HT9033 Datasheet, PDF (1/9 Pages) Holtek Semiconductor Inc – CAS Tone Detector

HT9033
CAS Tone Detector
Features
· Operating voltage: 3.5V~5.5V
· Differential input
· Power down control
· Bellcore CAS detection (Type II)
· 3.58MHz clock input
Applications
· Feature phone system
· Caller ID with Call Waiting
· Low standby current
· High sensitivity: -33dBm
· Data valid output
· 16-pin DIP/SOP package
· Computer telephony interface products
· Analog Display Service Interface (ADSI)
General Description
The HT9033 is a CPE Alerting Signal (CAS) tone re-
ceiver integrated with digital filter/detector and analog
front end circuit. The HT9033 using analog filter tech-
niques to achieve very high precision detection for the
present of CAS tone.
It is ideal for receiving physical layer signal like
Bellcore¢s CPE Alerting Signal (Type II caller ID) and
similar evolving services like ETS/BT.
Block Diagram
T IP
R IN G
O PO
VREF
+
B and P ass
F ilte r
D e c is io n
L o g ic C K T
DO
R e fe re n c e
S y s te m
C lo c k
VDD
VSS
Pin Assignment
X2
X1 PW DN
T IP 1
R IN G
2
AVSS 3
VSS 4
PW DN 5
NC 6
NC 7
NC 8
16 O P O
15 ^{V R E F}
14 A V D D
13 _{V D D}
12 D O
11 X 2
10 X 1
9 NC
H T9033
1 6 D IP -A /S O P -A
Rev. 1.00
1
May 22, 2006