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LC709006A Schematic ( PDF Datasheet ) - ON Semiconductor

Teilenummer LC709006A
Beschreibung I/O-Expander for Microcontroller
Hersteller ON Semiconductor
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Gesamt 14 Seiten
LC709006A Datasheet, Funktion
Ordering number : EN8265A
LC709006A
CMOS IC
I/O-Expander for Microcontroller
http://onsemi.com
Overview
The LC709006A is a peripheral IC dedicated for expanding the capability of the microcontroller (MCU) I/O ports.
It interfaces with the microcontroller through synchronous serial communication. Communication with the extended
I/O ports is accomplished through 24-bit parallel I/O. The extended port features include the capabilities to specify the
I/O direction on a bit basis, to specify the output type (CMOS or N-channel open drain), and to specify the I/O
voltage level on a port basis according to the power level of the peripheral equipment. These features make allow the
LC709004A to be used in a wide variety of applications.
Features
4-/5-wire synchronous serial transmission and reception, and 24-bit parallel I/O
Wide operating voltage range (2.0V to 6.0V)
Multifunction I/O ports
- I/O direction specification: Bit units
- CMOS or Nch-OD output type specification: Bit units
- Output voltage adjustment: Port (8 bits) units
Output current: 12mA max. (capable of driving a green LED directly)
Data transmission and reception: Can control reception of input data and transmission of output data in parallel.
Cascaded configuration: Ports can be expanded in units of 24 bits × n (n is the number of LSI chips).
Packaging from: MFP36SDJ (375mil): lead-free type
Semiconductor Components Industries, LLC, 2013
May, 2013
Ver.1.2
N0712HKIM B8-8713 No.8265-1/14






LC709006A Datasheet, Funktion
Package Dimensions
unit : mm (typ)
3263
15.2
36 19
LC709006A
1
(0.8)
0.8
0.3 18
0.25
SANYO : MFP36SDJ(375mil)
Pin Assignment
VSSP0
DOUT
DIN
CLK
CS
VDD
RES
VSS
P27
P26
P25
P24
P23
P22
P21
P20
VSSP2
VDDP2
1 36
2 35
3 34
4 33
5 32
6 31
7 30
8 29
9 28
10 LC709006A 27
11 26
12 25
13 24
14 23
15 22
16 21
17 20
18 19
VDDP0
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
VDDP1
Top view
No.8265-6/14

6 Page









LC709006A pdf, datenblatt
LC709006A
Example of Placing Bypass Capacitors between VDD and VSS Terminals
5.0V
5.0V
VSSP0
VDDP0
VDD
C1
VSS
LC709006
5.0V
VSSP2
VDDP2
5.0V
VDDP1
(a) The case of using single voltage
(VDD= VDDP0= VDDP1= VDDP2)
2.5V
C1
3.3V
VSSP0
VDDP0
VDD
C1
VSS
LC709006
5.0V
C1
VSSP2
VDDP2
5.0V
VDDP1
C1
(b) The case of using variable voltage
Fig. 7
In the case of using single voltage source as showing in the Fig.7 (a), you must connect a bypass capacitor (C1, about
0.1μF) between VDD and VSS. When connecting the capacitor (C1) and VDD-VSS, use a thick wire, and try to make
its length as short as possible: moreover, try to make the impedance of VDD-C1 and VSS-C1 equal.
In addition, when using several voltage sources as showing in the Fig.7 (b), it is suggested to connect the bypass
capacitor to each set of the voltage terminals.
VDD
RRES Note:
The values of CRES and RRES must be determined so
that a reset period of 1μs or longer is set up after the
RES operating voltage goes beyond its lower-limit value and
CRES
the reset can be released after the operating power
voltage is completely reached.
Fig. 8: Reset Circuit
No.8265-12/14

12 Page





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