ICL7136CM44

ADCs/DACs - Special Purpose Overview

The ICL7136CM44 is a discontinued low-power, 3½-digit analog-to-digital converter (ADC) with an integrated LCD driver. Manufactured by Renesas Electronics Corporation, it utilizes a dual-slope integration architecture to provide high accuracy for DC voltage measurements. The device operates on a single 9V supply and features a 44-pin MQFP surface-mount package. It includes direct drive capabilities for common-anode LCDs, eliminating the need for external multiplexing logic in simple display applications.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 3½-digit ADC with direct LCD driver output
• Single 9V power supply operation
• Surface-mount 44-MQFP (10x10 mm) package
• Commercial temperature range of 0°C to 70°C

ADCs/DACs - Special Purpose Applications

• Battery-powered digital multimeters
• Industrial process control panel displays
• Portable test equipment with LCD readouts

ADCs/DACs - Special Purpose Procurement Notes

This component is officially listed as obsolete and no longer manufactured by Renesas Electronics. Current availability is limited to existing stock from distributors or secondary market sources. Verification of authenticity and lot traceability is critical when sourcing from non-authorized channels due to the part's end-of-life status.

ADCs/DACs - Special Purpose Selection Notes

Designers requiring this specific pinout and functionality must source remaining inventory or evaluate replacement options carefully. While similar devices exist in the ICL7136 family, differences in package type (e.g., DIP vs. QFP) or suffix variations may require schematic and PCB layout modifications. Confirm that the replacement supports the required 44-MQFP form factor.

ADCs/DACs - Special Purpose Part Context

The ICL7136 series represents a classic generation of monolithic ADCs widely used in instrumentation before the prevalence of microcontroller-integrated ADCs. The CM44 variant specifically denotes the 44-lead plastic quad flat pack package. Analog Devices and Maxim Integrated also produced compatible versions under the same base numbering scheme following industry acquisitions.

ADCs/DACs - Special Purpose Replacement Considerations

ICL7136CMH+D: Direct functional equivalent from Analog Devices/Maxim Integrated in a different package. ICM7224IPL+: Similar 3½-digit ADC but requires verification of pin compatibility.