HD29050
Dual Differential Line Drivers/ReceiversWith 3 State Outputs
ADE-205-034A (Z)
2nd. Edition
Mar. 1993
Description
The HD29050 features differential line drivers/receivers with three state output designed to meet the spec
of EIA RS-422A and 423A. Each device has two drivers/receivers in a 16 pin package.
The device becomes in enable state when active high for a driver and active low for a receiver.
Features
Driver
•
Built in current restriction when short circuit
•
Power up/down protection.
•
High output current
I
OH
= –40 mA
I
OL
= 40 mA
Receiver
•
Input hysteresis (Typ. 50 mV)
•
In phase input voltage ±200 mV of input sensitivity in the range –7 to +12 V.
HD29050
Pin Arrangement
R1B 1
R1A 2
R1Y 3
R Enable 4
R2Y 5
R2A 6
R2B 7
GND 8
16 V
CC
15 D1A
14 D1Y
13 D1Z
12 D Enable
11 D2Z
10 D2Y
9 D2A
(Top view)
Function Table
Drivers
Input A
L
H
X
Enable
H
H
L
Output Y
L
H
Z
Output Z
H
L
Z
Receivers
Differential Input A – B
V
ID
≥
0.2 V
–0.2 V < V
ID
< 0.2 V
V
ID
≤
–0.2 V
X
H
L
Z
X
?
:
:
:
:
:
High level
Low level
High impedance
Immaterial
Irrelevant
Enable
L
L
H
H
Output Y
H
?
Z
Z
2
HD29050
Absolute Maximum Ratings
Item
Supply Voltage*
1
Input Voltage A, B*
3
Differential Input Voltage*
2
*
3
Output Current*
3
Enable Input Voltage
Input Voltage*
4
Output Applied Voltage*
4
*
5
Operating Temperature Range
Storage Temperature Range
Symbol
V
CC
V
IN
V
ID
I
O
V
IE
V
IN
V
O
Topr
Tstg
Ratings
7
±25
±25
50
5.5
5.5
–1.0 to 7.0
0 to 70
–65 to 150
Unit
V
V
V
mA
V
V
V
°C
°C
Notes: 1. All voltage values except for differential input voltage are with respect to network ground
terminal.
2. Differential input voltage is measured at the noninverting input with respect to the corresponding
inverting input.
3. Only receiver
4. Only driver
5. Z state
6. The absolute maximum ratings are values which must not individually be exceeded, and
furthermore, no two of which may be realized at the same time.
Recommended Operating Conditions
Item
Supply Voltage
In Phase Input Voltage*
1
Differential Input Voltage*
1
Enable Input Voltage
Input Voltage*
2
Operating Temperature
Notes: 1. Only receiver
2. Only driver
Symbol
V
CC
V
IC
V
ID
V
IE
V
IN
Topr
Min
4.75
–7.0
–6.0
0
0
0
Typ
5.0
—
—
—
—
25
Max
5.25
12
6.0
5.25
5.25
70
Unit
V
V
V
V
V
°C
3
HD29050
Electrical Characteristics
(Ta = 0 to +70°C)
Driver
Item
Input Voltage
Symbol
V
IHD
V
ILD
Input Clamp Voltage
Output Voltage
V
IKD
V
OHD
Min
2.0
—
—
2.5
2.4
V
OLD
—
—
Output Leak Current
I
OZD
–100
–100
I
O (Off)
—
—
Input Current
I
ID
I
IHD
I
IHD
Differential Output Voltage
∆
|V
OC
|
|V
OD2
|
∆
|V
OD
|
Short Circuit Output Current*
1
I
OSD
—
—
—
—
2.0
—
–30
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Max
—
0.8
–1.5
—
—
0.45
0.5
100
100
–100
–100
100
20
–360
0.4
—
0.4
–150
Unit
V
V
V
V
V
V
V
µA
µA
µA
µA
µA
µA
µA
V
V
V
mA
V
CC
= 5.25 V, V
O
= 0 V
V
CC
= 4.75 V, I
I
= –18 mA
V
CC
= 4.75 V, I
OH
= –20 mA
V
CC
= 4.75 V, I
OH
= –40 mA
V
CC
= 4.75 V, I
OL
= 20 mA
V
CC
= 4.75 V, I
OL
= 40 mA
V
CC
= 5.25 V, V
O
= 0.5 V,
Enable = 0.8 V
V
CC
= 5.25 V, V
O
= 2.7 V,
Enable = 0.8 V
V
CC
= 0 V, V
O
= –0.25 V
V
CC
= 0 V, V
O
= 6.0 V
V
CC
= 5.25 V, V
I
= 5.25 V
V
CC
= 5.25 V, V
I
= 2.7 V
V
CC
= 5.25 V, V
I
= 0.4 V
Conditions
4
HD29050
Electrical Characteristics
(Ta = 0 to +70°C)
Receiver
Item
Differential Input Threshold
Voltage*
2
Symbol
V
THR
Min
—
–0.2
Input Current
I
IBR
—
—
Output Voltage
V
OHR
V
OLR
2.7
—
Typ
—
—
—
—
—
—
Max
0.2
—
1.0
–0.8
—
0.45
Unit
V
V
mA
mA
V
V
Conditions
V
O
≥
2.7 V
–7.0 V < V
IC
< 12 V
V
O
≤
0.45 V
–7.0 V < V
IC
< 12 V
V
IN
= 12 V, 0 V
≤
V
CC
≤
5.25 V
V
IN
= –7 V, 0 V
≤
V
CC
≤
5.25 V
V
CC
= 4.75 V, I
O
= –400 mA
V
ID
= 0.4 V,–7.0 V < V
ICM
< 12 V
V
CC
= 4.75 V, I
O
= 8.0 mA
V
ID
= –0.4 V,
–7.0 V < V
ICM
< 12 V
V
CC
= 5.25 V, V
O
= 0.4 V
V
ID
= 3.0 V, Enable = 2.0 V
V
CC
= 5.25 V, V
O
= 2.4 V
V
ID
= –3.0 V, Enable = 2.0 V
V
CC
= 5.25 V, V
O
= 0 V
V
ID
= 3.0 V
Output Leak Current
I
OZR
–100
–100
—
—
—
—
—
—
—
—
—
100
100
–85
—
0.8
–100
20
100
–1.5
mA
mA
mA
V
V
µA
µA
µA
V
Short Circuit Output Current*
1
Input Voltage
I
OSR
V
IHE
V
ILE
–15
2.0
—
—
—
—
—
Input Current
I
ILE
I
IHE
I
IE
V
CC
= 5.25 V, V
IL
= 0.4 V
V
CC
= 5.25 V, V
IH
= 2.7 V
V
CC
= 5.25 V, V
IH
= 5.25 V
V
CC
= 4.75, I
I
= –18 mA
Input Clamp Voltage
V
IKE
Supply
Item
Supply Current
Symbol
I
CC
Min
—
Typ
55*
3
Max
80
Unit
mA
Conditions
V
CC
= 5.25 V
Notes: 1. Not more than one output should be shorted at a time, and duration of the short circuit should not
exceed one second.
2. In this table, only the threshold voltage is expressed in algebra.
3. All typical values are at V
CC
= 5 V, Ta = 25°C.
5
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