HD29468
Triple Line Drivers / Receivers
The HD29468 features line drivers and receivers
for unbalanced transmissions, which meet the specs
of IBM 360 and 370. This device has three drivers
and receivers in one package. Input of driver and
output of receiver are compatible with low power
schottky TTL circuit and operates from a single 5
V power supply. The driver has two types of
enable inputs. Sprius noise can be prevented by
grounding either input when power supply is throw
or cut off. The outputs are protected from short
circuit and the wired logic is available due to
emitter follower from for party
line data bus applications. The device operates at
high speed. Low to high level and high to low level
propagation delay times defference are 10 ns max.
Pin Arrangement
DE
1
1
RI
1
2
RO
1
3
RI
2
4
RO
2
5
RI
3
6
RO
3
7
GND
8
(Top View)
16 V
CC
15 DO
1
14 DI
1
13 DO
2
12 DI
2
11 DO
3
10 DI
3
9
DE
2
Function Table
Driver
Input
DI
L
X
X
H
DE
1
X
L
X
H
DE2
X
X
L
H
Output
DO
L
L
L
H
Receiver
Input
RI
L
H
H : High level
L : Low level
X : Immaterial
Output
RO
H
L
HD29468
Absolute Maximum Ratings
Item
Supply Voltage
Driver Input Voltage
Driver Output Voltage
Receiver Input Voltage
Power Dissipation (Ta = 25
°C)
Operating Temperature
Storage Temperature
*1
HD29468
Symbol
V
CC
V
ID
V
OD
V
IR
DP
FP
T
a
T
stg
Ratings
+7
–0.5 to +7
–0.5 to +7
–0.5 to +7
1000
785
0 to +75
–65 to +150
Unit
V
V
V
V
mW
°C
°C
Notes: 1. The above data were taken by the
∆V
BE
method,mounting on a glass epoxy board
(40
×
40
×
1.6 mm) of 10 % wiring density.
2. 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
Operating Temperature
Symbol
V
CC
T
a
Min
4.75
0
Typ
5.00
Max
5.25
75
Unit
V
°C
2
HD29468
Electrical Characteristics
Driver
(V
CC
= 5.0 V
±5
%, Ta = 0 to +75°C)
Item
High Level Input Voltage
Low Level Input Voltage
Input Clamp Voltage
High Level Output Voltage
Symbol Conditions
V
IH
V
IL
V
IK
V
OH
V
CC
= 4.75 V, I
IN
= –18 mA
V
CC
= 4.75 V, V
IH
= 2.0 V
I
OH
= –59.3 mA (Ta = 25
°C)
V
CC
= 5.25 V, V
IH
= 2.0 V
I
OH
= –78.1 mA
Low Level Output Voltage
V
OL
DI I
IH
DE
Low Level Input Current
DI I
IL
DE
High Level Output Current
Short Circuit Output Current
I
OH
V
CC
=4.75 V, V
IL
= 0 V, V
OH
= 5.0 V
V
CC
= 4.75 V, V
IH
= 4.5 V, V
OH
= 5.0 V
I
OS
V
CC
= 5.25 V, V
IH
= 4.5 V
V
CC
= 5.25 V, V
IL
= 0.4 V
V
CC
= 5.25 V, V
IL
= 0.8 V
I
OL
= –0.24 mA, V
IH
= 4.5 V
V
CC
= 5.25 V, V
IH
= 2.7 V
3.11
Min
2.0
HD29468
Max
Unit
V
0.8
–1.5
V
V
V
4.1
0.15
20
60
–400
–1200
100
100
–30
V
µA
µA
µA
mA
High Level Input Current
Receiver (Ta = 0 to +75
°C
)
Item
High Level Output
Threshold Voltage
Low Level Output
Threshold Voltage
High Level Output Voltage
Symbol Conditions
V
OTH
V
CC
= 4.75 V, V
IL
= 1.15 V
I
OH
= –400
µA
V
CC
= 5.25 V, V
IH
= 1.55 V
I
OL
= 8 mA
V
CC
= 4.75 V, V
IN
: Open
I
OH
= –400
µA
V
CC
= 4.75 V
V
IH
= 1.55 V
Input Resistance
High Level Input Current
Low Level Input Current
Short Circuit Output Current
R
IN
I
IH
I
IL
I
OS
V
CC
= 0 V
V
CC
= 4.75 V, V
IH
= 3.11 V
V
CC
= 5.25 V, V
IL
= 0.15 V
V
CC
= 5.25 V, V
IL
= 0 V
0.04
–20
I
OL
= 8 mA
I
OL
= 4 mA
7.4
2.7
Min
2.7
Max
Unit
V
V
OTL
0.5
V
V
OH
V
Low Level Output Voltage
V
OL
0.5
0.4
20
0.42
–0.24
–100
V
kΩ
mA
mA
mA
3
HD29468
Driver / Receiver (Ta = 0 to +75
°C)
Item
Supply Voltage
Symbol
I
CCH
I
CCL
Conditions
V
CC
= 5.25 V, V
IH
= 4.5 V
V
CC
= 5.25 V, V
IL
= 0 V
Min
HD29468
Max
37
55
Unit
mA
Switching Characteristics
Driver (V
CC
= 5.0 V, Ta = 25°C)
Item
Rise Propagation
Delay Time
Fall Propagation
Delay Time
Propagation Delay
Time Difference
*1
Symbol
t
PLH
Conditions
R
L
= 47.5
Ω
Min
6.5
Max
18.5
Unit
ns
t
PHL
∆t
PD
6.5
18.5
ns
10
ns
Note: 1.
∆t
PD
= t
PLH
– t
PHL
Receiver (V
CC
= 5.0 V, Ta = 25°C)
Item
Rise Propagation
Delay Time
Fall Propagation
Delay Time
Propagation Delay
Time Difference
*1
Symbol
t
PLH
Conditions
R
L
= 2 kΩ, C
L
= 15pF
Min
7.5
Max
19.5
Unit
ns
t
PHL
∆t
PD
7.5
19.5
ns
10
ns
Note: 1.
∆t
PD
= t
PLH
– t
PHL
4
HD29468
Driver
Test Circuit
Input
V
CC
= +5.0 V
HD29468
Output
Pulse Generator
Z
OUT
= 50
Ω
50
Ω
R
L
= 4.75
Ω
Waveforms
t
r
t
f
90 %
1.3 V
Input
10 %
t
PLH
90 %
1.3 V
10 %
t
PHL
3V
0V
V
OH
1.4 V
Output
1.4 V
V
OL
Notes: 1. t
r
= 15 ns, t
f
= 6 ns
2. Input waveforms : PRR = 1 MH
Z
, duty cycle 50 %
5
传感器
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