HITACHI HD26LS32A

HD26LS32A
Quadruple Differential Line Receivers With 3 State Outputs
The HD26LS32A features quadruple line receivers
designed to meet the specs of EIA standard RS422A and RS-423. This device operates from a
single 5 V power supply. The enable function is
common to all four receivers and offers a choice
of active high or active low input. Fail safe design
ensures that if the inputs are open, the outputs will
always be high.
Pin Arrangement
1B
1
16 VCC
1A
2
15 4B
1Y
3
14 4A
Enable 4
G
13 4Y
2Y
5
12 Enable
G
2A
6
11 3Y
2B
7
10 3A
GND
8
Logic Diagram
1A
1B
9
3B
1Y
(Top View)
2A
2B
3A
3B
4A
4B
2Y
Function Table
3Y
Enable
Differential Input
A – B
G
G
Output
Y
VID ≥ VTH
H
X
H
X
L
H
H
X
?
X
L
?
H
X
L
X
L
L
L
H
Z
4Y
VTL < VID < VTH
Enable G
Enable G
VID ≤ VTL
X
H
L
X
?
Z
:
:
:
:
:
High level
Low level
Immaterial
Irrelevant
High impedance
HD26LS32A
HD26LS32A
Absolute Maximum Ratings
Item
Symbol
Supply Voltage
VCC
*1
Ratings
Unit
7.0
V
±25
V
Input Voltage A or B
VIN
Differential Input Voltage
VID
Enable Input Voltage
VIN
±25
7
V
Output Sink Current
Iout
50
mA
Continuous Total Dissipation
PT
1
W
Operating Temperature
Topr
0 to +70
°C
Storage Temperature
Tstg
– 65 to 150
°C
*2
V
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. 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
Symbol
Min
Typ
Max
Unit
Supply Voltage
VCC
4.75
5.00
5.25
V
In Phase Input Voltage
VIC
±7.0
Output Current
IOH
– 440
V
µA
8
mA
70
°C
IOL
Operating Temperature
2
Topr
0
HD26LS32A
HD26LS32A
Electrical Characteristics (Ta = 0 to +70°C)
Symbol
Item
Differential Input High
Threshold Voltage
VTH
Differential Input Low
Threshold Voltage
VTL
Input Hysteresis
*2
Enable Input Voltage
VIC =
–7 to +7 V
Unit
VOH = 2.7V, IOH = –440µA
0.2
V
VOL = 0.4 V, IOL = 4 mA
–0.2
VOL = 0.45 V, IOL = 8 mA
–0.2
VTH–VTL
Typ
*1
Max
Min
Conditions
mV
50
VIH
V
2.0
0.8
VIL
Enable Input
Clamp Voltage
VIK
VCC = 4.75 V, IIN = –18 mA
–1.5
Output Voltage
VOH
VCC = 4.75V, VID = 1V, IOH = –440µA 2.7
VIL (G)
VID = –1 V, IOL = 4 mA
= 0.8V
VID = –1 V, IOL = 8 mA
0.4
VOL
0.45
VO = 2.4 V
20
VO = 0.4 V
–20
µA
Off State(High Impedance) IOZ
Output Current
VCC = 5.25V
Line Input Current
VI = 15 V, Other Inputs–10 to +15 V
2.3
VI = –15 V, Other Inputs–15 to +10 V
–2.8
II (EN)
VI = 5.5 V
100
IIH
VI = 2.7 V
20
IIL
VI = 0.4 V
–0.36 mA
Enable Input Current
Input Resistance
II
ri
Short Circuit
Output Current
IOS
Supply Current
ICC
VIC = –15 to +15 V(Other Inputs AC GND) 6
*3
VCC = 5.25 V
VCC = 5.25V, VI = 0V(All
9.8
–15
Outputs Disable)
µA
KΩ
–85
52
mA
mA
70
Notes: 1. All typical values are at VCC=5V, Ta=25°C,VIC=0.
2. Hysteresis is the differential between the positive going input threshold voltage and the
negative going input threshold voltage.
3. Not more than one output should be shorted at a time.
3
HD26LS32A
HD26LS32A
Switching Characteristics (VCC = 5 V, Ta = 25°C)
Item
Symbol
Propagation Delay Time
tPLH
Min
Conditions
CL = 15 pF
tPHL
tZH
Output Enable Time
CL = 15 pF
tZL
tHZ
Output Disable Time
CL = 5 pF
tLZ
Typ
Max
Unit
20
35
ns
22
35
17
22
20
25
21
30
30
40
ns
ns
1. tPLH, tPHL
Waveforms
Test circuit
VCC
2.5 V
Output
Input
Input A
0V
0V
–2.5 V
2 KΩ
Pulse
Generator
2.5 V
CL
Input B
0V
–2.5 V
5 KΩ
tPLH
2V
0V
tPHL
V OH
Output
1.3 V
1.3 V
V OL
4
HD26LS32A
HD26LS32A
2. tHZ, tZH
Test circuit
Waveforms
VCC
Output 2 KΩ
3V
S1
Enable G
2.5 V
1.3 V
1.3 V
0V
CL
Input
5 KΩ
3V
Enable G
1.3 V
1.3 V
0V
Pulse
Generator
0.5 V
2V
≈1.4 V
1.3 V
Output
0V
tZH
tHZ
S1:Open
S1:Closed
3. tLZ, tZL
Test circuit
Waveforms
VCC
Output 2 KΩ
3V
Enable G
–2.5 V
1.3 V
0V
CL
Input
1.3 V
5 KΩ
3V
Enable G
1.3 V
1.3 V
0V
Pulse
Generator
S2
2V
1.4 V
Output
1.3 V
VOL
0.5 V
tZL
tLZ
S2:Open
S2:Closed
Notes: 1. The pulse generator has the following characteristics :
PRR=1 MHZ, 50 % duty cycle, tr ≤ 6ns, tf ≤ 6ns, Zout=50 Ω.
2. CL includes probe and jig capacitance.
3. All diodes are 1S2074 H
4. To test G input,ground G input and apply an inverted
input waveform.
5