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Part: 5962R7802005Q2A
Category:
Interface and Interconnect
-> RS-422/RS-423
Description: DS26F32M - Quad Differential Line Receivers, Package: Lcc, Pin Nb=20
Company: National Semiconductor Corporation
Datasheet: Download 5962R7802005Q2A datasheet File size : 132 kB
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Datasheet text preview:
DS26F32MQuad Differential Line Receivers
May 1999
DS26F32M Quad Differential Line Receivers
General Description
The DS26F32 is a quad differential line receiver designed to meet the requirements of EIA Standards RS-422 and RS-423, and Federal Standards 1020 and 1030 for balanced and unbalanced digital data transmission. The DS26F32 offers improved performance due to the use of state-of-the-art L-FAST bipolar technology. The L-FAST technology allows for higher speeds and lower currents by utilizing extremely short gate delay times. Thus, the DS26F32 features lower power, extended temperature range, and improved specifications. The device features an input sensitivity of 200 mV over the input common mode range of ± 7.0V. The DS26F32 provides an enable function common to all four receivers and TRI-STATE ® outputs with 8.0 mA sink capability. Also, a fail-safe input/output relationship keeps the outputs high when the inputs are open. The DS26F32 offers optimum performance when used with the DS26F31 Quad Differential Line Driver.
Features
n Military temperature range n Input voltage range of ± 7.0V (differential or common mode) ± 0.2V sensitivity over the input voltage range n Meets all the requirements of EIA standards RS-422 and RS-423 n High input impedance (18k typical) n 30 mV input hysteresis n Operation from single +5.0V supply n Input pull-down resistor prevents output oscillation on unused channels n TRI-STATE outputs, with choice of complementary enables, for receiving directly onto a data bus n Propagation delay 15 ns typical
Connection Diagrams
16-Lead DIP
20-Lead Ceramic Leadless Chip Carrier
DS009615-7
Function Table
(Each Receiver) Differential Inputs VID = (V IN+) - (VIN-) VID 0.2V
DS009615-1
Enables E H X H X L E X L X L H
Outputs OUT H H L L Z
Top View See NS Package Number J16A For Complete Military Product Specifications, refer to the appropriate SMD or MDS. Order Number DS26F32ME/883, DS26F32MJ/883 or DS26F32MW/883 See NS Package Number E20A, J16A or W16A
VID -0.2V X
H = High Level L = Low Level X = Immaterial
TRI-STATE ® is a registered trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation
DS009615
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Absolute Maximum Ratings (Note 2)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Ceramic DIP -65°C + to 175°C Operating Temperature Range DS26F32M -55°C to +125°C DS26F32C 0°C to +70°C Lead Temperature Ceramic DIP (soldering, 60 sec) 300°C Maximum Power Dissipation (Note 1) at 25°C
Cavity Package Supply Voltage Common Mode Voltage Range Differential Input Voltage Enable Voltage Output Sink Current
1500 mW 7.0V ± 25V ± 25V 7.0V 50 mA
Operating Range
DS26F32M Temperature Supply Voltage -55°C to +125°C 4.5V to 5.5V
Note 1: Derate cavity package 10 mW/°C above 25°C.
Electrical Characteristics (Notes 3, 4)
Over operating range, unless otherwise specified Symbol VTH RI II Parameter Differential Input Voltage Input Resistance Input Current (under Test) Conditions -7.0V VCM +7.0V, V O = VOL or VOH -15V VCM +15V, One Input AC Ground V I = +15V, Other Input -15V VI +15V V I = -15V, VOH Output Voltage HIGH Other Input -15V VI +15V VCC = Min, 0°C to +70°C VI = +1.0V, VENABLE = 0.8V, IOH = -440 µA VOL Output Voltage LOW VCC = Min, VI = -1.0V, VENABLE = 0.8V -55°C to +125°C IOL = 4.0 mA IOL = 8.0 mA 2.8 2.5 3.4 V 3.4 0.4 0.45 0.8 2.0
CC = Min, II = -18 mA VCC = Max VO = 2.4V VO = 0.4V VI = 0.4V
Min -0.2 14
Typ
Max +0.2
Units V k
± 0.06
18
2.3 mA -2.8
V V V V µA mA µA µA mA mA mV
VIL VIH VIC IOZ IIL IIH II IOS ICC VHYST
Enable Voltage LOW Enable Voltage HIGH Enable Clamp Voltage Off State (High Impedance) Output Current Enable Current LOW Enable Current HIGH Enable Input High Current Output Short Circuit Current Supply Current Input Hysteresis V
-1.5 20 -20 -0.2 0.5 1.0 -15 -50 30 30 -0.36 10 50 -85 50
VI = 2.7V VI = 5.5V V O = 0V, VCC = Max, (Note 5) V I = +1.0V V
CC
= Max, All VI = GND,
Outputs Disabled T A = 25°C, VCC = 5.0V, VCM = 0V
Note 2: "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices should be operated at these limits. The tables of "Electrical Characteristics" provide conditions for actual device operation. Note 3: Unless otherwise specified min/max limits apply across the -55°C to +125°C temperature range for the DS26F32M and across the 0°C to +70°C range for the DS26F32C. All typicals are given for V CC = 5V and TA = 25°C. Note 4: All currents into the device pins are positive; all currents out of the device pins are negative. All voltages are reference to ground unless otherwise specified. Note 5: Only one output at a time should be shorted.
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Switching Characteristics
VCC = 5.0V, TA = 25°C Symbol tPLH tPHL tLZ tHZ tZL tZH Parameter Input to Output Input to Output Enable to Output Enable to Output Enable to Output Enable to Output (Figures 2, 4) CL = 15 pF CL = 5 pF (Figures 2, 3) Conditions CL = 15 pF Min Typ 15 15 14 15 13 12 Max 22 22 18 20 18 16 Units ns ns ns ns ns ns
DS009615-2
FIGURE 1. Logic Symbol
DS009615-3
FIGURE 2. Load Test Circuit for Three-State Outputs
DS009615-4
FIGURE 3. Propagation Delay (Notes 6, 7, 8)
3
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Switching Characteristics
(Continued)
DS009615-5
Note 6: Diagram shown for ENABLE Low. Note 7: S1 and S2 of Load Circuit are closed except where shown. Note 8: Pulse Generator of all Pulses: Rate 1.0 MHz, ZO = 50, tr 6.0 ns, tf 6.0 ns. Note 9: All diodes are IN916 or IN3064. Note 10: C L includes probe and jig capacitance.
FIGURE 4. Enable and Disable Times (Notes 6, 7, 8)
Typical Application
DS009615-6
FIGURE 5.
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4
Physical Dimensions
inches (millimeters) unless otherwise noted
Order Number DS26F32ME/883 NS Package Number E20A
Ceramic Dual-In-Line Package (J) Order Number DS26F32MJ/883 NS Package Number J16A
5
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