The following document contains information on Cypress products.
FUJITSU MICROELECTRONICS
DATA SHEET
DS04-13213-1Ea
Linear IC Converter
CMOS
D/A Converter for Digital Tuning
(Compatible with I
2
C Bus)
MB88141A
■
DESCRIPTION
The FUJITSU MICROELECTRONICS MB88141A is an 8-bit D/A converter with 12 built−in channels.
The 12 analog output channels have built-in OP Amps, providing large current drive capability.
Data input is compatible with I
2
C specifications, and is controlled by two control lines.
The built-in I/O expander function allows the MB88141A to be controlled by devices incompatible with I
2
C bus
specifications (provides conversion between I
2
C serial and 8- or 4-bit parallel I/O).
The MB88141A is ideal for replacing electronic knob or pre-set variable resistance tuning devices.
■
FEATURES
•
•
•
•
•
Ultra-low power consumption (0.9 mW/channel Typ.)
Ultra-compact package
Built-in 12-channel R-2R type 8-bit D/A converter
Built-in analog output amplifier (maximum sink current 1.0 mA, maximum source current 1.0 mA)
Analog output range 0 V to V
CC
(Continued)
24-pin plastic SOP
24-pin plastic SSOP
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PACKAGES
24-pin plastic DIP
(DIP-24P-M02)
(FPT-24P-M01)
(FPT-24P-M03)
“Purchase of Fujitsu Microelectronics I
2
C components conveys a license under the Philips I
2
C Patent Rights
to use these components in an I
2
C system, provided that the system conforms to the I
2
C Standard Specification
as defined by Philips.”
Copyright©2001-2008 FUJITSU MICROELECTRONICS LIMITED All rights reserved
2001.1
MB88141A
(Continued)
• 5 V single power supply
• Power supply/GND for MCU interface and OP Amp is separate from power supply/GND for D/A converter
• Power supply for D/A converter is divided into two systems for V
DDI
/V
SSI
(AO1 to AO4) and V
DD2
/V
SS2
(AO5 to
AO12) , allowing separate level settings for each system
• Compatible with serial data input, I
2
C specifications
• Built-in I/O expander function (converts between I
2
C serial and 8-or 4-bit parallel)
• CMOS process
• Packages : DIP 24-pin, SOP 24-pin, SSOP 24-pin
2
MB88141A
■
PIN ASSIGNMENT
(Top View)
AO1
AO2
AO3
AO4
AO5/D7
AO6/D6
AO7/D5
AO8/D4
AO9/D3
AO10/D2
AO11/D1
AO12/D0
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
GND
VSS1
VDD1
SDA
SCL
MOD
CS2
CS1
CS0
VDD2
VSS2
VCC
(DIP-24P-M02)
(FPT-24P-M01)
(FPT-24P-M03)
3
MB88141A
■
PIN DESCRIPTION
Pin no.
21
20
19
16
17
18
1
2
3
4
5
6
7
8
9
10
11
12
13
24
22
23
15
14
Symbol
SDA
SCL
MOD
CS0
CS1
CS2
AO1
AO2
AO3
AO4
AO5/D7
AO6/D6
AO7/D5
AO8/D4
AO9/D3
AO10/D2
AO11/D1
AO12/D0
VCC
GND
VDD1
VSS1
VDD2
VSS2
Circuit Type
C
B
A
I/O
I/O
I
I
Description
I
2
C bus data input/output pin (hysteresis input).
Outputs the acknowledge signal.
I
2
C bus shift clock input pin (hysteresis input) .
D/A converter and I/O expander mode switching pin. *
1,
*
2
Input “L” to operate as a D/A converter, “H” to operate as I/O
expander and D/A converter.
These pins set the lower 3 bits of the slave address. *
1
This allows up to eight MB88141A chips to be used on the same
bus line.
A
I
D
O
8-bit D/A outputs with OP Amp. *
2
E
I/O
8-bit D/A outputs with OP Amp. *
2
In I/O expander operation, these pins function as parallel data in-
put/output pins.
Power supply
GND
Power supply
Power supply
Power supply
Power supply
⎯
⎯
⎯
⎯
⎯
⎯
Power supply pin for digital circuits and OP Amp.
GND pin for digital circuits and OP Amp.
Reference power supply pin for D/A converter (H) . AO1 to AO4.
Reference power supply pin for D/A converter (L) . AO1 to AO4.
Reference power supply pin for D/A converter (H) . AO5 to AO12.
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: 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.
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