TDK5101 데이터 시트보기 (PDF) - Infineon Technologies

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TDK5101

Wireless Components ASK/FSK Transmitter 315 MHz

Infineon Technologies 

TDK 5101

Functional Description

3.2 Pin Definitions and Functions

Table 3-2

Pin Symbol

No.

1

PDWN

Interface Schematic1)

Function

Disable pin for the complete transmitter cir-

cuit.

VS

40 µA ∗ (ASKDTA+FSKDTA) A logic low (PDWN < 0.7 V) turns off all

transmitter functions.

5 kΩ

1

A logic high (PDWN > 1.5 V) gives access to

all transmitter functions.

150 kΩ

"ON"

PDWN input will be pulled up by 40 µA inter-

nally by setting FSKDTA or ASKDTA to a

logic high-state.

250 kΩ

2

LPD

This pin provides an output indicating the

VS

low-voltage state of the supply voltage VS.

40 µA

VS < 2.15 V will set LPD to the low-state.

300 Ω

An internal pull-up current of 40 µA gives the

2

output a high-state at supply voltages above

2.15 V.

3

VS

This pin is the positive supply of the trans-

mitter electronics.

An RF bypass capacitor should be con-

nected directly to this pin and returned to

GND (pin 5) as short as possible.

Wireless Components

3-3

Specification, October 2002

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