Pin No.

Symbol

Pin function

Equivalent circuit

No. 5625-6/11

LB1872

Pin Functions

1

2

3

4

5

6

IN3

–

IN3

+

IN1

–

IN1

+

IN2

–

IN2

+

Hall amplifier inputs

IN

Connect a capacitor between the IN

the Hall sensor signals.

An amplitude of over 50 mV p-p and under 350 mV p-p is desirable in

the Hall sensor signals. Kickback may occur in the output if the input

signal has an amplitude greater than 350 mV p-p.

7

8

9

OUT3

OUT2

OUT1

Motor drive outputs

Connect capacitors between the motor outputs (or between the motor

outputs and ground) if oscillation occurs in the outputs. (Use capacitors

in the range 0.1 µF to 0.47 µF.)

10

RF

Output current detection

Connect a resistor (Rf) between this pin and ground.

11

Power supply

12

Stabilized power supply output (5-V output)

Connect a capacitor (about 0.1 µF) between this pin and ground for

stabilization.

13

14

XO

XI

Crystal oscillator connections

These pins are used to drive the reference clock oscillator element.

If an external clock (with a frequency of a few MHz) is used, connect a

resistor (about 13 k

Ω) to the XI pin in series and input the clock signal

through that resistor. Leave the XO pin open in this case.

Continued on next page.