onsemi CD4050BCMX

Overview

CD4050BCMX from Fairchild Semiconductor is a hex non-inverting buffer IC designed for logic-level translation and CMOS-to-TTL interfacing. It operates across 3.0V–15V supply, delivers ±12 mA continuous output current, supports input voltages exceeding VDD, and drives two TTL loads directly at 5V over −55°C to +125°C. It is used in industrial control I/O expansion where level-shifting and robust drive capability are required.

For engineers reviewing the CD4050BCMX datasheet, pinout, applications, or equivalent options, key selection criteria include its non-inverting topology, wide VDD range, input overvoltage tolerance, TTL load drive capability at temperature extremes, and SOIC-16 packaging for space-constrained PCBs.

Technical Context

The CD4050BCMX implements six independent CMOS non-inverting buffer stages using complementary N- and P-channel enhancement-mode transistors. Each stage provides true logic-level buffering without inversion, enabling bidirectional voltage translation when V_IN > V_DD, with guaranteed VIH/VIL thresholds defined per supply voltage (e.g., VIH ≥ 3.5V at VDD = 5V).

Its DC-coupled architecture supports single-supply operation and features input protection that permits VIN up to 18V regardless of VDD, while output voltage swing remains rail-to-rail (0V to VDD) under light load. Propagation delays range from 20 ns (VDD = 10V) to 30 ns (VDD = 15V) for tPHL/tPLH, with transition times under 45 ns.

Key Specifications

Pinout & Package

CD4050BCMX is supplied in a 16-lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" narrow body package (Package Number M16A). Pin pitch is 0.050", body width 0.150", and total length 0.390".

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex non-inverting buffer applications.

Compared with MC74HC4050DTG and SN74LVTH16244DGGR, the CD4050BCMX uniquely supports 3–15V operation and input overvoltage tolerance - making it irreplaceable in multi-rail industrial and automotive signal conditioning where voltage domain bridging is essential.

Availability

CD4050BCMX is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and programmable logic power sequencing requiring stable component supply across extended temperature and voltage ranges.

Supply support for CD4050BCMX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and interface ICs before its acquisition by ON Semiconductor in 2016.

The CD4050BCMX belongs to Fairchild's legacy CD4000-series CMOS logic family, engineered for rugged, wide-supply-voltage digital interfacing in industrial, automotive, and aerospace systems where reliability across extreme conditions is critical.

FAQ

What is the maximum input voltage allowed on CD4050BCMX inputs?

The CD4050BCMX allows input voltages from −0.5V to +18V, independent of VDD. This overvoltage tolerance enables safe interfacing with higher-voltage logic sources (e.g., 12V microcontrollers) into lower-VDD systems. The absolute maximum rating is specified in the datasheet, and operation above VDD + 0.5V relies on internal protection circuitry - ensure current limiting is applied externally if sustained overvoltage is expected. CD4050BCMX maintains functionality across this full range when VDD is within 3–15V.

Can CD4050BCMX drive TTL loads directly at 125°C?

Yes, CD4050BCMX is rated to drive two standard TTL loads directly at 5V across its full operating temperature range of −55°C to +125°C. This capability is explicitly confirmed in the datasheet's General Description and supported by DC electrical characteristics showing IOL ≥ 3.2 mA and IOH ≥ −0.72 mA at VDD = 5V and TA = +125°C. CD4050BCMX achieves this with minimal derating due to its CMOS process and thermal design - no external buffers are needed for basic TTL fan-out in harsh environments.

Does CD4050BCMX have built-in ESD protection?

CD4050BCMX incorporates input protection circuitry that enables safe handling of input voltages up to 18V - a feature that inherently improves robustness against ESD transients. While the datasheet does not specify an exact HBM or CDM ESD rating, the special input protection structure described in the Features section provides practical immunity beyond standard CMOS devices. For mission-critical applications, pairing CD4050BCMX with external TVS diodes is still recommended - especially on long traces or connector-facing pins - but CD4050BCMX itself offers enhanced resilience compared to unbuffered CMOS inputs.

What is the difference between CD4050BCMX and CD4049UBCMX?

CD4050BCMX is a hex non-inverting buffer, whereas CD4049UBCMX is a hex inverting buffer - their logic functions are complementary. Both share identical supply range (3–15V), input overvoltage tolerance, and output drive capability, but CD4050BCMX preserves signal polarity while CD4049UBCMX inverts it. Pinouts are identical (16-pin SOIC), allowing PCB layout reuse when logic inversion is acceptable. CD4050BCMX is selected when signal integrity requires no polarity change - such as in clock distribution, enable lines, or bus direction controls where inversion would break protocol timing.

Is CD4050BCMX RoHS compliant?

CD4050BCMX, as manufactured by Fairchild prior to its acquisition, was produced in RoHS-compliant versions - specifically the "M" suffix (e.g., CD4050BCM) denotes lead-free, halogen-free packaging meeting EU RoHS Directive 2011/65/EU. The "X" suffix indicates tape-and-reel packaging, which does not affect compliance status. Aetrix Electronics supplies only RoHS-compliant CD4050BCMX units sourced from authorized channels, with full material declarations and test reports available upon request for CD4050BCMX.