DS78LS120JSLASH883 datasheet(2/12 Pages) TI1

2 / 12 page

DS78LS120 is OBSOLETE

DS78LS120QML, DS78LS120

SNLS370C – SEPTEMBER 1999 – REVISED APRIL 2013

www.ti.com

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Absolute Maximum Ratings

(1) (2)

Supply Voltage

Input Voltage

±25V

Strobe Voltage

Output Sink Current

50 mA

Storage Temperature Range

−65°C to +150°C

Maximum Power Dissipation at 25°C(3)

1433 mV

Lead Temperature (Soldering, 4 sec)

260°C

(1)

“Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be ensured. Except for “Operating

Temperature Range” they are not meant to imply that the devices should be operated at these limits. The table of “Electrical

Characteristics” provides conditions for actual device operation.

(2)

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

(3)

Derate CDIP package 9.6 mW/°C above 25°C.

Operating Conditions

Min

Max

Units

Supply Voltage (VCC)

4.5

5.5

Temperature (TA)

−55

+125

°C

Common-Mode Voltage (VCM)

−15

+15

Electrical Characteristics

(1) (2)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VTH

−7V ≤ VCM ≤ 7V

0.06

0.2

Differential Threshold Voltage

IOUT = −400 μA, VOUT ≥ 2.5V

−15 ≤ VCM ≤15V

0.06

0.3

VTL

−7V ≤ VCM ≤7V

−0.08

−0.2

Differential Threshold Voltage

IOUT = 4 mA, VOUT ≤ 0.5V

−15V ≤ VCM ≤ 15V

−0.08

−0.3

VTH

Differential Threshold Voltage

IOUT = −400 μA, VOUT ≥ 2.5V

−7V ≤ VCM ≤ 7V

0.47

0.7

VTL

with Fail-Safe Offset = 5V

IOUT = 4 mA, VOUT ≤ 0.5V

−7V ≤ VCM ≤ 7V

−0.2

−0.42

RIN

Input Resistance

−15V ≤ VCM ≤ 15V, 0V ≤ VCC ≤ 7V

Line Termination Resistance

TA = 25°C

100

180

300

Offset Control Resistance

TA = 25°C

IIND

VCM = 10V

3.1

Data Input Current (Unterminated)

VCM = 0V

≤ VCC ≤ 7V

−0.5

VCM = −10V

−2

−3.1

VTHB

IOUT = −400 μA, VOUT ≥ 2.5V,

−7V ≤ VCM 7V

0.1

0.4

RS = 500Ω

Input Balance(3)

IOUT = 4 mA, VOUT ≤ 0.5V,

−7V ≤ VCM ≤ 7V

−0.1

−0.4

RS = 500Ω

VOH

Logical “1” Output Voltage

IOUT = −400 μA, VDIFF = 1V, VCC = 4.5V

2.5

VOL

Logical “0” Output Voltage

IOUT = 4 mA, VDIFF = −1V, VCC = 4.5V

0.35

0.5

ICC

VCC = 5.5V

VCM = 15V

Power Supply Current

VDIFF = −0.5V, (Both Receivers)

VCM = −15V

(1)

Unless otherwise specified min/max limits apply across the

−55°C to +125°C temperature range for the DS78LS120QML. All typical

values are for TA = 25°C, VCC = 5V and VCM = 0V.

(2)

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.

(3)

Refer to EIA-RS422 for exact conditions.

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