HT95R45 datasheet(4/76 Pages) HOLTEK

4 / 76 page

Pad Name

I/O

Options

Description

VREF

Reference voltage output, normally VDD/2

CPTENV

While an input signal for CPT detector is within specification, this pin will

output the envelope relative to the input signal with a typical 40ms timing

delay.

CPTVREF

1/2 VDD reference voltage output pin for CPT detector.

When CPTENB = VDD, the device will be turned off and CPTVREF dis-

abled.

CPTSIN

AC coupled analog signal input pin for CPT detector.

CPTENB

CPT detector enable control pin.

CPTENB = VSS: normal operation mode.

CPTENB = VDD: disabled mode.

CPTX1

CPTX2

CPTX1 and CPTX2 are connected to an external 32768Hz crystal or res-

onator for the CPT detector clock source.

The oscillator is turned off in the CPT detector disabled mode.

X1 and X2 are connected to an external 32768Hz crystal or resonator for

the system clock.

¾¾

External low pass filter pin used for the frequency up conversion circuit.

RES

Schmitt trigger reset input. Active low.

VDD

¾¾

Positive power supply

VSS

¾¾

Negative power supply, ground.

VDD2

¾¾

DTMF receiver positive power supply

VSS2

¾¾

DTMF receiver negative power supply

VDD4

¾¾

Positive power supply for CPT detector

VSS4

¾¾

Negative power supply for CPT detector

Note:

Each pin on PA can be programmed through a configuration option to have a wake-up function.

Absolute Maximum Ratings

Supply Voltage ...........................VSS

-0.3V to VSS+6.0V

Storage Temperature ............................

-50°Cto125°C

Input Voltage..............................VSS

-0.3V to VDD+0.3V

Operating Temperature...........................

-40°Cto85°C

IOL Total ..............................................................150mA

IOH Total............................................................

-100mA

Total Power Dissipation .....................................500mW

Note: These are stress ratings only. Stresses exceeding the range specified under

²Absolute Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed

in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.

HT95R45

Rev. 1.00

March 12, 2010

HT95R45 データシート(PDF) 4 Page - Holtek Semiconductor Inc

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