May 1999
DS26LS32AC/DS26LS32C/DS26LS32M/DS26LS33M
Quad Differential Line Receivers
General Description
The DS26LS32 and DS26LS32A are quad differential line receivers designed to meet the RS-422, RS-423 and Federal Standards 1020 and 1030 for balanced and unbalanced digital data transmission.
The DS26LS32 and DS26LS32A have an input sensitivity of 200 mV over the input voltage range of ±7V and the DS26LS33 have an input sensitivity of 500 mV over the input voltage range of ±15V.
The DS26LS32A differ in function from the popular DS26LS32 and DS26LS33 in that input pull-up and pull-down resistors are included which prevent output oscillation on unused channels.
Each version provides an enable and disable function common to all four receivers and features TRI-STATE ® outputs with 8 mA sink capability. Constructed using low power Schottky processing, these devices are available over the full military and commerical operating temperature ranges.
Features
nHigh differential or common-mode input voltage ranges of ±7V on the DS26LS32 and DS26LS32A and ±15V on the DS26LS33
n±0.2V sensitivity over the input voltage range on the DS26LS32 and DS26LS32A, ±0.5V sensitivity on the DS26LS33
nDS26LS32 and DS26LS32A meet all requirements of RS-422 and RS-423
n6k minimum input impedance
n100 mV input hysteresis on the DS26LS32 and DS26LS32A, 200 mV on the DS26LS33
nOperation from a single 5V supply
nTRI-STATE outputs, with choice of complementary output enables for receiving directly onto a data bus
Logic Diagram
DS005255-1
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
Receivers Line Differential DS26LS32AC/DS26LS32C/DS26LS32M/DS26LS33MQuad
© 1999 National Semiconductor Corporation |
DS005255 |
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Connection Diagram
Dual-In-Line Package
DS005255-2
Top View
Order Number DS26LS32CM, DS26LS32CN, DS26LS32ACM, DS26LS32ACN, DS26LS33ACM or DS26LS33ACN
See NS Package Number M16A or N16E For Complete Military Product Specifications,
refer to the appropriate SMD or MDS.
Order Number DS26LS32MJ/883, DS26LS32MW/883,
DS26LS32ME/883, DS26LS33MW/883
See NS Package Number E20A, J16A or W16A
20-Lead Ceramic Leadless Chip Carrier
DS005255-12
Truth Table
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ENABLE |
ENABLE |
Input |
Output |
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0 |
1 |
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X |
Hi-Z |
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See |
VID ³ VTH (Max) |
1 |
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Note Below |
VID £ VTH (Min) |
0 |
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Hi-Z = TRI-STATE®
Note: Input conditions may be any combination not defined for ENABLE and ENABLE .
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2 |
Absolute Maximum Ratings (Note 3)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Supply Voltage |
7V |
Common-Mode Range |
±25V |
Differential Input Voltage |
±25V |
Enable Voltage |
7V |
Output Sink Current |
50 mA |
Maximum Power Dissipation (Note 1) at 25ÊC |
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Cavity Package |
1433 mW |
Molded Dip Package |
1362 mW |
SO Package DS26LS32 |
1002 mW |
DS26LS32A |
1051 mW |
Storage Temperature Range |
−65ÊC to |
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+165ÊC |
Lead Temperature (Soldering, 4 seconds) |
260ÊC |
Operating Conditions
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Min |
Max |
Units |
Supply Voltage, (VCC) |
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DS26LS32M, DS26LS33M |
4.5 |
5.5 |
V |
(MIL) |
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DS26LS32C |
4.75 |
5.25 |
V |
DS26LS32AC |
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(COML) |
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Temperature, (TA) |
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DS26LS32M, DS26LS33M |
−55 |
+125 |
ÊC |
(MIL) |
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DS26LS32C |
0 |
+70 |
ÊC |
DS26LS32AC |
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(COML) |
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Note 1: Derate cavity package 9.6 mW/ÊC above 25ÊC; derate molded DIP package 10.9 mW/ÊC above 25ÊC.
Note 2: Derate SO Package 8.01 mW/ÊC for DS26LS32
8.41 mW/ÊC for DS26LS32A
Electrical Characteristics (Notes 4, 5, 6)
over the operating temperature range unless otherwise specified
Symbol |
Parameter |
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Conditions |
Min |
Typ |
Max |
Units |
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VTH |
Differential Input |
VOUT = VOH |
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DS26LS32, DS26LS32A, −7V ≤ VCM ≤ +7V |
−0.2 |
±0.07 |
0.2 |
V |
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Voltage |
or VOL |
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DS26LS33, DS26LS33A, −15V ≤ VCM +15V |
−0.5 |
±0.14 |
0.5 |
V |
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RIN |
Input Resistance |
−15V ≤ VCM ≤ +15V (One Input AC GND) |
6.0 |
8.5 |
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kΩ |
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IIN |
Input Current (Under |
V IN = 15V, Other Input −15V ≤ VIN ≤ +15V |
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2.3 |
mA |
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Test) |
V IN = −15V, Other Input −15V |
≤ VIN ≤ +15V |
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−2.8 |
mA |
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VOH |
Output High Voltage |
VCC = MIN, |
VIN = 1V, |
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Commercial |
2.7 |
4.2 |
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V |
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V |
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= 0.8V, IOH = −440 µA |
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Military |
2.5 |
4.2 |
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V |
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ENABLE |
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VOL |
Output Low Voltage |
VCC = Min, |
VIN = −1V, |
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I OL = 4 mA |
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0.4 |
V |
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V |
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= 0.8V |
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IOL = 8 mA |
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0.45 |
V |
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ENABLE |
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VIL |
Enable Low Voltage |
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0.8 |
V |
VIH |
Enable High Voltage |
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2.0 |
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V |
VI |
Enable Clamp |
VCC = Min, IIN = −18 mA |
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−1.5 |
V |
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Voltage |
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IO |
OFF-State (High |
V CC = Max |
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VO = 2.4V |
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20 |
µA |
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Impedance) Output |
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VO = 0.4V |
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−20 |
µA |
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Current |
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IIL |
Enable Low Current |
VIN = 0.4V |
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−0.36 |
mA |
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IIH |
Enable High Current |
VIN = 2.7V |
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20 |
µA |
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ISC |
Output Short-Circuit |
V O = 0V, VCC = Max, VIN = 1V |
−15 |
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−85 |
mA |
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Current |
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ICC |
Power Supply |
VCC = Max, All VIN = GND, |
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DS26LS32, DS26LS32A |
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52 |
70 |
mA |
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Current |
Outputs Disabled |
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DS26LS33, DS26LS33A |
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57 |
80 |
mA |
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II |
Input High Current |
VIN = 5.5V |
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100 |
µA |
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VHYST |
Input Hysteresis |
TA = 25ÊC, VCC = 5V, |
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DS26LS32, DS26S32A |
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100 |
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mV |
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VCM = 0V |
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DS26LS33, DS26LS33A |
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200 |
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mV |
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Note 3: ªAbsolute Maximum Ratingsº are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device should be operated at these limits. The table of ªElectrical Characteristicsº provides conditions for actual device operation.
Note 4: All currents into device pins are shown as positive, all currents out of device pins are shown as negative, all voltages are referenced to ground, unless otherwise specified. All values shown as max or min are so classified on absolute value basis.
Note 5: All typical values are VCC = 5V, TA = 25ÊC.
Note 6: Only one output at a time should be shorted.
3 |
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