Details, datasheet, quote on part number: SM8221S
PartSM8221S
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Description
CompanyNippon_Precision_Circuits America
DatasheetDownload SM8221S datasheet
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Features, Applications

The SM8220/SM8221 Calling Number Identification Receiver is a CMOS integrated circuit, which provides an interface to various calling information delivery services such as Calling Number Delivery (CND) and Calling Name Delivery (CNAM) compatible with the Bellcore GR-30-CORE. The device also contains a power down circuit, a ring detect circuit and a carrier detect circuit for easier system implementation.

FEATURES

Compatible with Bellcore GR-30-COREIntegrated band pass filterFSK demodulator Bell 202 and ITU-T V.23High input sensitivity: -48 dBm typicalRing detect outputCarrier Detect Output (SM8220)Power down mode: 1A power down currentUses 3.579545 MHz crystal (SM8220) or external clock sourcePower supply voltage: to 5.5VLow power consumptionMolybdenum-gate CMOS processPackage SM8220: 16 pin SOP, 16 pin DIP SM8221: 8 pin SOP, 8 pin DIP

APPLICATIONS

Calling Number Delivery serviceAdjunct BoxesTelephone Answering MachinesFeature PhonesFax MachinesComputer Interface Products

TIP RING AGND RDIN RDRC RDET PDWN GND
VDD FOUT DMIN DOUT NC CDET OSCOUT OSCIN /CLKIN


Number 2 3 TIP RING AGND RDIN RDRC RDET PDWN o si Tip Input: This pin is connected to the tip side of the twisted pair telephone wires. This pin must be DC isolated from the phone line. Ring Input: This pin is connected to the ring side of the twisted pair telephone wires. This pin must be DC isolated from the phone line. Analog Ground: 1/2 VDD voltage output. This pin must be grounded through 0.1 F capacitor. Ring Detect Input: The attenuated ring signal is connected to this pin for the ring detection. Ring Detect RC Terminal: An RC network will be connected to this pin to set time delays for the ring signal detection. Ring Detect Output: This pin is an output of a schmitt trigger buffer which input is connected to RDRC pin. The low level at this pin indicates that the ring signal is detected. Power Down Control: This pin must be kept at low level for the normal operation. When it is high, the device will be in the power down. Under the power down mode, OSCOUT, CDET and DOUT pins are set to high level and AGND, FOUT pins are set to high impedance. GND OSCIN /CLKIN OSCOUT CDET NC DOUT DMIN FOUT VDD Device Ground: This pin is connected to the system ground. Crystal Oscillator Input: A crystal will be connected between this pin and OSCOUT pin. This pin may be driven from an external clock source. Crystal Oscillator Output: A crystal will be connected between this pin and OSCIN pin. This pin must be kept open when OSCIN pin is driven from an external clock source. Carrier Detect Output: When low, this output indicates that a valid carrier present on the line. No connection pin. Data Out: This pin presents the output of the demodulator while CDET pin is low. When CDET pin goes high, this pin is held high. Demodulator Input: This pin is connected from FOUT pin through a 0.1F capacitor. No other components should be connected to this pin. Band Pass Filter Output: This pin is connected to DMIN pin through a 0.1F capacitor. No other components should be connected to this pin. Power Supply: Positive power supply pin. (Note) si: Schmitt Triger Input, od: Open Drain Output. Name i/o Function


 

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