Texas Instruments CD4504BMT

Overview

CD4504BMT from Texas Instruments is a CMOS hex non-inverting buffer/driver IC designed for level translation between TTL and MOS logic families, featuring 6 independent channels, ±20 mA output drive capability, and operation across -55°C to +125°C. It enables bidirectional voltage-level shifting in mixed-voltage digital systems such as industrial control interfaces and legacy bus adapters.

For engineers reviewing the CD4504BMT datasheet, CD4504BMT pinout, CD4504BMT application, or CD4504BMT equivalent, key selection criteria include its TTL-to-CMOS/MOS level-shifting function, SOIC-16 package compatibility with automated SMT assembly, wide temperature range support, and absence of internal pull-ups or direction control logic.

Technical Context

The CD4504BMT implements six identical CMOS buffer stages with Schmitt-trigger input hysteresis on each channel, enabling noise-immune signal conditioning. Its dual-supply architecture supports V_DD = 5 V to 20 V and V_SS = -5 V to 0 V, allowing true bipolar-level translation.

Each output delivers symmetrical sourcing/sinking current up to 20 mA at V_DD = 15 V, with propagation delay under 100 ns (typical) across the full operating voltage range. Input thresholds scale proportionally with V_DD, maintaining consistent logic margin regardless of supply configuration.

Key Specifications

Pinout & Package

CD4504BMT is housed in a 16-pin SOIC (D) package measuring 9.9 mm × 3.91 mm × 1.75 mm (max height), RoHS-compliant with NIPDAU lead finish and JEDEC Level-1 moisture sensitivity rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar level-shifting buffer applications.

Compared with CD4504BM and SN74HCT244N, the CD4504BMT uniquely supports dual-rail operation and industrial temperature range in a production-ready T&R format - making it the sole option for high-reliability, mixed-voltage SMT deployments.

Availability

CD4504BMT is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus interface adapters, and motor control signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD4504BMT 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in industrial, automotive, and aerospace electronics.

The CD4504BMT belongs to TI's CD4000-series CMOS logic family, engineered for robust operation in harsh environments and designed specifically for voltage-level translation and signal buffering in mixed-supply digital systems.

FAQ

What is the primary function of the CD4504BMT?

The CD4504BMT is a hex non-inverting buffer IC optimized for bidirectional level translation between TTL and higher-voltage MOS logic families. It allows clean interfacing of 5-V microcontrollers with 12-V or 15-V peripheral circuits without external components. Each of its six channels operates independently, with rail-to-rail output swing from V_SS to V_DD. The CD4504BMT achieves this using a dual-supply architecture that accepts separate positive and negative rails - a capability not found in standard single-supply buffers.

Does the CD4504BMT require external pull-up or pull-down resistors?

No, the CD4504BMT does not require external pull-up or pull-down resistors on its inputs or outputs. Its CMOS inputs have high impedance and defined thresholds scaling with V_DD, while its push-pull outputs actively drive both logic states. However, unused inputs should be tied to V_SS or V_DD to prevent floating nodes; NC pins (8 and 15) must remain unconnected. The CD4504BMT's design eliminates reliance on passive biasing, simplifying layout in space-constrained industrial modules.

Can the CD4504BMT operate with a single 5-V supply?

No, the CD4504BMT requires two supply connections: V_DD (positive rail, 5–20 V) and V_SS (negative or ground reference, –5 to 0 V). It cannot function with only a single 5-V supply because its internal level-shifting architecture depends on the differential between V_DD and V_SS. For single-supply 5-V applications, alternatives like the SN74HCT244N are appropriate - but they lack the CD4504BMT's voltage translation capability and extended temperature range.

What is the significance of the "MT" suffix in CD4504BMT?

Within Texas Instruments' naming convention, the "MT" suffix in CD4504BMT denotes a 16-pin SOIC (D) package supplied in a small tape-and-reel format containing 250 units. This distinguishes it from variants like CD4504BM (same die, 40-unit tube) or CD4504BPWR (TSSOP package, 2000-unit large reel). The CD4504BMT's packaging is optimized for high-throughput SMT assembly lines, offering consistent orientation, moisture-safe handling, and JEDEC Level-1 reflow compatibility - critical for repeatable manufacturing yield.

Is the CD4504BMT pin-compatible with other CD4504B variants?

Yes, all CD4504B variants - including CD4504BMT, CD4504BM, CD4504BE, and CD4504BPW - share identical pinouts and electrical functionality. Differences are limited to package type (SOIC, PDIP, TSSOP, CDIP), packaging format (tube vs. tape-and-reel), and material finish. Therefore, the CD4504BMT can be substituted for CD4504BM in existing SOIC footprints without PCB modification, provided the assembly process supports tape-and-reel feeding and the required reflow profile.