Micrel, Inc.

MICRF008

August 2008

2

M9999-080108

Ordering Information

Part Number

Junction Temperature Range

Package

Lead Finish

MICRF008YM

–40°C to +85°C

8-Pin SOIC

Pb-Free

Pin Configuration

1

SEL0

ANT

VDD

CTH

8REFOSC

CAGC

VSS

DO

7

6

5

2

3

4

8-Pin SOIC (M)

Pin Description

Pin Number

SOIC-8

Pin Name

Pin Name

1

SEL0

Bandwidth Selection Bit 0 (Digital Input): Sets the desired demodulator filter bandwidth. See

Table 1. Internally pulled-up to VDD.

2

ANT

Antenna (Input): High-impedance, internally AC-coupled receiver input. Connect this pin to the

matching network. See

3

VDD

Positive Supply Input: Connect a low ESL, low ESR decoupling capacitor from this pin to VSS,

as short as possible.

4

CTH

Data Slicing Threshold Capacitor (External Component): Capacitor extracts the DC average

value from the demodulated waveform which becomes the reference for the internal data slicing

comparator. See

5

DO

Data Output (Output): CMOS-level compatible data output signal.

6

VSS

Negative Supply Input: Connect this pin to the RF ground.

7

CAGC

AGC Capacitor (External Component): Integrating capacitor for on-chip AGC (automatic gain

control). The decay/attack time-constant (τ) ratio is nominally 10:1. See

“Applications

8

REFOSC

Reference Oscillator (External Component or Input): Timing reference for on-chip tuning and

alignment. Connect either a ceramic resonator or a crystal between this pin and VSS, or drive

the input with an AC-coupled 0.5VPP input clock.