MX641 Просмотр технического описания (PDF) - CML Microsystems Plc
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MX641 Datasheet PDF : 17 Pages
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Dual SPM Detector
Page 5 of 16
MX641 Preliminary Information
Pin
Name
Type
No.
Description
19
Chip Select
input The Chip Select input for use in data loading when using the MX641 in
the Controlled Sensitivity mode (see Figure 9). The device is selected
when this input is set low (logic '0'). When the MX641 is in the Fixed
Sensitivity mode this input should be connected to either VSS or VDD.
20
Serial Clock input The Serial Clock input for use in data loading when using the MX641 in
the Controlled Sensitivity mode (see Figure 9). Data is loaded to the
MX641 on this clock's rising edge. When the MX641 is in the Fixed
Sensitivity mode this input should be connected to either VSS or VDD.
21
Serial Data
input The Serial Data input for use in data loading when using the MX641 in
the Controlled Sensitivity mode (see Figure 9 and Table 4). When the
device is in the Fixed Sensitivity mode this input should be connected to
either VSS or VDD.
22
System Select input 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 should be tied to VDD or left unconnected. This
pin has an internal pull-up resistor on chip.
23
N/C
No internal connection; leave open circuit.
24
VDD
power Positive supply rail; a single, stable power supply is required. Critical
levels and voltages within the MX641 are dependent upon this supply.
This pin should be decoupled to VSS by a capacitor mounted close to
the pin
Table 1: Signal List
ã2001 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480115.004
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
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