L5951

8/13

0.7

V

BUS & LOADCurrent during loss

BUS = -18 to 9VDC

LOAD = -18 to 0 VDC

11

39

µA

µA

TX Input Voltage

Verify BUS < 3.875VDC

Verify BUS > 3.875VDC

2

0.8

V

V

TX Input Current

TX = 5VDC

TX = 0VDC

110

0

µA

µA

4X Input Trip Point Voltages

Normal Mode

4X Mode

1.4

V

4X Input Current

4X = 5 VDC

4X = 0 VDC

0

0

µA

µA

LOOP Input Trip Point Voltages

Normal Mode

Loopback Mode

2

0.8

V

V

LOOP Input Current

LOOP = 5VDC

LOOP = 0VDC

0

µA

RX Output Voltage, High

V

RX Output Voltage, Low

0.2

V

RX Output Current

RX = high (Short circuit protection

limits)

5mA

Sleep* Input Voltage

TX = 5VDC

Verify BUS > 3.725

Verify BUS < 4.025

2

0.8

V

V

Sleep* Input Current

Sleep* = 5VDC

Sleep* = 0VDC

0.2

0

µA

µA

* Denotes active low for Sleep and Reset.

AC Characteristics for Class 2 Transceiver

Standard Loads: IREG1 = 0.5mA, IREG2 = 0.5mA, IREG3 = 5mA

TX = 7.812Hz square wave

See Figure 1

Min and Max Loaded BUS

15

µs

TX = 7.812Hz square wave

See Figure 1

Min and Max Loaded BUS

14

µs

BUS Pulse Width Distortion

TX = 7.812Hz square wave

See Figure 2

Load BUS with 3.300pF and

1.38k

Ω

Meas. @ 1.5V levels

Meas. @ 6.25V levels

77

48

µs

µs

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit