Cmedia

CM108B

Encoder/decoder 44.1kHz~48kHz LQFP-48(7x7) Audio Special Purpose RoHS

LQFP-48(7x7)ROHS CompliantActive

USB Audio Single Chip

Manufacturer: Cmedia
Manufacturer part #: CM108B
Store part #: C371347
Package / case: LQFP-48(7x7)
Category: Audio Special Purpose
Packaging: Tray

Datasheet (PDF)

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1,450 in stock

#C371347

Stock & price checked 5 days ago

Quantity	Unit price	Pack price
1+	₹476.11	₹476.11
10+	₹404.61	₹4,046.10
30+	₹360.07	₹10,802.10
250+	₹298.14	₹74,535.00
500+	₹277.50	₹1,38,750.00
1,000+	₹268.37	₹2,68,370.00

Quantity (min 1)

1 × ₹476.11

₹476.11

excl. GST

₹561.81 incl. 18% GST

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Standard pack: 250 per tray

CM108B

₹476.11 for 1 + GST

Specifications

Type: Encoder/decoder
Operating Temperature: -20℃~+70℃
Features: Built-in phase-locked loop;On-chip digital gain;Mute control;Non-volatile configuration storage
Interface: USB;I2S
Resolution (Bits): 44.1kHz~48kHz
Voltage - Supply: 4.5V~5.5V

Packaging & compliance

RoHS: ROHS Compliant
Lifecycle: Active
Packaging: Tray
Standard pack: 250 / Tray
Sold per: Piece
Minimum order: 1
Unit weight: 0.742 g

Overview

The CM108B is a highly integrated crystal-free USB audio single chip solution optimized for USB headset, headphone, and dongle applications. The CM108B comes with software driver interface which supports "Xear" sound effects for multimedia entertainments. All essential analog modules are embedded in the CM108B, including dual DAC and earphone driver, ADC, microphone booster, PLL, regulator and USB transceiver modules. Many features are programmable with jumper pins or by external EEPROM. Audio adjustments are easily controlled via specific HID-compliant volume control pins. An external codec or audio DSP can be connected to the CM108B via I2S pin for further processing. Vendors can customize unique USB VID/PID/Product String/Manufacture String and min/max/initial volumes to EEPROM. The CM108B also comes with an anti-pop noise circuits design and internal oscillator which can operate without an external crystal oscillator.

Key features

Compliant with USB 2.0 Full Speed Operation
Compliant with USB Audio Device Class Specification v1.0
Supports USB Suspend/Resume Mode and Remote Wakeup with Volume Control pins
On-chip oscillator that provides reference sources for PLL and embedded USB transceiver
Jumper pin for Headset Mode (Playback + Recording) and Speaker/Headphone Mode (Playback Only)
Jumper pin for Mixer Unit enable/disable under Headset Mode and Power Mode setting
I2S interfaces for external CODEC
Anti-pop noise design for plugged and vice-versa
Support Xear Audio Centre Software Driver for Windows OS
Supports one control endpoint, one isochroous OUT endpoint, one isochroous IN endpoint, and one interrupt IN endpoint
Alternate zero bandwidth setting for releasing playback bandwidth on USB Bus when device is inactive
Supports AES/EBU, IEC60958, S/PDIF consumer formats for stereo PCM data at S/PDIF output
Volume up, volume down, and playback mute pins support USB HID for host control synchronization
Record mute pin with LED indicator for record mute status
Includes external EEPROM Interface for Vendor Specific USB VID, PID, Product String, Manufacture String, and max/min/initial volumes
3 GPIO pins with read/write via HID interface
Jumper pin to set the power mode (100mA or 500mA, Bus-powered or self-powered)
Isochronous transfer uses adaptive mode with internal PLL for synchronization
48K/44.1KHz sampling rate for both playback and recording
Soft mute function
Embedded 16-bit ADC input with microphone