HD29C3487
Quadruple Differential Line Drivers With 3 State Outputs
ADE-205-587 (Z)
1st. Edition
Dec. 2000
Description
The HD29C3487 features quadruple differential line drivers which satisfy the requirements of EIA standard
RS-422A. This device is designed to provide differential signals with high current capability on bus lines.
The enable input at low level permits the relate output in high impedance state. The output circuit has
active pull up and pull down and is capable of sinking or sourcing 20 mA.
Features
•
TTL input compatibility
•
•
•
•
•
•
•
•
•
Propagation delay time: 6 ns typ
Output to output skew: 0.5 ns typ
High output impedance in power off conditions
Meets EIA standard RS-422A
Operates from a single 5 V supply
Three state outputs
Low power dissipation with CMOS process
Power up and power down protection
Pin to pin compatible with HD293487
HD29C3487
Pin Arrangement
1A 1
1Y 2
1Z 3
1, 2 Output
Enable
16 V
CC
15 4A
14 4Y
13 4Z
12
3,4 Output
Enable
4
2Z 5
2Y 6
2A 7
GND 8
11 3Z
10 3Y
9 3A
(Top view)
Function Table
Input A
Enables
G
H
L
X
H
L
Z
X
:
:
:
:
High level
Low level
High impedance
Irrelevant
H
H
L
Outputs
Y
H
L
Z
Z
L
H
Z
2
HD29C3487
Absolute Maximum Ratings
(Ta = 25°C)
Item
Supply Voltage*
2
Input Voltage
Output Voltage
Power Dissipation
Storage Temperature
Lead Temperature*
3
Output Current
Supply Current
Symbol
V
CC
V
IN
V
OUT
PT
Tstg
Tlead
IOUT
ICC
Ratings
–0.5 to 7.0
–1.5 to VCC + 1.5
–0.5 to VCC + 0.5
500
–65 to 150
260
±150
±150
Unit
V
V
V
mW
°C
°C
mA
mA
Notes: 1. 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.
2. The value is defined as of ground terminal .
3. The value at 1.6 mm away from the package within 10 second, when soldering.
Recommended Operating Conditions
(Ta = –40°C to +85°C)
Item
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature
Input Rise/Fall Time*
1
Note:
Symbol
V
CC
V
IN
V
OUT
Ta
t
r
, t
f
Min
4.5
0
0
–40
—
Typ
5.0
—
—
25
—
Max
5.5
V
CC
V
CC
85
500
Unit
V
V
V
°C
ns
1. This item guarantees maximum limit when one input switches.
3
HD29C3487
Logic Diagram
1Y
1Z
1A
1,2 Output
Enable
2A
2Y
2Z
3Y
3Z
3A
3,4 Output
Enable
4A
4Y
4Z
Electrical Characteristics
(Ta = –40°C to +85°C)
Item
Input Voltage
Symbol
V
IH
V
IL
Output Voltage
V
OH
V
OL
Differential Output Voltage
VT
Min
2.0
—
2.4
—
2.0
Typ*
1
Max
—
—
3.4
0.2
3.1
—
0.8
—
0.4
—
Unit
V
V
V
V
V
V
IN
= V
IH
or V
IL
, I
OH
= –20 mA
V
IN
= V
IH
or V
IL
, I
OL
= 20 mA
R
L
= 100
Ω
V
T
50
Ω
50
Ω
V
OS
Conditions
Change In Magnitude Of
Differential Output Voltage
IV
T
I – IV
T
I
—
—
—
1.8
—
—
200
0.8
±0.5
—
—
—
0.4
3.0
0.4
±1.0
500
2.0
±5.0
V
V
V
µA
µA
mA
µA
V
IN
= V
CC
, GND, V
IH
or V
IL
I
OUT
= 0 mA, V
IN
= V
CC
or GND
I
OUT
= 0 mA, V
IN
= 2.4 V or 0.5 V
V
OUT
= V
CC
or GND, G = V
IL
,
G
= V
IH
V
IN
= V
CC
or GND
V
CC
= 0 V, V
OUT
= 6 V
V
CC
= 0 V, V
OUT
= –0.25 V
Common Mode Output Voltage V
OS
Magnitude Of Common Mode
Output Voltage
Input Current
Supply Current
IV
OS
– V
OS
I —
I
IN
I
CC
I
CC
*
2
—
—
—
—
–30
—
—
Off State Output Current
Short Circuit Output Current
I
OZ
I
SC
*
3
–150 mA
100
mA
Output Current With Power Off I
OFF
I
OFF
–100 mA
Notes: 1. All typical values are at V
CC
= 5 V, Ta = 25°C.
2. 1 input: V
IN
= 2.4 V or 0.5 V, other inputs: V
IN
= V
CC
or GND
4
HD29C3487
3. Not more than one output should be shorted at a time and duration of the short circuit should not
exceed one second.
Switching Characteristics
(Ta = –40°C to +85°C, V
CC
= 5 V ± 10%)
Item
Propagation Delay Time
Symbol
t
PLH
t
PHL
Output To Output Skew
Differential Output Transition
Time
Output Enable Time
Skew
t
TLH
t
THL
t
ZL
t
ZH
Output Disable Time
t
LZ
t
HZ
Power Dissipation Capacitance C
PD
Input Capacitance
C
IN
Min
2.0
2.0
—
—
—
—
—
—
—
—
—
Typ*
1
6.0
6.0
0.5
6.0
6.0
11.0
13.0
5.0
7.0
50.0
6.0
Max
11.0
11.0
2.0
10.0
10.0
19.0
21.0
9.0
11.0
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
pF
pF
Test Circuit (2)
Test Circuit (3)
Conditions
Test Circuit (1)
Test Circuit 1
V
CC
Input
Output
R1
R3
1.5 V
S1
OPEN
R2
Pulse Generator
Z
out
= 50
Ω
V
CC
A
Y
C1
Z
C2
C3
Output
Note:
1.
C1, C2 and C3 (40 pF) includes probe and jig capacitance.
R1 = R2 = 50
Ω,
R3 = 500
Ω
5
