HT9011 Datasheet, PDF (1/7 Pages) Holtek Semiconductor Inc – FM IF Detector

Preliminary
HT9011
FM IF Detector
Features
· Operating voltage: 1.1V~3.5V
· Constant power supply voltage can be gen-
erated by externally adding a transistor:
V_REG=1.0V typ.
· Alarm function sensitivity: V_ALM=1.1V typ.
· Low current consumption: I_CCQ=1.1mA typ.
· Built-in 2nd stage mixer for double conver-
sion method
· Mixer operating frequency: 10MHz~50MHz
· Built-in low-pass filter and waveform shap-
ing circuit enable the extraction of FSK sig-
nals from voice signals
· Built-in battery-saving function for longer
battery life time
· High transmission rate: 1200 bps
· 20-pin SSOP package (0.65mm Pitch)
General Description
The HT9011 is designed for FM communication
system devices. It combines a paging system,
mixer, IF limiter, Quadrature detector, opera-
tion amplifier, comparator and more. The
HT9011 could provide the customer¢s PAGER
system with total solution along with Holtek¢s
POCSAG Pager Controller series products.
Block Diagram
M IX I G N D R E G O R E G C
A LM
FSKO
C H G B S LP FO LP FI
REG .
A LA R M
FSK
CO M P.
Q u ic k
C h a rg e
AM P
M ix e r
IF A m p
O SC
Q uad D et
O S C I O S C O M IX O V C C
IF IN
DEC
F S K R IF O Q U A D A F O
1
March 1, 2000