Texas Instruments 7604501EA

Overview

7604501EA from Texas Instruments is a military-grade BCD-to-seven-segment decoder/driver IC with open-collector outputs, designed for direct interface to common-anode LED displays. It features active-low lamp test (LT̅), blanking (BI̅/RBO̅), and ripple-blanking input/output (RBI̅) functions, operates over –55°C to +125°C, and supports TTL-compatible input logic levels.

For engineers reviewing the 7604501EA datasheet, 7604501EA pinout, 7604501EA application, or 7604501EA equivalent, this device is selected for high-reliability digital display systems requiring radiation-tolerant packaging, extended temperature operation, and discrete segment current control without external drivers.

Technical Context

The 7604501EA implements combinational logic decoding of 4-bit binary-coded decimal (BCD) inputs into seven active-low segment outputs (a–g), with built-in logic for leading-zero suppression via ripple-blanking cascade. Its open-collector outputs allow wired-OR configuration and support up to 40 mA per segment sink current.

It integrates three control inputs-lamp test (LT̅), blanking (BI̅/RBO̅), and ripple-blank input (RBI̅)-enabling system-level display testing, dynamic blanking, and multi-digit zero suppression in cascaded numeric displays without additional logic.

Key Specifications

Pinout & Package

The 7604501EA is housed in a 16-pin ceramic dual in-line package (CDIP-J), 0.300-inch wide, with 0.100-inch lead pitch and hermetic glass-frit seal per MIL-STD-1835 GDIP1-T14. Pin 1 is marked by an optional index dot on the cap.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar BCD-to-seven-segment decoder/driver applications.

Compared with SN54LS47J and SN74LS47N, the 7604501EA provides verified QML-38535 Class V qualification, hermetic CDIP packaging, and full traceability - making it the sole option for flight-critical or deployed defense hardware requiring lifetime reliability assurance.

Availability

7604501EA is available at Aetrix Electronics and suitable for aerospace instrumentation, defense status panels, and industrial process controllers requiring stable component supply across extended product lifecycles and harsh environmental conditions.

Supply support for 7604501EA 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 company founded in 1930, specializing in analog, embedded processing, and high-reliability logic solutions for industrial, automotive, and defense markets.

The 7604501EA belongs to TI's legacy military logic family, designed specifically for high-integrity digital display subsystems where failure modes must be bounded by MIL-STD-883 testing and hermetic packaging.

FAQ

What is the primary function of the 7604501EA?

The 7604501EA is a BCD-to-seven-segment decoder/driver IC with open-collector outputs optimized for common-anode LED displays. It converts 4-bit binary-coded decimal inputs into active-low segment signals (a–g), includes lamp test (LT̅), blanking (BI̅/RBO̅), and ripple-blanking (RBI̅) controls, and is fully specified for –55°C to +125°C operation in a hermetic CDIP package. The 7604501EA delivers deterministic segment drive without external transistors.

Does the 7604501EA support zero suppression in multi-digit displays?

Yes, the 7604501EA supports both leading and trailing zero suppression through its dedicated ripple-blanking input (RBI̅) and ripple-blanking output (RBO̅/BI̅) pins. When configured in cascade, the 7604501EA asserts RBO̅ low only when displaying digit "0" and RBI̅ is inactive, enabling automatic blanking of redundant zeros across digit positions. This functionality is confirmed in the SDLS111 datasheet and requires no firmware intervention. The 7604501EA implements this feature using internal combinational logic, not state machines or memory.

What package type and mounting compatibility does the 7604501EA have?

The 7604501EA uses a 16-pin ceramic dual in-line package (CDIP-J) with 0.300-inch body width, 0.100-inch lead pitch, and hermetic glass-frit seal per MIL-STD-1835 GDIP1-T14. It is compatible with standard through-hole wave-solder or hand-solder processes, and its land pattern matches JEDEC MS-001. The 7604501EA does not require reflow profile adaptation and is not compatible with SOIC or PDIP footprints due to mechanical and thermal expansion differences.

Can the 7604501EA drive common-cathode LED displays?

No, the 7604501EA is designed exclusively for common-anode LED displays. Its open-collector outputs sink current from segment anodes tied to V_CC, and all segment outputs are active-low. Driving a common-cathode display would require external inverters or PNP transistors to reverse logic polarity and sourcing capability - which negates the integrated design intent. The 7604501EA datasheet explicitly specifies common-anode interface; no alternate configuration is supported or characterized.

Is the 7604501EA RoHS compliant?

The 7604501EA is not RoHS compliant in its standard configuration. As a military-spec CDIP device manufactured prior to RoHS enforcement, it contains leaded solder in the hermetic seal and leaded finish on leads. TI's packaging addendum confirms "TBD" for Eco Plan and "Call TI" for Lead/Ball Finish, indicating non-RoHS materials. For RoHS-compliant alternatives, consider SN74LS47N or SN74LS47DR - but note these lack the 7604501EA's temperature range, hermeticity, and QML qualification.