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LDS8161/41
PIN DESCRIPTION
I C Serial clock input
I C Serial data input/output
I C Serial interface Address Programming
Function
2
2
2
Ground Reference
Device enable (active high)
LEDC2 anode terminal -8161 (NC for 8141)
LEDC1 anode terminal -8161 (NC for 8141)
Pin
Name
SCLK
SDAT
SADD
GND
EN
LEDC2
LEDC1
Pin #
8161
1
2
3
4
6
8
9
8141
1
2
3
4
6
LEDB2 anode terminal
LEDB1 anode terminal
LEDA2 anode terminal
LEDA1 anode terminal
Power Source Input; connect to battery or supply
Test pin
Not connect (no internal connect to the device)
Connect to GND on the PCB
LEDB2
LEDB1
LEDA2
LEDA1
V IN
TST
NC
PAD
10
11
12
13
14
15
5, 7, 16
PAD
10
11
12
13
14
15
5, 7, 8,
9, 16
PAD
PIN FUNCTION
V IN is the supply pin. A small 1 μ F ceramic bypass
capacitor is required between the V IN pin and ground
near the device. The operating input voltage range is
from 2.5 V to 5.5 V.
EN is the enable input for the entire device.
GND is the ground reference for internal circuitry.
The pin must be connected to the ground plane on
the PCB.
LEDA1 – LEDC2 provide the internal regulated
current source for each of the LED anodes. These
Guaranteed levels of logic high and logic low are set
pins enter high-impedance
zero current state
communicate through I C interface
SDAT is the I C serial data line. This is a bidirectional
SCLK is the I C serial clock input.
SADD is I C Serial interface Addresses tie to either
at 1.3 V and 0.4V respectively. When EN is initially
taken high, the device becomes enabled and may
2
2
line allowing data to be written into and read from the
four registers in the driver..
2
2
GND or VIN pin to allow choice of two salve
addresses
whenever the device is in shutdown mode. LEDC1
and LEDC2 are no connects (NC) for the LDS8141.
PAD is the exposed pad underneath the package.
For best thermal performance, the tab should be
soldered to the PCB and connected to the ground
plane
TST is a test pin used by factory only. Leave it
floating (no external connection)
? 2009 IXYS Corp.
Characteristics subject to change without notice
10
Doc. No. 8141/61_DS, Rev. N1.0
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