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CJ125B reference image
Reference image 32

CJ125B

oxygen-sensor control and evaluation IC for Bosch LSU wideband lambda sensors

Series
CJ125
Package
32-lead LQFP, 7 mm × 7 mm
Temperature
-40°C to +150°C junction
Specifications

Key details

Part NumberCJ125B
ManufacturerBosch
CategoryOxygen Sensor Interface IC
Lifecycle StatusProduction
SeriesCJ125
Package / Case32-lead LQFP, 7 mm × 7 mm
Pin Count32
Operating Temperature-40°C to +150°C junction
Last Verified2026-07-19
Overview

Part information

CJ125B Overview

CJ125B is a Bosch oxygen-sensor control and evaluation IC for Bosch LSU wideband lambda sensors supplied in 32-lead LQFP, 7 mm × 7 mm. This page uses the exact orderable code because package, grade, temperature and option suffixes can change compatibility.

Key Technical Specifications

Supported Sensors Bosch LSU 5.2, LSU 4.9, LSU ADV and LSU 4.2
Interface SPI
Functions Lambda measurement, heater control and diagnostics
Package Size 7 mm × 7 mm
Application Automotive exhaust-gas oxygen sensing

Package and Ordering Notes

The listed package is 32-lead LQFP, 7 mm × 7 mm with 32 pins, leads, lands or contacts. The featured image is a generic package illustration for form-factor identification and is not an actual date-code or lot photograph. The part or family is listed by Bosch as Production at the verification date.

Sourcing Guidance

Confirm current factory lead time, packing format and revision for CJ125B before placing the order.

For an accurate quotation, include the full MPN, target quantity, acceptable date-code range, packaging format and destination. Icearth can help review traceability documents, label photos and electrical/package alignment before order placement.

Manufacturer Documentation

Technical values were checked against Bosch documentation. Use the linked datasheet as the controlling source and re-check revisions before PCB release or firmware qualification.

Sourcing notes

Lifecycle and sourcing review

Production

Lifecycle information is shown for reference. Confirm current manufacturer documentation, availability and technical suitability before purchase.

Confirm current factory lead time, packing format and revision for CJ125B before placing the order.