Texas Instruments SN54LS30J

Overview

SN54LS30J from Texas Instruments is a military-grade quad 2-input NAND gate IC in ceramic dual in-line package (CDIP), operating over −55°C to +125°C, with typical propagation delay of 15 ns at V_CC = 5 V, I_OL = 8 mA, and fan-out of 10 LS-TTL loads. It serves as a fundamental combinational logic building block in hardened digital control systems, missile guidance sequencers, and avionics timing circuits.

For engineers reviewing the SN54LS30J datasheet, SN54LS30J pinout, SN54LS30J application, or SN54LS30J equivalent, this page delivers verified electrical parameters, military-qualified thermal and packaging specs, functional truth table alignment, and direct alternatives for radiation-tolerant or extended-temperature logic design.

Technical Context

The SN54LS30J implements four independent 2-input NAND gates using low-power Schottky (LS) TTL technology, with input clamping diodes and totem-pole outputs. Its logic threshold is V_IL = 0.8 V max and V_IH = 2.0 V min, ensuring compatibility with standard TTL families across full military temperature range.

It features guaranteed AC performance including t_PLH/t_PHL ≤ 15 ns (max), output drive capability of I_OH = −400 µA and I_OL = +8 mA, and supply current I_CC = 19 mA max at V_CC = 5.5 V - all specified under worst-case military conditions.

Key Specifications

Pinout & Package

Ceramic Dual In-Line Package (CDIP), Package Drawing J, 14-pin, hermetically sealed with glass-frit lid per MIL-STD-1835 GDIP1-T14. Max height 5.08 mm. Pin 1 identified by optional index mark on cap.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NAND gate logic applications.

Compared with SN54LS30J, SNJ54LS30J offers identical performance and qualification but distinct logistics tracking, while SN74LS30N provides cost-effective access to the same logic function at commercial temperature range and reliability level - enabling tiered sourcing strategies across development, qualification, and production phases.

Availability

SN54LS30J is available at Aetrix Electronics and suitable for missile guidance systems, satellite command telemetry units, and avionics power management requiring stable component supply across extended lifecycle programs.

Supply support for SN54LS30J 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and high-reliability logic solutions for industrial, automotive, and defense markets.

The SN54LS30J belongs to TI's military logic family designed specifically for ruggedized digital control in aerospace, defense, and space applications where extended temperature operation and QML certification are mandatory.

FAQ

What is the maximum operating temperature range for SN54LS30J?

The SN54LS30J is rated for continuous operation from −55°C to +125°C, fully qualified per MIL-PRF-38535 Class V for use in extreme environmental conditions such as high-altitude flight, space vacuum thermal cycling, and desert-deployed ground systems. This range is guaranteed across all electrical parameters in the official TI datasheet SDLS099.

Is SN54LS30J pin-compatible with SN74LS30N?

Yes, SN54LS30J is pin-compatible with SN74LS30N - both use 14-pin DIP footprints with identical pin assignments for inputs, outputs, V_CC, and GND. However, SN54LS30J uses a ceramic package (CDIP-J) while SN74LS30N uses plastic (PDIP-N), so PCB land patterns differ in thermal and mechanical requirements despite matching pin count and function.

Does SN54LS30J support 3.3 V logic interfaces?

No, SN54LS30J is strictly a 5 V TTL device requiring V_CC between 4.5 V and 5.5 V. Its input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V) and output levels (V_OL ≤ 0.5 V, V_OH ≥ 2.7 V) are defined for 5 V operation only. Direct interfacing with 3.3 V logic requires level-shifting circuitry or translation buffers.

What is the propagation delay specification for SN54LS30J?

The maximum propagation delay for SN54LS30J is 15 ns, measured from input transition (50% point) to output transition (50% point) under worst-case conditions: V_CC = 4.5 V, T_A = −55°C, R_L = 2 kΩ to V_CC, C_L = 15 pF. Typical delay is 10 ns at 25°C and 5 V, as documented in TI's SDLS099 datasheet.

Can SN54LS30J be used as a substitute for SN54S30J?

SN54LS30J and SN54S30J share identical pinout and logic function but differ in speed-power trade-off: SN54S30J has faster propagation delay (~5 ns) but higher power consumption, while SN54LS30J offers lower power with 15 ns delay. Substitution is electrically valid if timing margins allow the slower delay and system power budget favors LS technology.