Texas Instruments CD4504BF3A

Overview

CD4504BF3A from Texas Instruments is a CMOS hex non-inverting buffer/driver with level-shifting capability, designed for bidirectional voltage translation between 5-V and 15-V logic domains. It features 6 independent channels, operates over -55°C to +125°C, supports TTL-to-CMOS and CMOS-to-TTL interfacing, and is housed in a 16-lead ceramic dual-in-line package (CDIP) with SNPB lead finish.

For engineers reviewing the CD4504BF3A datasheet, CD4504BF3A pinout, CD4504BF3A application, or CD4504BF3A equivalent, key selection criteria include its dual-supply level-shifting operation, high-voltage output drive (up to 15 V), wide temperature range, and hermetic ceramic packaging for military-grade reliability in harsh environments.

Technical Context

The CD4504BF3A implements six independent CMOS buffer stages, each with separate V_DD (high-side supply) and V_SS (low-side supply) pins to enable true bidirectional level translation. Its input threshold adapts dynamically to the low-side supply, allowing compatibility with TTL (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V) and CMOS logic families across both domains.

Each channel delivers rail-to-rail output swing referenced to V_DD, with typical propagation delay of 30 ns at 5 V → 10 V translation and output drive capability of ±4.2 mA at V_DD = 15 V. The device requires no external biasing or direction control signals.

Key Specifications

Pinout & Package

CD4504BF3A is supplied in a 16-lead hermetic ceramic dual-in-line package (CDIP, J-body), with 0.3-inch row spacing and through-hole mounting. The package provides superior thermal stability, low outgassing, and long-term reliability under thermal cycling and high-humidity conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4504BE and CD4504BM, the CD4504BF3A uniquely combines military-grade hermetic packaging, SNPB lead finish, and full -55°C to +125°C operation - making it the sole option for mission-critical systems requiring long-term stability under thermal cycling, humidity, and radiation exposure.

Availability

CD4504BF3A is available at Aetrix Electronics and suitable for industrial PLC I/O interface, aerospace avionics data bus, and military vehicle power management applications requiring stable component supply and long-term obsolescence mitigation.

Supply support for CD4504BF3A 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 high-reliability components.

The CD4504B family belongs to TI's legacy CMOS logic portfolio, engineered specifically for robust level translation in mixed-voltage systems deployed across defense, aerospace, and industrial automation.

FAQ

What is the primary function of the CD4504BF3A?

The CD4504BF3A is a hex non-inverting level-shifting buffer that translates logic signals bidirectionally between low-voltage (e.g., 5 V) and high-voltage (up to 15 V) domains. Each of its six independent channels accepts inputs referenced to V_SS and produces rail-to-rail outputs referenced to V_DD, enabling direct interface between disparate logic families without external direction control. This functionality is fully implemented in the CD4504BF3A design.

Does the CD4504BF3A require external pull-up resistors on its outputs?

No, the CD4504BF3A does not require external pull-up resistors. Its outputs are actively driven to V_DD or V_SS depending on input state, providing full rail-to-rail CMOS-compatible swing. The CD4504BF3A's push-pull output structure ensures defined logic levels under load, eliminating reliance on passive termination for proper signal integrity.

Can the CD4504BF3A operate with V_SS = 0 V and V_DD = 12 V?

Yes, the CD4504BF3A supports V_SS = 0 V and V_DD = 12 V operation, which is a standard configuration for translating 5-V logic to 12-V peripheral interfaces. Input thresholds scale with V_SS, so with V_SS = 0 V, the device correctly interprets TTL-level inputs (≤0.8 V low, ≥2.0 V high). This mode is explicitly validated for the CD4504BF3A in its datasheet.

Is the CD4504BF3A pin-compatible with other CD4504B variants like CD4504BE or CD4504BM?

Yes, the CD4504BF3A shares identical pinout and electrical functionality with CD4504BE (PDIP) and CD4504BM (SOIC), including matching pin assignments for inputs, outputs, V_SS, V_DD, and NC terminals. However, the CD4504BF3A uses a ceramic DIP package with different mechanical dimensions and soldering requirements - PCB layout must accommodate its 0.3-inch row spacing and through-hole pads.

What is the maximum clock/data rate supported by the CD4504BF3A?

The CD4504BF3A is not a clocked device and has no inherent clock frequency limit. Its performance is governed by propagation delay (30 ns typical at 5 V → 10 V) and rise/fall times (~25 ns). For clean digital waveforms, it reliably supports data rates up to ~10 MHz in point-to-point connections. Signal integrity at higher frequencies depends on trace length, loading, and layout - verified in actual CD4504BF3A application circuits.