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Micrel, Inc.
Ordering Information
MICRF008
Part Number
MICRF008YM
Junction Temperature Range
–40°C to +85°C
Package
8-Pin SOIC
Lead Finish
Pb-Free
Pin Configuration
SEL0 1
ANT 2
VDD 3
CTH 4
8
7
6
5
REFOSC
CAGC
VSS
DO
8-Pin SOIC (M)
Pin Description
Pin Number
SOIC-8
1
2
3
4
5
6
7
8
Pin Name
SEL0
ANT
VDD
CTH
DO
VSS
CAGC
REFOSC
Pin Name
Bandwidth Selection Bit 0 (Digital Input): Sets the desired demodulator filter bandwidth. See
Table 1. Internally pulled-up to VDD.
Antenna (Input): High-impedance, internally AC-coupled receiver input. Connect this pin to the
matching network. See “Applications Information” for optional band-pass filter information.
Positive Supply Input: Connect a low ESL, low ESR decoupling capacitor from this pin to VSS,
as short as possible.
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.
Data Output (Output): CMOS-level compatible data output signal.
Negative Supply Input: Connect this pin to the RF ground.
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
Information” for capacitor selection.
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.
August 2008
2
M9999-080108
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