CS1112 Datasheet, PDF (5/12 Pages) ON Semiconductor – Quad Power Output Driver

CS1112
PACKAGE PIN DESCRIPTION (continued)
PACKAGE PIN #
24 Lead SOIC
15
PIN SYMBOL
OUT2
16
IN2
21
IN3
22
OUT3
23
STATUS
24
R_OSC
FUNCTION
Open drain output three.
Parallel input three.
Parallel input four.
Open drain output four.
Open drain output, which is asserted when an open load or
overcurrent condition occurs at any of the outputs.
82 kΩ resistor tied to ground to set up accurate internal cur-
rent sources.
CIRCUIT DESCRIPTION
Typical Operation
Control of the CS1112 can be done using the Serial
Peripheral Interface (SPI) port using the Data Input
information in Table 1, or the outputs can be controlled via
the parallel inputs (IN0, IN1, IN2, IN3). IN0 controls OUT0,
IN1 controls OUT1, IN2 controls OUT2, and IN3 controls
OUT3. Turning the output drivers on is an OR function with
the SPI input and the parallel inputs.
Note: To prevent damage to the IC or the output load, V_DD
must be above the Power on Reset threshold (3.5 V) before
IN0, IN1, IN2, or IN3 are asserted high (< 70% V_DD).
TIMING DIAGRAM
CS
SCLK
SI
Don’t Care
OUT0
OUT1
OUT2
OUT3
Table 1. SPI Inputs
D7
D6
D5
X
X
X
MSB
X = Don’t Care; MSB is Transferred first.
Time
D4
D3
D2
D1
D0
X
OUT3
OUT2
OUT1
OUT0
LSB
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