L9705 STMicroelectronics, L9705 Datasheet - Page 4

• Manufacturer Part Number: L9705
• Description: IC INTERFACE DOUBLE QUAD 20-DIP
• Manufacturer: STMicroelectronics

Specifications of L9705

• Applications: Monitoring, Digital Current
• Voltage - Supply: 5 V ~ 25 V
• Package / Case: 20-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

L9705
Figure 1. Typical application diagram for the L9705 circuit. The current flowing in the arrow
FUNCTIONAL DESCRIPTION
The L9705 circuit monitors the status of the contacts which are connected through the series external re-
sistors R
fig.2 for GND connected contacts (IN 1 to 4) and as shown in fig. 3 for V
Figure 2. The contact sense input connection with the contact equivalent circuit for GND
Figure 3. The contact sense input connection with the contact equivalent circuit for V
4/8
IN
connected contacts.
connected contacts.
direction is assumed positive. The external capacitors CIN and COUT represent the total
wiring capacitance at the corresponding pins.
to the contact sense input pins. The contacts equivalent circuit is supposed to be as shown in
BAT
connected contacts (IN 5 to 8).
BAT