HCS473-I/PQTP Ver la hoja de datos (PDF) - Microchip Technology

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HCS473-I/PQTP

KEELOQ® 3-Axis Transcoder

Microchip Technology 

HCS473

FIGURE 2-1:

HCS473 3-AXIS

APPLICATION

VDD

1µF

100nF

HCS473

S0

VDD

S1

LED

S2 DATA

S3/RFEN VSS

VDDT VSST

LCX LCCOM

LCY LCZ

RF

Circuit

LX

CX LY

CY LZ

CZ

680pF

Note:

The 680pF capacitor prevents device instability - self

resonance.

FIGURE 2-2:

HCS473 1-AXIS

APPLICATION

VDD

1µF

100nF

HCS473

S0

VDD

S1

LED

S2 DATA

S3/RFEN VSS

VDDT VSST

LCX LCCOM

LCY LCZ

RF

Circuit

LX

CX

100Ω

100Ω

660 pF

Note:

Connect unused LC antenna inputs to LCCOM

through a 100Ω resistor for proper bias conditions.

FIGURE 2-3:

S0/S1/S2 PIN DIAGRAM

S0, S1, S2

Inputs

RPD

FIGURE 2-4:

S3/RFEN PIN DIAGRAM

VDD

PFET

RFEN

NFET

S3 Input/

RFEN Output

RPD

Note:

RPD is disabled when driving RFEN.

FIGURE 2-5:

DATA PIN DIAGRAM

VDD

PFET

DATA OUT

NFET

DATA

RDATA

Note:

RDATA is disabled when the DATA line is driven.

DS40035C-page 6

Preliminary

 2002 Microchip Technology Inc.

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