NSC DS1489N, DS1489MX, DS1489M, DS1489AN, DS1489AMX Datasheet

May 1998

DS1489/DS1489A

Quad Line Receiver

General Description

The DS1489/DS1489A are quad line receivers designed to interface data terminal equipment with data communications equipment. They are constructed on a single monolithic silicon chip. These devices satisfy the specifications of EIA Standard RS-232D. The DS1489/DS1489A meet and exceed the specifications of MC1489/MC1489A and are pin-for-pin replacements.

Features

nFour separate receivers per package

nProgrammable threshold

nBuilt-in input threshold hysteresis

nªFail safeº operating mode: high output for open inputs

nInputs withstand ±30V

Schematic and Connection Diagrams

DS005777-1

(1¤4 of unit shown) DS1489: RF = 10k DS1489A: RF = 2k

Dual-In-Line Package

DS005777-2

Top View

Order Number DS1489M, DS1489N

DS1489AM or DS1489AN

See NS Package Number M14A or N14A

Receiver Line Quad DS1489/DS1489A

© 1998 National Semiconductor Corporation

DS005777

www.national.com

AC Test Circuit and Voltage Waveforms

DS005777-3

DS005777-4

FIGURE 1.

www.national.com

2

Absolute Maximum Ratings (Note 2)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.

Power Supply Voltage	10V
Input Voltage Range	±30V
Output Load Current	20 mA
Power Dissipation (Note 3)	1W
Operating Temperature Range	0ÊC to +75ÊC

Storage Temperature Range	−65ÊC to +150ÊC
Maximum Power Dissipation (Note 1) at 25ÊC
Molded DIP Package	1207 mW
SO Package	1042 mW
Lead Temperature (Soldering, 4
sec.)	260ÊC

Note 1: Derate molded DIP package 9.7 mW/ÊC above 25ÊC; derate SO package 8.33 mW/ÊC above 25ÊC.

Electrical Characteristics (Notes 3, 4, 5)

DS1489/DS1489A: The following apply for VCC = 5.0V ±1%, 0ÊC £ TA £ +75ÊC unless otherwise specified.

Symbol	Parameter		Conditions			Min	Typ	Max	Units
VTH	Input High Threshold Voltage	VOUT £ 0.45V,	DS1489		TA = 25ÊC	1.0	1.25	1.5	V
		IOUT = 10 mA				0.9		1.6	V
			DS1489A		TA = 25ÊC	1.75	2.00	2.25	V
						1.55		2.40	V
VTL	Input Low Threshold Voltage	VOUT ³ 2.5V,			TA = 25ÊC	0.75	1.00	1.25	V
		IOUT = −0.5 mA				0.65		1.35	V
IIN	Input Current	VIN = +25V				+3.6	+5.6	+8.3	mA
		VIN = −25V				−3.6	−5.6	−8.3	mA
		VIN = +3V				+0.43	+0.53		mA
		VIN = −3V				−0.43	−0.53		mA
VOH	Output High Voltage	IOUT = −0.5 mA	V IN = 0.75V			2.6	3.8	5.0	V
			Input = Open			2.6	3.8	5.0	V
VOL	Output Low Voltage	VIN = 3.0V, IOUT = 10 mA					0.33	0.45	V
ISC	Output Short Circuit Current	VIN = 0.75V					−3.0		mA
ICC	Supply Current	VIN = 5.0V					14	26	mA
Pd	Power Dissipation	VIN = 5.0V					70	130	mW

Switching Characteristics

VCC = 5V, TA = 25ÊC

Symbol	Parameter	Conditions	Min	Typ	Max	Units
tpd1	Input to Output ªHighº	RL = 3.9k, (Figure 1) (AC Test Circuit)		28	85	ns
	Propagation Delay
tpd0	Input to Output ªLowº	RL = 390W, (Figure 1) (AC Test Circuit)		20	50	ns
	Propagation Delay
tr	Output Rise Time	RL = 3.9k, (Figure 1) (AC Test Circuit)		110	175	ns
tf	Output Fall Time	RL = 390W, (Figure 1) (AC Test Circuit)		9	20	ns

Note 2: ªAbsolute Maximum Ratingsº are those values beyond which the safety of the device cannot be guaranteed. Except for ªOperating Temperature Rangeº they are not meant to imply that the devices should be operated at these limits. The table of ªElectrical Characteristicsº provides conditions for actual eviced operation.

Note 3: Unless otherwise specified min/max limits apply across the 0ÊC to +75ÊC temperature range for the DS1489 and DS1489A.

Note 4: All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown as max or min on absolute value basis.

Note 5: These specifications apply for response control pin = open.

3	www.national.com