.244
R 0.25 0.50 0.010 0.019
MILLIMETERSINCHES
INCHESMILLIMETERS
____
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. “T ypical” 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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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
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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
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Opportunity/Affirmative Action Employer.
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6
◊
MOTOROLA ANALOG IC DEVICE DATA
MC1489/D
*MC1489/D*
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