sony: Sony Advanced Low Voltage Single Chip Radio IC (1992)

ID: 554806
This article refers to the model: FM/AM Walkman SRF-49 North America (Sony Corporation; Tokyo)

sony: Sony Advanced Low Voltage Single Chip Radio IC (1992) 
02.May.21 17:27
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Jose Mesquita (P)
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Jose Mesquita

In the early 90's Sony development team has designed an Advanced Low Voltage Single Chip Radio IC that was used exclusively on Sony radios, most of them analog pocket radios.

The radios production using this new technology started at around 1992 and lasted until at least to mid 2000 under the models prefix "SRF" with one exception. Among these radios are the initial SRF-39, followed by the 39FP (Federal Prision with transparent cabinet), SRF-49, SRF-85 (Sports), SRF-PSY03, SRF-59, SRF-S80, SRF-S83, SRF-S84, and SRF-S87 (Sports).

The new radio IC was then marked with the reference CXA1129N and listed with the Sony Code Number 8-752-061-76 in the Sony Service Manuals part list for each radio model.

This CXA1129N IC is able to work with just 0.95Volt at very low current consumption (dc-dc converters are not used in these radios), while offering performance levels only found on professional equipment at the time.

Below is a copy of the Sony paper for an Advanced Low Voltage Single Chip Radio IC submitted to IEEE in 1992, where we can find the technical details of the CXA1129N IC (as far as I know, Sony released a datasheet for this IC).

 

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