NSC DS26F32MDS, DS26F32MD8, DS26F32MWF-QML, DS26F32MW8, DS26F32MJF-QML Datasheet

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

nMilitary temperature range

nInput voltage range of ±7.0V (differential or common mode) ±0.2V sensitivity over the input voltage range

nMeets all the requirements of EIA standards RS-422 and RS-423

nHigh input impedance (18k typical)

n30 mV input hysteresis

nOperation from single +5.0V supply

nInput pull-down resistor prevents output oscillation on unused channels

nTRI-STATE outputs, with choice of complementary enables, for receiving directly onto a data bus

nPropagation delay 15 ns typical

Connection Diagrams

20-Lead Ceramic Leadless Chip Carrier

16-Lead DIP

DS009615-1

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

DS009615-7

Function Table

(Each Receiver)

Differential Inputs	Enables				Outputs
VID = (V IN+) − (V IN−)	E
		E			OUT
VID ³ 0.2V	H		X		H
	X		L		H
VID £ −0.2V	H	X			L
	X		L		L
X	L	H			Z

H = High Level

L = Low Level

X = Immaterial

TRI-STATE® is a registered trademark of National Semiconductor Corporation.

Receivers Line Differential DS26F32MQuad

© 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	−65ÊC + to 175ÊC
Operating Temperature Range
DS26F32M	−55ÊC to +125ÊC
DS26F32C	0ÊC to +70ÊC
Lead Temperature
Ceramic DIP (soldering, 60
sec)	300ÊC

Maximum Power Dissipation (Note 1) at 25ÊC

Electrical Characteristics (Notes 3, 4)

Over operating range, unless otherwise specified

Cavity Package	1500 mW
Supply Voltage	7.0V
Common Mode Voltage Range	±25V
Differential Input Voltage	±25V
Enable Voltage	7.0V
Output Sink Current	50 mA

Operating Range

DS26F32M
Temperature	−55ÊC to +125ÊC
Supply Voltage	4.5V to 5.5V

Note 1: Derate cavity package 10 mW/ÊC above 25ÊC.

Symbol	Parameter				Conditions			Min	Typ	Max	Units
VTH	Differential Input Voltage	−7.0V ≤ VCM ≤ +7.0V,						−0.2	±0.06	+0.2	V
		V O = VOL or VOH
RI	Input Resistance	−15V ≤ VCM ≤ +15V,						14	18		kΩ
		One Input AC Ground
II	Input Current (under Test)	V I		= +15V,						2.3
		Other Input −15V ≤ VI ≤ +15V									mA
		V I		= −15V,						−2.8
		Other Input −15V				≤ VI ≤ +15V
VOH	Output Voltage HIGH	VCC = Min,					0ÊC to +70ÊC	2.8	3.4
		VI = +1.0V,									V
		V			= 0.8V,		−55ÊC to +125ÊC	2.5	3.4
			ENABLE
		IOH = −440 µA
VOL	Output Voltage LOW			VCC = Min,			IOL = 4.0 mA			0.4
				VI = −1.0V,			I OL = 8.0 mA			0.45	V
		V			= 0.8V
			ENABLE
VIL	Enable Voltage LOW									0.8	V
VIH	Enable Voltage HIGH							2.0			V
VIC	Enable Clamp Voltage	V CC = Min, II = −18 mA								−1.5	V
IOZ	Off State (High Impedance)	VCC = Max					VO = 2.4V			20	µA
	Output Current						VO = 0.4V			−20
IIL	Enable Current LOW	VI		= 0.4V					−0.2	−0.36	mA
IIH	Enable Current HIGH	VI		= 2.7V					0.5	10	µA
II	Enable Input High Current	VI		= 5.5V					1.0	50	µA
IOS	Output Short Circuit Current	V O = 0V, VCC = Max, (Note 5)						−15	−50	−85	mA
		V I = +1.0V
ICC	Supply Current	V CC = Max, All VI = GND,							30	50	mA
		Outputs Disabled
VHYST	Input Hysteresis	T A = 25ÊC, VCC = 5.0V, VCM = 0V							30		mV

Note 2: ªAbsolute Maximum Ratingsº 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 ªElectrical Characteristicsº provide conditions for actual device operation.

Note 3: Unless otherwise specified min/max limits apply across the −55ÊC to +125ÊC temperature range for the DS26F32M and across the 0ÊC to +70ÊC range for the DS26F32C. All typicals are given for V CC = 5V and TA = 25ÊC.

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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