Micrel

MICRF010

June 2005

2

M9999-063005

(408) 955-1690

Pin Configuration

Standard 8-Pin SOIC (M)

Pin Description

Pin Number

Pin Name

Pin Function

1

VSS

Ground Return (input): ground return to the power supply. See “Applications Information” for bypass

capacitor details.

2

ANT

Antenna (Input): See “Applications Information” for information on input impedance. For optimal

performance the antenna impedance should be matched to the antenna pin impedance.

3

VDD

Power Supply (Input): Positive Supply input for the RF IC. Connect a low ESL, low ESR decoupling

capacitor from this to VSS, with lead length kept 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 “Applications Information” for selection.

5

DO

Digital Output (Output): CMOS level compatible data output signal.

6

SHUT

Shutdown (Input): Shutdown-mode logic-level control input. Pull low to enable the receiver. This input

is pulled-up internally to VDD.

7

CAGC

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

See “Applications Information” for capacitor selection.

8

REFOSC

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

alignment.