STMICROELECTRONICS MC1489D1013TR

MC1489
MC1489A
Quad line receivers
General features
■
Input resistance –3k to 7kΩ
■
Input signal range ± 30V
■
Input threshold hysteresis built-in
■
Response control:
a) Logic threshold shifting
b) Input noise filtering
DIP
Description
SOP
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 N° RS232C.
Order code
Part Number
April 2006
DIP14
SO14 (Tape & reel)
MC1489P
MC1489D1013TR
MC1489AP
MC1488AD1013TR
Rev 4
1/
www.st.com
17
Contents
MC1489/MC1489A
Contents
1
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6
Typical applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8.1
9
2/17
Device characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
MC1489/MC1489A
1
Diagram
Figure 1.
Schematic diagram
Diagram
3/17
Pin description
2
Pin description
Figure 2.
Pin connections
4/17
MC1489/MC1489A
MC1489/MC1489A
Maximum ratings
3
Maximum ratings
Table 1.
Absolute maximum ratings
Symbol
Parameter
Value
Unit
VS
Power supply voltage
10
V
VI
Input voltage range
±30
V
IOL
Output load current
20
mA
PTOT
Power dissipation
1
W
Tamb
Operating ambient temperature
0 to 75
°C
Tstg
Storage temperature range
-65 to 150
°C
Note:
Absolute Maximum Ratings are those values beyond which damage to the device may
occur. Functional operation under these condition is not implied.
Table 2.
Thermal data
Symbol
RthJA
Parameter
Thermal resistance junction-ambient Max
Plastic DIP14
SO14
Unit
200
165
°C/W
5/17
Electrical characteristics
MC1489/MC1489A
4
Electrical characteristics
Table 3.
Electrical characteristics (Response control pin in open; VS = 5V, Tamb = 0 to 75°C, unless
otherwise specified)
Symbol
Parameter
Test Conditions
Min.
VIH = 25 V
3.6
VIH = 3 V
0.43
VIL = - 25 V
-3.6
VIL = - 3 V
-0.43
Typ.
Max.
Unit
8.3
IIH
Positive input current
IIL
Negative input current
VIH
Input turn-on threshold
voltage
Tamb = 25°C,
VOL ≤ 0.45 V
IL = 10 mA
VIL
Input turn-off threshold
voltage
Tamb = 25°C, VOL ≥ 2.5 V IL = -0.5 mA
0.75
4
5
Output voltage high
VIH = 0.75 V, IL = -0.5 mA
2.5
VOH
IL = 0.5 mA Input Open Circuit
2.5
4
5
VOL
Output voltage low
0.2
0.45
V
IOS
Output short circuit
current
-3
-4
mA
mA
-8.3
mA
for MC1489
1
1.5
V
for MC1489A
1.75
1.95
2.25
1.25
V
V
VIL = 3 V, IL = 10 mA
IS
Power supply current
All gates "ON", IO = 0 mA, VIH = 5 V
16
26
mA
PC
Power consumption
VIH = 5 V
80
130
mW
Typ.
Max.
Unit
Table 4.
Switching characteristics (VS = 5V, Tamb = 25°C)
Symbol
Parameter
Test Conditions
Min.
tPLH
Propagation delay time
RL = 3.9 KΩ
25
85
ns
tTHL
Rise time
RL = 3.9 KΩ
120
175
ns
tPHL
Propagation delay time
RL = 390 Ω
25
50
ns
tTHL
Fall time
RL = 390 Ω
10
20
ns
6/17
MC1489/MC1489A
5
Test circuit
Test circuit
Figure 3.
Switching response
Figure 4.
Response control node
C: capacitor is for noise filtering
Figure 5.
Input current
7/17
Test circuit
8/17
MC1489/MC1489A
Figure 6.
Output short-circuit current
Figure 7.
Output voltage and input threshold voltage
Figure 8.
Power supply currents
MC1489/MC1489A
6
Typical applications
Typical applications
Figure 9.
RS232C Data transmission
9/17
Typical characteristics
7
MC1489/MC1489A
Typical characteristics
(VS = 5V, Tamb = 25°C)
Figure 10. Input current vs input voltage
Figure 11. MC1489 Input threshold voltage
adjustment
Figure 12. MC1489A Input threshold voltage
adjustment
Figure 13. Input threshold vs temperature
Figure 14. Input threshold vs power supply
voltage
10/17
MC1489/MC1489A
8
Application information
Application information
The Electronic Industries Association (EIA) has released the RS-232C 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 RS-232C defined levels. The RS-232C requirements as
applied to receivers are discussed herein.
The required input impedance is defined as between 3000Ω and 7000Ω for input voltages
between 3.0 and 25V in magnitude; and any voltage on the receiver input in an open circuit
condition must be less than 2.0V 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 - 25V as a Logic "1" and inputs
between + 3.0 and + 2.5V as a Logic "0". On some interchange leads, an open circuit of
power "OFF" condition (300Ω or more to ground) shall be decoded as an "OFF" condition or
Logic "1". For the 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.
8.1
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 1.25V and turn-off of 1.0 V for a typical hysteresis of 250mV. The MC1489A has
typical turn-on of 1.95V and turn-off of 0.8V for typically 1.15V 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. Figure 4.,
Figure 6. and Figure 7. illustrate the input threshold voltage shift possible through this
technique.
This response node can also be used for the filtering of the high-frequency, high-energy
noise pulses. Figure 11. and Figure 12. 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 may
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 13.).
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 14. where two receivers are slaved to the same line that must still meet the RS-232C
impedance requirement.
11/17
Application information
MC1489/MC1489A
)
Figure 15. Typical turn-on threshold vs
Figure 16. Typical turn-on threshold vs
capacitance from response control
capacitance from response control
pin to GND
pin to GND
Figure 17. Typical paralleling of two MC1489/A Receivers to meet RS-232C
12/17
MC1489/MC1489A
Application information
Plastic DIP-14 MECHANICAL DATA
mm.
inch
DIM.
MIN.
a1
0.51
B
1.39
TYP
MAX.
MIN.
TYP.
MAX.
0.020
1.65
0.055
0.065
b
0.5
0.020
b1
0.25
0.010
D
20
0.787
E
8.5
0.335
e
2.54
0.100
e3
15.24
0.600
F
7.1
0.280
I
5.1
0.201
L
Z
3.3
0.130
1.27
2.54
0.050
0.100
P001A
13/17
Application information
MC1489/MC1489A
SO-14 MECHANICAL DATA
DIM.
mm.
MIN.
TYP
inch
MAX.
MIN.
TYP.
MAX.
A
1.35
1.75
0.053
0.069
A1
0.1
0.25
0.004
0.010
A2
1.10
1.65
0.043
0.065
B
0.33
0.51
0.013
0.020
C
0.19
0.25
0.007
0.010
D
8.55
8.75
0.337
0.344
E
3.8
4.0
0.150
0.157
e
1.27
0.050
H
5.8
6.2
0.228
0.244
h
0.25
0.50
0.010
0.020
L
0.4
1.27
0.016
0.050
k
0°
8°
0°
8°
ddd
0.100
0.004
0016019D
14/17
MC1489/MC1489A
Application information
Tape & Reel SO-14 MECHANICAL DATA
mm.
inch
DIM.
MIN.
A
TYP
MAX.
MIN.
330
MAX.
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
13.2
TYP.
0.504
22.4
0.519
0.882
Ao
6.4
6.6
0.252
0.260
Bo
9
9.2
0.354
0.362
Ko
2.1
2.3
0.082
0.090
Po
3.9
4.1
0.153
0.161
P
7.9
8.1
0.311
0.319
15/17
Revision history
MC1489/MC1489A
9
Revision history
Table 5.
Revision history
Date
Revision
13-Apr-2006
4
16/17
Changes
Order codes has been updated and new template.
MC1489/MC1489A
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