HD26LS32A
Quadruple Differential Line Receivers With 3 State Outputs
ADE-205-578 (Z)
1st. Edition
Dec. 2000
Description
The HD26LS32A features quadruple line receivers designed to meet the specs of EIA standard RS-422A
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.
Logic Diagram
1A
Enable G
Enable G
1Y
2Y
3Y
4Y
1B
2A
2B
3A
3B
4A
4B
HD26LS32A
2
Pin Arrangement
(Top view)
1
2
3
4
5
6
7
1B
GND
1A
1Y
2Y
8
Enable G
2A
2B
13
14
15
10
11
12
9
16 VCC
4B
4A
4Y
Enable G
3Y
3A
3B
Function Table
Differential Input Enable Output
A – B G GY
VID ≥ VTH HXH
XLH
V
TL < VID < VTH HX?
XL?
V
ID ≤ VTL HXL
XLL
XLHZ
H : High level
L : Low level
X : Immaterial
? : Irrelevant
Z : High impedance
HD26LS32A
3
Absolute Maximum Ratings
Item Symbol Ratings Unit
Supply Voltage VCC*17.0 V
Input Voltage A or B VIN ±25 V
Differential Input Voltage VID*2±25 V
Enable Input Voltage VIN 7V
Output Sink Current Iout 50 mA
Continuous Total Dissipation PT1W
Operating Temperature Topr 0 to +70 °C
Storage Temperature Tstg –65 to 150 °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. 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 V
Output Current IOH — — –440 µA
IOL ——8 mA
Operating Temperature Topr 0 — 70 °C
HD26LS32A
4
Electrical Characteristics (Ta = 0 to +70°C)
Item Symbol Min Typ*1Max Unit Conditions
Differential Input High
Threshold Voltage VTH — — 0.2 V VIC = –7 to +7 V VOH = 2.7V, IOH = –440 µA
Differential Input Low VTL — — –0.2 VOL = 0.4 V, IOL = 4 mA
Threshold Voltage — — –0.2 VOL = 0.45 V, IOL = 8 mA
Input Hysteresis*2VTH – VTL —50—mV
Enable Input Voltage VIH 2.0 — — V
VIL — — 0.8
Enable Input Clamp
Voltage VIK — — –1.5 VCC = 4.75 V, IIN = –18 mA
Output Voltage VOH 2.7 — — VCC = 4.75 V VID = 1 V, IOH = –440 µA
VOL — — 0.4 VIL (G) = 0.8 V VID = –1 V, IOL = 4 mA
— — 0.45 VID = –1 V, IOL = 8 mA
Off State (High IOZ ——20µAV
CC = 5.25 V VO = 2.4 V
Impedance) Output
Current — — –20 VO = 0.4 V
Line Input Current II —
——
—2.3
–2.8 mA VI = 15 V, Other Inputs –10 to +15 V
VI = –15 V, Other Inputs –15 to +10 V
Enable Input Current II (EN) — — 100 µAV
I
= 5.5 V
IIH — — 20 VI = 2.7 V
IIL — — –0.36 mA VI = 0.4 V
Input Resistance ri 6 9.8 — kΩVIC = –15 to +15 V (Other Inputs AC GND)
Short Circuit Output
Current IOS*3–15 — –85 mA VCC = 5.25 V
Supply Current ICC —5270 V
CC = 5.25 V, VI = 0 V (All Outputs Disable)
Notes: 1. All typical values are at VCC = 5 V, 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.
HD26LS32A
5
Switching Characteristics (VCC = 5 V, Ta = 25°C)
Item Symbol Min Typ Max Unit Conditions
Propagation Delay Time tPLH —2035nsC
L
= 15 pF
tPHL —2235
Output Enable Time tZH —1722nsC
L
= 15 pF
tZL —2025
Output Disable Time tHZ —2130nsC
L
= 5 pF
tLZ —3040
HD26LS32A
6
1. tPLH, tPHL
Test circuit
Pulse
Generator
Input
CL
Output
Ω2 k
VCC
Ω5 k
2 V
Waveforms
Input A 0 V 0 V
0 V 0 V
tPLH
OH
VOL
V
1.3 V
2.5 V
–2.5 V
2.5 V
–2.5 V
tPHL
1.3 V
Input B
Output
HD26LS32A
7
2. tHZ, tZH
Test circuit
Input
2.5 V
2 V
CL
Output Ω2 k
VCC
Ω5 k
S1
Pulse
Generator
Waveforms
Enable G 1.3 V 1.3 V
1.3 V 1.3 V
tZH
OH
V
1.3 V
3 V
0 V
3 V
0 V
tHZ
0.5 V
Output
Enable G
S1 : Open
0 V
1.4 V
S1 : Closed
HD26LS32A
8
3. tLZ, tZL
Test circuit
Input
–2.5 V
2 V
CL
Output Ω2 k
VCC
Ω5 k
S2
Pulse
Generator
Waveforms
Enable 1.3 V 1.3 V
1.3 V 1.3 V
tZL
OH
VOL
V
1.3 V
3 V
0 V
3 V
0 V
tLZ
0.5 V
Output
Enable G
S2 : Open S2 : Closed
1.4 V
Notes: 1. The pulse generator has the following characteristics:
PRR = 1 MHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, Zout = 50Ω.
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.
HD26LS32A
9
Package Dimensions
Hitachi Code
JEDEC
EIAJ
Mass
(reference value)
DP-16
Conforms
Conforms
1.07 g
Unit: mm
6.30
19.20
16 9
81 1.3
20.00 Max
7.40 Max
7.62
0.25
+ 0.13
– 0.05
2.54 ± 0.25 0.48 ± 0.10
0.51 Min
2.54 Min 5.06 Max
0° – 15°
1.11 Max
Hitachi Code
JEDEC
EIAJ
Mass
(reference value)
FP-16DA
—
Conforms
0.24 g
Unit: mm
*Dimension including the plating thickness
Base material dimension
*0.22 ± 0.05
*0.42 ± 0.08
0.12
0.15
M
2.20 Max 5.5
10.06
0.80 Max
16 9
18
10.5 Max
+ 0.20
– 0.30
7.80
0.70 ± 0.20
0° – 8°
0.10 ± 0.10
1.15
1.27
0.40 ± 0.06
0.20 ± 0.04
HD26LS32A
10
Cautions
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party’s rights, including
intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as fail-
safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval from Hitachi.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
Hitachi, Ltd.
Semiconductor & Integrated Circuits.
Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan
Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109
Copyright Hitachi, Ltd., 2000. All rights reserved. Printed in Japan.
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