RE46C109 데이터 시트보기 (PDF) - Microchip Technology

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RE46C109

Voltage Regulator, Voltage Converter and Piezoelectric Horn Driver

Microchip Technology 

RE46C109

Voltage Regulator, Voltage Converter and

Piezoelectric Horn Driver

Product Specification

R&E International

A Subsidiary of Microchip Technology Inc.

PIN DESCRIPTIONS

VDD (Pin 1, Input) - Connect to the positive

terminal of the supply voltage for the voltage

regulator, charge pump voltage converter

and bi-directional Interconnect block.

IO1 (Pin 2, Input/Output) - This bi-directional

pin provides an interface to additional

RE46C109 IO1 pins. This serves as a

communication link between separate

modules.

IODIR (Pin 3, Input) - This input provides

control for the bi-directional pins IO1 and

IO2.

IO2 (Pin 4, Input/Output) - This bi-directional

pin provides an interface to a TTL/CMOS I/O

of a uP or ASIC. Refer to the interconnect

logic truth table.

LBST (Pin 5, Input) - This input provides an

enable or strobe control for the analog low

battery detection function.

PG (Pin 6, Output) - This open drain NMOS

output provides a status indication of when

the VREG output is above or below a

specified voltage level.

HRNEN (Pin 7, Input) - This input provides

activation control for the charge pump boost

regulator and horn driver outputs.

VSS (Pin 8, Input) - This power pin is

connected to the negative terminal of the

supply voltage.

FEEDBACK (Pin9, Input) - Horn driver

input.

HORNS (Pin10, Output) - Horn output driver

which provides VPOS to VSS output voltage

swing for the piezoelectric horn.

HORNB (Pin11, Output) - Horn output driver

which provides VPOS to VSS output voltage

swing for the piezoelectric horn.

LBAT (Pin12, Output) - Analog output

voltage that is proportional to the VDD

supply and functions as a low battery

detection output.

VREG (Pin13, Output) - Voltage regulator

output, requires an external capacitor.

VCAP- (Pin14, I/O) - Negative terminal for

the external charge pump boost (fly)

capacitor.

VCAP+ (Pin 15, I/O) - Positive terminal for

the external charge pump boost (fly)

capacitor.

VPOS (Pin 16, Output) - This output pin

requires an external filter capacitor which

supplies voltage for the horn driver outputs.

© 2009 Microchip Technology Inc.

DS22168A-page 5

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