Communication ICs PCM codec IC for digital cellular telephones BU8733KV The BU8733KV is a PCM codec IC developed for use with digital cellular telephones. The BU8733KV contains analog input / output features such as a 14-bit linear precision, / A-LAW codec, mic and speaker amplifiers, and a switching transistor for the ringer drive. Also, there is a built-in DSP interface circuit for support of multiple DSP formats making this IC perfect for use with PDC cellular telephones. Applications Digital cellular telephones Features 1) 3V single power supply (VDD = 2.7V to 3.3V). 2) Built-in 14-bit precision linear, / A-LAW codec. 3) Transmission filter for the codec unit conforms to ITU-T recommendations. 4) Built-in PLL circuit for system clock generation. 5) Tone signal generator contains DTMF signal, scale tone, and variable tone functions. 6) Analog input / output functions: Built-in mic amplifier. Built-in receiver speaker amplifier (32 BTL type). Built-in attenuator for wide gain adjustment range. Data signal I / O circuit allows for connection to external devices. For the external output and receiver output, softmute function reduces pop noise when the power is turned on and off. 7) Internal switching transistor for ringer drive. 8) Internal DSP interface circuit supports multiple DSP formats. Absolute maximum ratings (Ta = 25C) 599 Communication ICs Recommended operating conditions (Ta = 25C) Block diagram 600 BU8733KV Communication ICs BU8733KV Pin descriptions 601 Communication ICs 602 BU8733KV Communication ICs BU8733KV Electrical characteristics(unless otherwise noted, Ta = 25C, DVDD = RXVDD = TXVDD = 3.0V, FSYNC = 8kHz, gain of each attenuator = 0dB) 603 Communication ICs 604 BU8733KV Communication ICs BU8733KV 605 Communication ICs Digital AC characteristics 606 BU8733KV Communication ICs BU8733KV Measurement circuit 607 Communication ICs Application example 608 BU8733KV Communication ICs BU8733KV External dimensions (Units: mm) 609 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document use silicon as a basic material. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction. Appendix1-Rev1.0