CMX641A Ver la hoja de datos (PDF) - MX-COM Inc
Número de pieza
componentes Descripción
Lista de partido
CMX641A Datasheet PDF : 23 Pages
| |||
Dual SPM/Security Detector/Generator
6 of 23
CMX641A Advance Information
22
22
23
23
24
24
SYSTEM SELECT
TX TONE SELECT
TONE OP
VDD
I/P
I/P
O/P
POWER
This is a dual function pin differing between
Fixed Bandwidth Operating state and Enhanced
Features Operating state.
This pin has an internal pullup on chip so that the
default modes are Detect 12kHz (Fixed
Bandwidth Operating state, Fixed Sensitivity
mode) or TX Tone = 12kHz (Enhanced Features
Operating state).
(Fixed Bandwidth Operating state).
In the Fixed Sensitivity mode, this pin selects the
system frequency. High (logic ‘1’)=12kHz; Low
(logic ‘0’)=16kHz.
In the Controlled Sensitivity mode, this pin may
be tied to VDD or may be left unconnected.
Future functions of this pin, if tied low, are
reserved.
(Enhanced Features Operating state).
This pin selects 12kHz or 16kHz as the transmit
frequency at the TONE OP pin. When high
(logic ‘1’), the Tx tone at the TONE OP pin is
12kHz. When low (logic ‘0’), the Tx tone is
16kHz.
Operates in Enhanced Features Operating state
only. A 12kHz or 16kHz transmit tone appears at
this pin under the control of the TONE ASK and
the TX TONE SELECT pin.
In Fixed Bandwidth Operating state, this pin is
unused and should be left unconnected.
The positive supply rail. Critical levels and
voltages within the CMX641A are dependent
upon this supply. This pin should be decoupled
to VSS by a capacitor mounted close to the
device pins.
Table 1: Signal List
Notes:
1. SYSTEM SELECT/TX TONE SELECT, ENHANCED FEATURES, and PRESET LEVEL/TONE ASK pins
should never be simultaneously driven low - to VSS
2. I/P = Input
3. O/P = Output
4. BI = Bi-directional
ã2001 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480227.002
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
Share Link: 