MICRF104 データシートの表示（PDF） - Micrel

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MICRF104

1.8V, QwikRadio™ UHF ASK Transmitter

Micrel 

MICRF104

Pin Configuration

VDDPWR 1

VSS 2

5V 3

VSS 4

REFOSC 5

RFSTBY 6

ANTM 7

14 EN

13 VSS

12 SW

11 PC

10 VDDRF

9 ASK

8 ANTP

MICRF104BM

Micrel

Pin Description

Pin Number

1

2, 4, 13

3

5

6

7

8

9

10

11

12

14

Pin Name

VDDPWR

VSS

5V

REFOSC

RFSTBY

ANTM

ANTP

ASK

VDDRF

PC

SW

EN

Pin Function

Positive power supply input for the DC/DC converter.

Ground return

5V Output from the DC / DC converter

This is the timing reference frequency which is the transmit frequency

divided by 32. Connect a crystal (mode dependent) between this pin and

VSS, or drive the input with an AC coupled 0.5Vpp input clock. See Refer-

ence Oscillator Section in this data sheet

Input for transmitter standby control pin is pulled to VDDRF for transmit

operation and VSS for stand-by mode.

Negative RF power output to drive the low side of the transmit loop antenna

Positive RF power output to drive the high side of the transmit loop antenna

Amplitude Shift Key modulation data input pin.

Positive power supply input for the RF circuit. A power supply bypass

capacitor connected from VDDRF to VSS should have the shortest possible

path.

Power Control Input. The voltage at this pin should be set between 0.3V to

0.4V for normal operation.

DC/DC converter Switch. NPN output switch transistor collector.

Chip Enable input. Active high

MICRF104

2

November 8, 2001

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