MB88141 Datasheet, PDF (4/20 Pages) Fujitsu Component Limited. – D/A Converter for Digital Tuning (With Built-in OP Amp and I/O Expander)

MB88141
s PIN DESCRIPTIONS
Pin no. Symbol
I/O
Description
21
SDA
BUS
I²C bus data input/output pin (hysteresis input). *²
Outputs the acknowledge signal.
20
SCL
I
I²C bus shift clock input pin (hysteresis input). *²
19
MOD
D/A converter and I/O expander mode switching pin. *^1, *³
I
Input “L” to operate as a D/A converter, “H” to operate as I/O expander and
D/A converter.
16
CS0
17
CS1
18
CS2
I
Lower 3 bits of the slave address setting pins. *¹
This allows up to eight MB88141 chips to be used on the same bus line.
1
AO1
2
3
AO2
AO3
O 8-bit D/A output with OP Amp. *³
4
AO4
5
D7/AO5
6
D6/AO6
7
8
9
10
D5/AO7
D4/AO8
D3/AO9
D2/AO10
8-bit D/A output with OP Amp. *³
I/O In I/O expander operation, these pins function as parallel data input/output
pins.
11
D1/AO11
12
D0/AO12
13
VCC
 Power supply pin for digital circuits and OP Amp.
24
GND
 GND pin for digital circuits and OP Amp.
22
VDD1
 Reference power supply pin for D/A converter (H). AO1 to AO4.
23
VSS1
 Reference power supply pin for D/A converter (L). AO1 to AO4.
15
VDD2
 Reference power supply pin for D/A converter (H). AO5 to AO12.
14
VSS2
 Reference power supply pin for D/A converter (L). AO5 to AO12.
*1: The MOD and CS0-CS2 pins should be used with fixed level input.
*2: Use particular caution in handling the SDA and SCL pins. These pins have no transistor protection against VCC
voltage and therefore have weaker anti-static characteristics than other pins.
*3: When using the I/O expander function together with the D/A converter function, take care that D/A converter
output precision is within a range that will not affect overall system operation.
4