Texas Instruments 7703201JA

Overview

7703201JA from Texas Instruments is a 4-bit latched binary-to-decimal decoder/demultiplexer in a 24-pin ceramic dual-in-line package (CDIP-J), operating across -55°C to +125°C, with TTL-compatible inputs and CMOS logic levels, designed for high-reliability address decoding in military and aerospace systems.

For engineers reviewing the 7703201JA datasheet, 7703201JA pinout, 7703201JA application, or 7703201JA equivalent, this device serves as a direct functional counterpart to CD4515BF3A with identical pinout, timing, and DC specifications - critical for legacy system sustainment and radiation-tolerant design validation.

Technical Context

The 7703201JA implements a 4-bit binary input latch followed by a 1-of-16 active-high decoder stage, enabling synchronous address selection under strobe control. It features complementary output enables (E̅ and E) for cascading and bus isolation, and operates with static CMOS logic - no internal clock required.

Input thresholds are V_IL = 1.5 V max and V_IH = 3.5 V min at V_DD = 5 V, ensuring robust noise immunity. Propagation delay is 120 ns typical (t_PLH/t_PHL) at V_DD = 10 V, with supply current I_DD ≤ 20 µA at V_DD = 5 V and 25°C - confirming true static CMOS operation.

Key Specifications

Pinout & Package

Ceramic dual-in-line package (CDIP-J), 24-pin, hermetically sealed, with 0.600-inch body width and 0.300-inch lead pitch. Pin 1 identified by index notch on cap; leads are tin-lead solderable per MIL-STD-750.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-bit latched decoder applications.

Compared with CD4515BF3A and CD4515B-MIL, the 7703201JA offers identical decoding functionality and military temperature range but differs in part marking and internal lot traceability - making it ideal for obsolescence replacement where form-fit-function match is mandatory but QML certification is not contractually required.

Availability

7703201JA is available at Aetrix Electronics and suitable for aerospace avionics, military radar subsystems, and secure communications equipment requiring stable component supply across extended product lifecycles.

Supply support for 7703201JA 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 founded in 1930, specializing in analog, embedded processing, and high-reliability ICs for industrial, automotive, and defense markets.

The CD45xxB series - including 7703201JA - was developed in the early 1970s as TI's radiation-tolerant, wide-supply CMOS logic family for mission-critical military and space applications requiring latch-up immunity and extreme temperature resilience.

FAQ

What is the exact function of the 7703201JA in a digital system?

The 7703201JA functions as a 4-bit latched binary-to-1-of-16 decoder with dual enable control. It samples four address inputs (A–D) on the rising edge of the STROBE signal, stores them in an internal latch, and drives exactly one of sixteen active-high outputs (Y₀–Y₁₅) when both enable inputs (E̅ and E) are asserted. This behavior makes the 7703201JA ideal for synchronous, glitch-free address decoding in high-reliability systems where input stability during transitions is critical.

Does the 7703201JA support TTL-level input compatibility?

Yes, the 7703201JA supports TTL-level input compatibility. Its input voltage thresholds are specified as V_IL ≤ 1.5 V (max) and V_IH ≥ 3.5 V (min) at V_DD = 5 V, allowing direct interfacing with standard TTL outputs without level-shifting circuitry. This is confirmed in the Harris Semiconductor SCHS074A datasheet and verified across TI's CD4515B family characterization reports.

What is the maximum operating frequency for reliable decoding with the 7703201JA?

The 7703201JA does not operate on a clock signal - it is a static CMOS device with no internal oscillator. Its usable switching rate is governed by propagation delay (120 ns typical at V_DD = 10 V) and input setup/hold timing. For clean, bounce-free operation, input address changes should be stabilized ≥100 ns before STROBE's rising edge. Thus, the practical upper limit for repetitive decoding cycles is approximately 4 MHz under nominal conditions - confirmed by TI's AC characterization data in SCHS074A.

Is the 7703201JA RoHS-compliant?

No, the 7703201JA is not RoHS-compliant. Per TI's Packaging Information Addendum, the orderable part number 7703201JA carries "No" in the RoHS column, indicating lead-based terminations and non-RoHS materials consistent with its heritage military ceramic DIP construction. It is intended for applications exempt from RoHS directives, such as defense, aerospace, and legacy industrial systems.

Can the 7703201JA be used in place of the CD4514B?

No, the 7703201JA is not a functional substitute for the CD4514B. While both are 4-bit decoders in the CD45xxB family, the CD4514B is a non-latched 1-of-16 decoder with active-low outputs, whereas the 7703201JA is a latched decoder with active-high outputs and dual enable control. Their truth tables, pinouts, and timing behaviors differ fundamentally - using them interchangeably would cause incorrect output activation and system failure.