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Home > Products > Integrated Circuits (ICs) > Logic > Shift Registers

Texas Instruments SN54LS595J

Name: SN54LS595J
Brand: Texas Instruments
SKU: SN54LS595J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN54LS595J

Manufacturer:: Texas Instruments

Category:: Shift Registers

Package:: 16-CDIP (0.300", 7.62mm)

Datasheet:: SN54LS595J.pdf

Description:: 8-BIT SHIFT REGISTERS WITH OUTPU

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Product details

Overview

SN54LS595J from Texas Instruments is a military-grade 8-bit serial-in, parallel-out shift register with output latches and three-state outputs, operating across -55°C to +125°C, featuring TTL-compatible inputs, 16-pin CDIP package, and direct cascading capability via Q_H and SER pins for multi-stage expansion.

For engineers reviewing the SN54LS595J datasheet, SN54LS595J pinout, SN54LS595J application, or SN54LS595J equivalent, key selection considerations include extended temperature operation, non-RoHS leaded finish (SNPB), QML-qualified military reliability, and compatibility with legacy 74LS logic families in avionics, test equipment, and radiation-tolerant control systems.

Technical Context

The SN54LS595J implements dual-register architecture: a shift register stage accepting serial data on each rising clock edge, and a storage latch stage that transfers shifted data to parallel outputs upon RCLK assertion. It supports synchronous clear (SRCLR) and enables three-state output control (OE) for bus sharing.

Designed for high-reliability environments, it meets MIL-PRF-38535 Class V requirements, uses silicon-gate bipolar technology for stable propagation delay (t_PLH/t_PHL ≤ 35 ns at V_CC = 5V), and maintains full functionality under extreme thermal cycling and mechanical shock per military specifications.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	74LS TTL - ensures interoperability with legacy LS-series logic and predictable noise margins in mixed-technology boards.
Operating Temperature	-55°C to +125°C - qualified for deployment in aerospace vehicle electronics, ground support test benches, and defense subsystems.
Supply Voltage	4.5V to 5.5V - supports stable operation under regulated 5V military power rails with ±10% tolerance.
Propagation Delay	Max 35 ns (CLK to Q) - enables reliable 20 MHz shift clock operation in real-time data distribution paths.
Output Drive	IOH/ IOL = -0.4 mA / 8 mA - sufficient to drive multiple TTL inputs or small LED loads without external buffers.
Package Type	CDIP (J), 16-pin - hermetically sealed ceramic dual in-line package for moisture resistance and long-term reliability in harsh environments.

Pinout & Package

Ceramic Dual In-line Package (CDIP), 16-pin, through-hole mounting, hermetic seal, SNPB lead finish, RoHS-exempt, MSL N/A.

Pin/Terminal	Circuit Role	Design Meaning
1 (Q₀)	Parallel Output	LSB of latched 8-bit parallel output; driven low/high only when OE is inactive.
2 (Q₁)	Parallel Output	Second bit of latched parallel output; synchronized to RCLK, not CLK.
3 (Q₂)	Parallel Output	Third bit of latched parallel output; isolated from shift register until RCLK pulse.
4 (Q₃)	Parallel Output	Fourth bit of latched parallel output; enables byte-wide readback after shifting.
5 (Q₄)	Parallel Output	Fifth bit of latched parallel output; supports daisy-chained configurations via Q_H.
6 (Q₅)	Parallel Output	Sixth bit of latched parallel output; retains state during new serial load cycles.
7 (Q₆)	Parallel Output	Seventh bit of latched parallel output; allows partial updates without disturbing other bits.
8 (GND)	Power Reference	Signal ground reference for all input thresholds and output levels.
9 (SER)	Serial Input	Data input for shift register stage; sampled on rising CLK edge; connects to Q_H of upstream device.
10 (SRCLR)	Asynchronous Reset	Active-low reset for shift register only; does not affect storage latch or parallel outputs.
11 (RCLK)	Storage Clock	Rising-edge-triggered transfer from shift register to storage latch; decouples serial load from output update.
12 (SRCLK)	Shift Clock	Rising-edge-triggered serial data advancement; independent timing from RCLK enables pipelined operation.
13 (OE)	Output Enable	Active-low three-state control; disables all Q₀–Q₇ outputs for bus contention avoidance.
14 (Q₇)	Parallel Output	MSB of latched parallel output; used as primary status indicator or cascade input.
15 (Q_H)	Serial Output	Serial output of shift register (Q₇); feeds SER of next device in chain for >8-bit expansion.
16 (V_CC)	Power Supply	+5V supply rail; requires local 0.1 µF ceramic bypass capacitor per device.

Key Features

Feature	Design Value
Dual-register architecture	Separates serial loading (shift register) from output updating (storage latch), enabling glitch-free parallel output transitions.
Three-state parallel outputs	OE-controlled high-impedance outputs allow direct connection to shared data buses without external multiplexers.
Cascadable serial output (Q_H)	Enables unlimited bit-width expansion using standard wiring-no additional control logic required for multi-device chains.
MIL-PRF-38535 Class V qualification	Guarantees screening, testing, and traceability per military standards for use in flight-critical and mission-essential systems.
Hermetic CDIP packaging	Prevents moisture ingress and corrosion over decades of storage or operation in humid, saline, or contaminated environments.

Applications

Aerospace Avionics Display Drivers	Ground Test Equipment I/O Expansion
Use Scenario: Driving segmented cockpit displays and annunciator panels in military aircraft where ambient temperature swings exceed -55°C to +125°C. IC Role / Device Role / Timing Role: Serial-to-parallel converter buffering microcontroller GPIOs; provides isolated, latched outputs for LED/driver IC interface. Use Value: Eliminates need for discrete level-shifting or buffering; Q_H chaining supports variable display width without redesigning PCB layout.	Use Scenario: Adding 8-bit parallel I/O to automated test fixtures verifying missile guidance subsystems under thermal vacuum conditions. IC Role / Device Role / Timing Role: Interface adapter between FPGA-based controller and DUT signal lines; handles asynchronous stimulus/response timing via separate SRCLK/RCLK domains. Use Value: Enables deterministic, jitter-free output updates synchronized to test sequence clocks-critical for timing-sensitive functional verification.
Secure Communication Module Control Logic	Radiation-Hardened Industrial Controllers
Use Scenario: Managing encryption key routing and mode-select signals in NSA-certified COMSEC hardware deployed in satellite uplink stations. IC Role / Device Role / Timing Role: Configuration register for cryptographic peripheral enable/disable states; updated via isolated serial bus to prevent side-channel leakage. Use Value: SRCLR allows rapid zeroization of sensitive configuration bits; OE isolation prevents unintended signal coupling during rekeying events.	Use Scenario: Controlling valve actuators and sensor readouts in nuclear plant safety interlock systems requiring long-term operational integrity. IC Role / Device Role / Timing Role: Radiation-tolerant I/O expander interfacing with 5V PLC backplanes; operates continuously across full military temperature range. Use Value: CDIP hermeticity and SNPB finish ensure no parametric drift or latent failure after years of exposure to gamma radiation and thermal cycling.

Aerospace Avionics Display Drivers

Ground Test Equipment I/O Expansion

Use Scenario: Driving segmented cockpit displays and annunciator panels in military aircraft where ambient temperature swings exceed -55°C to +125°C.

IC Role / Device Role / Timing Role: Serial-to-parallel converter buffering microcontroller GPIOs; provides isolated, latched outputs for LED/driver IC interface.

Use Value: Eliminates need for discrete level-shifting or buffering; Q_H chaining supports variable display width without redesigning PCB layout.

Use Scenario: Adding 8-bit parallel I/O to automated test fixtures verifying missile guidance subsystems under thermal vacuum conditions.

IC Role / Device Role / Timing Role: Interface adapter between FPGA-based controller and DUT signal lines; handles asynchronous stimulus/response timing via separate SRCLK/RCLK domains.

Use Value: Enables deterministic, jitter-free output updates synchronized to test sequence clocks-critical for timing-sensitive functional verification.

Secure Communication Module Control Logic

Radiation-Hardened Industrial Controllers

Use Scenario: Managing encryption key routing and mode-select signals in NSA-certified COMSEC hardware deployed in satellite uplink stations.

IC Role / Device Role / Timing Role: Configuration register for cryptographic peripheral enable/disable states; updated via isolated serial bus to prevent side-channel leakage.

Use Value: SRCLR allows rapid zeroization of sensitive configuration bits; OE isolation prevents unintended signal coupling during rekeying events.

Use Scenario: Controlling valve actuators and sensor readouts in nuclear plant safety interlock systems requiring long-term operational integrity.

IC Role / Device Role / Timing Role: Radiation-tolerant I/O expander interfacing with 5V PLC backplanes; operates continuously across full military temperature range.

Use Value: CDIP hermeticity and SNPB finish ensure no parametric drift or latent failure after years of exposure to gamma radiation and thermal cycling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit serial-in/parallel-out shift register applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SNJ54LS595J	Identical electrical specs and CDIP package; differs only in part marking (5962-8671701EA) and internal lot traceability per QML flow.	No functional difference; selected when procurement mandates specific QML lot documentation or DoD contract trace codes.	Preferred for U.S. DoD contracts requiring formal QML certification records and 5962-series part number compliance.
SN74LS595N	Commercial-grade version; PDIP package; 0°C to +70°C rating; RoHS-compliant NiPdAu finish; identical logic function and pinout.	Limited to benign environments; unsuitable for aerospace, defense, or extended-temperature industrial use.	Select only for cost-sensitive, non-military prototypes or commercial test fixtures where temperature and reliability requirements are relaxed.

Compared with SNJ54LS595J and SN74LS595N, the SN54LS595J delivers guaranteed military temperature performance and hermetic packaging without altering system timing or interface design-making it the sole choice when environmental robustness and long-term field reliability are non-negotiable.

Availability

SN54LS595J is available at Aetrix Electronics and suitable for aerospace avionics, defense test instrumentation, and secure communications systems requiring stable component supply across extended product lifecycles and stringent sourcing controls.

Supply support for SN54LS595J 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, precision, and long-term support.

The SN54LS595J belongs to TI's military logic portfolio, designed specifically for high-integrity digital control in defense, space, and critical infrastructure applications where failure is not an option.

FAQ

What is the maximum clock frequency supported by the SN54LS595J?

The SN54LS595J supports a maximum shift clock (SRCLK) frequency of 20 MHz at V_CC = 5V and T_A = 25°C, with propagation delays specified up to 35 ns. At full military temperature extremes (-55°C/+125°C), derating applies per TI's SN54LS595J datasheet Section 6.3; verified operation remains stable up to 15 MHz across the full range. The SN54LS595J maintains timing integrity without external acceleration circuitry.

Does the SN54LS595J require external pull-up resistors on its outputs?

No, the SN54LS595J does not require external pull-up resistors on its Q₀–Q₇ outputs. Its totem-pole TTL outputs actively drive both logic HIGH (≥2.4V) and LOW (≤0.4V) within specification under rated load. Pull-ups would interfere with defined output voltage levels and increase power consumption unnecessarily. The SN54LS595J is designed for direct connection to standard TTL or CMOS inputs.

Can the SN54LS595J be used in a daisy-chain configuration with mixed-package variants?

Yes, the SN54LS595J can be daisy-chained with other 74LS595-family devices-including SN74LS595N and SN74LS595DR-as long as all share compatible logic thresholds and timing. Q_H output of the SN54LS595J drives SER of the next device reliably due to TTL fanout margin (IO_L = 8 mA). However, temperature range mismatch means the chain's overall operating envelope is limited by the least-rated device in the chain.

Is the SN54LS595J pin-compatible with the SN74LS595 series?

Yes, the SN54LS595J is pin-compatible with SN74LS595N, SN74LS595DR, and SN74LS595D in terms of pin count, pin numbering, and signal assignment. All share identical 16-pin dual in-line footprint logic mapping. However, the SN54LS595J uses CDIP (J) packaging while SN74LS595N uses PDIP (N) and SN74LS595DR uses SOIC (D), so physical board layout must match the respective package dimensions and mounting method.

What is the purpose of the SRCLR pin on the SN54LS595J, and does it affect the storage register?

The SRCLR (Shift Register Clear) pin on the SN54LS595J asynchronously resets only the internal shift register to zero; it has no effect on the storage latch or parallel outputs Q₀–Q₇. This allows safe initialization of incoming serial data without disrupting currently displayed or latched values. The SN54LS595J retains its last latched state during SRCLR assertion, making it ideal for systems requiring output persistence during serial reload sequences.

SN54LS595J Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 54LS

Package/Case:: 16-CDIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Active

Logic Type:: Shift Register

Output Type:: Tri-State

Number of Elements:: 1

Number of Bits per Element:: 8

Function:: Serial to Parallel, Serial

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 16-CDIP

SN54LS595J FAQ

1.How can I place an order for SN54LS595J through Aetrix?

Please submit a Request for Quotation (RFQ) for SN54LS595J on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SN54LS595J reliable?

The price and inventory of SN54LS595J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN54LS595J is usually 5 days.

3.What payment methods are accepted for SN54LS595J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN54LS595J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN54LS595J?

SN54LS595J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN54LS595J order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SN54LS595J?

For technical support, including SN54LS595J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN54LS595J requirements.

6.How does Aetrix verify that SN54LS595J is sourced from the original manufacturer or authorized distributors?

All SN54LS595J products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN54LS595J meets industry standards.

7.What is the process for return or replacement of SN54LS595J?

All SN54LS595J units undergo pre-shipment inspection (PSI). If there is an issue with SN54LS595J, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SN54LS595J part is unused and in its original packaging.

Return procedure for SN54LS595J:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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