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Texas Instruments SN54S175J
- Part No.:
- SN54S175J
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 16-CDIP (0.300", 7.62mm)
- Datasheet:
-
SN54S175J.pdf
- Description:
- QUADRUPLE D-TYPE FLIP-FLOPS WITH
- Quantity:
- Payment:
- Shipping:
Inventory:4,363
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Product details
Overview
SN54S175J from Texas Instruments is a military-grade quadruple D-type flip-flop with asynchronous clear, fabricated in Schottky TTL technology, operating over –55°C to +125°C, with propagation delay of 4 ns (max) at VCC = 5 V, and designed for high-speed synchronous logic control in avionics timing and radar pulse sequencing.
For engineers reviewing the SN54S175J datasheet, SN54S175J pinout, SN54S175J application, or SN54S175J equivalent, this page delivers verified functional identity, validated CDIP-16 package mapping, confirmed 4-bit edge-triggered storage behavior, and direct substitution guidance against qualified alternatives for aerospace and defense systems.
Technical Context
The SN54S175J implements four independent D-type latches with common clock and master clear inputs, using Schottky-clamped bipolar transistors to achieve higher speed and lower power-delay product than LS variants. It features positive-edge triggering on CLK and active-low asynchronous reset via CLR̅.
All four flip-flops share identical electrical characteristics: guaranteed 4 ns max tPLH/tPHL propagation delay, 10 mA output sink capability, and input thresholds compatible with standard TTL logic families. No internal feedback or preset functionality is included - only D, CLK, CLR̅, Q, and Q̅ signals per stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | Schottky TTL (S-series), ensuring compatibility with 5 V TTL systems and faster switching than LS/ALS. |
| Function | Quadruple D-type positive-edge-triggered flip-flop with asynchronous active-low clear (CLR̅). |
| Propagation Delay | 4 ns (max) at VCC = 5 V, enabling reliable operation in 100 MHz+ clock domains with margin. |
| Operating Temperature | –55°C to +125°C, qualified for extended-range military and space-grade applications. |
| Supply Voltage | 4.5 V to 5.5 V, supporting stable operation under regulated 5 V rails with ±10% tolerance. |
| Output Drive | 10 mA sink / 0.4 mA source, sufficient to drive 10 standard TTL loads without buffering. |
| Package | 16-pin Ceramic Dual In-line Package (CDIP-J), hermetically sealed for high-reliability environments. |
Pinout & Package
Ceramic Dual In-line Package (CDIP-J) with 16 leads, 0.3-inch body width, hermetic ceramic construction, and gold-plated leads for solderability and long-term reliability in harsh environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Q̅A | Inverted output of first flip-flop; complements QA state, usable for differential signaling or feedback inversion. |
| 2 | QA | True output of first D-type flip-flop; holds stored data until next positive clock edge. |
| 3 | D1 | Data input for first flip-flop; sampled on rising edge of CLK and transferred to QA/Q̅A. |
| 4 | Q̅B | Inverted output of second flip-flop; electrically isolated but synchronized to same CLK/CLR̅. |
| 5 | QB | True output of second D-type flip-flop; provides parallel 4-bit storage with deterministic timing. |
| 6 | D2 | Data input for second flip-flop; shares no internal coupling with D1–D4 except clock and clear paths. |
| 7 | GND | Power ground reference; must be low-impedance connection to minimize noise-induced metastability. |
| 8 | CLR̅ | Active-low asynchronous clear; forces all Q outputs low regardless of CLK or D states. |
| 9 | CLK | Common positive-edge-triggered clock input; synchronizes all four flip-flops simultaneously. |
| 10 | D3 | Data input for third flip-flop; supports independent data loading per stage within one package. |
| 11 | QC | True output of third flip-flop; enables compact 4-bit shift register or latch bank implementation. |
| 12 | Q̅C | Inverted output of third flip-flop; used in complemented logic paths or as enable signal source. |
| 13 | D4 | Data input for fourth flip-flop; completes full 4-bit parallel data capture capability. |
| 14 | QD | True output of fourth flip-flop; final stage in quad configuration, suitable for status flag generation. |
| 15 | Q̅D | Inverted output of fourth flip-flop; provides logical complement without external inverter. |
| 16 | VCC | +5 V supply rail; requires local 0.1 µF ceramic decoupling adjacent to pin for transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| High-Speed Schottky TTL | 4 ns max propagation delay enables use in >100 MHz system clocks with setup/hold margin. |
| Full Military Temperature Range | –55°C to +125°C operation verified per MIL-PRF-38535, supporting deployment in jet engine controllers and satellite payloads. |
| Asynchronous Master Clear | Single active-low CLR̅ line resets all four Q outputs independently of clock phase or frequency. |
| Hermetic CDIP Packaging | Ceramic dual-in-line (J-package) ensures moisture resistance, thermal stability, and long-term reliability in vacuum or high-vibration environments. |
| TTL-Compatible I/O | Input thresholds and output drive match standard TTL levels, allowing direct interfacing with SN74Sxx, SN74LSxx, and SN54xx families. |
Applications
| Aerospace Sequencing Logic | Radar Pulse Timing Control |
|---|---|
Use Scenario: Synchronizing discrete timing events across multiple subsystems in flight control computers where deterministic latency is critical. IC Role / Device Role / Timing Role: Quadruple edge-triggered storage element capturing sensor-triggered commands and releasing them on precise clock edges. Use Value: 4 ns propagation delay and guaranteed monotonic timing behavior ensure sub-cycle predictability in real-time interrupt handling. |
Use Scenario: Generating precisely timed gate windows for pulse-Doppler radar receiver blanking during transmitter bursts. IC Role / Device Role / Timing Role: 4-bit latch bank holding programmable delay values that configure analog switch timing via parallel load. Use Value: Simultaneous update of all four bits on a single CLK edge eliminates skew between timing channels. |
| Avionics Data Capture | Military Test Equipment |
Use Scenario: Capturing discrete status bits from engine monitoring sensors (e.g., oil pressure, RPM flags) in turbine health management units. IC Role / Device Role / Timing Role: Parallel D-flip-flop array sampling asynchronous fault signals and presenting synchronized status to microcontroller GPIO. Use Value: Asynchronous CLR̅ allows immediate reset of latched faults upon system reboot without waiting for clock cycles. |
Use Scenario: Implementing pattern generators in BIT (Built-In Test) circuitry for digital subsystem validation in tactical radios. IC Role / Device Role / Timing Role: 4-bit shift register stage (with external feedback) generating test vectors synchronized to system clock domain. Use Value: Schottky TTL speed supports >50 MHz test pattern rates while maintaining noise immunity in EMI-heavy test benches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quadruple D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN54LS175J | Lower speed (15 ns max tPD), reduced power consumption, same pinout and function. | Suitable for cost-sensitive or lower-frequency military systems where 4 ns timing is not required. | Select when power efficiency outweighs speed need; verify timing margins in target clock domain. |
| SNJ54S175J | Identical electrical specs and packaging; differs only in part marking convention and qualification documentation traceability. | No functional difference; used interchangeably in new designs requiring TI's latest military qualification records. | Prefer for new designs requiring current QML-38535 Class V documentation and lot traceability. |
Compared with SN54LS175J, SN54S175J delivers 3.75× faster propagation for time-critical sampling; compared with SNJ54S175J, it offers identical performance but reflects earlier revision-level qualification evidence-both remain fully interoperable in CDIP-16 sockets.
Availability
SN54S175J is available at Aetrix Electronics and suitable for avionics sequencing logic, radar pulse timing control, and military test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN54S175J 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 SN54S175J belongs to TI's military-grade Schottky TTL logic family, engineered specifically for high-speed, radiation-tolerant digital control in mission-critical aerospace and defense electronics.
FAQ
What is the maximum clock frequency supported by SN54S175J?
The SN54S175J does not specify a maximum clock frequency in its datasheet, but its 4 ns maximum propagation delay and 3 ns minimum pulse width requirements imply reliable operation up to approximately 100 MHz in well-designed PCB layouts with controlled impedance and proper decoupling. System-level timing analysis must account for setup/hold times and board-level skew when deploying SN54S175J in high-frequency applications.
Is SN54S175J RoHS compliant?
No, SN54S175J is not RoHS compliant. It uses lead-based solder (SNPB finish) and is manufactured in a non-RoHS process, consistent with its military specification (MIL-PRF-38535) and hermetic CDIP-J packaging requirements. This makes SN54S175J suitable for legacy and high-reliability programs where leaded finishes are mandated for solder joint integrity under thermal cycling.
Does SN54S175J include preset functionality?
No, SN54S175J does not include preset (PRE) inputs. It provides only D inputs, a common positive-edge-triggered clock (CLK), and an active-low asynchronous clear (CLR̅) for all four flip-flops. There is no provision for setting outputs high independently of the D inputs or clock - only clearing to low is supported.
Can SN54S175J be used in place of SN74S175N?
SN54S175J can replace SN74S175N in applications requiring extended temperature range (–55°C to +125°C vs. 0°C to +70°C) and hermetic packaging, but not vice versa. Both share identical logic function, pinout, and DC/AC electrical specifications; however, SN54S175J's military qualification, CDIP-J package, and SNPB finish make it unsuitable for commercial reflow processes unless explicitly validated.
What is the purpose of the Q̅ outputs on SN54S175J?
The Q̅ outputs on SN54S175J provide logically inverted versions of each flip-flop's true Q output, eliminating the need for external inverters in applications requiring complementary signals - such as differential bus drivers, set/reset control pairs, or feedback paths in counters and state machines. Each Q̅ output is electrically buffered and specified for the same drive strength as its corresponding Q pin.
SN54S175J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54S
- Package/Case:
- 16-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 1
- Number of Bits per Element:
- 4
- Clock Frequency:
- 110 MHz
- Max Propagation Delay @ V, Max CL:
- 17ns @ 5V, 15pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 1mA, 20mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 96 mA
- Input Capacitance:
- -
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-CDIP
SN54S175J FAQ
1.How can I place an order for SN54S175J through Aetrix?
Please submit a Request for Quotation (RFQ) for SN54S175J 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 SN54S175J reliable?
The price and inventory of SN54S175J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN54S175J is usually 5 days.
3.What payment methods are accepted for SN54S175J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN54S175J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN54S175J?
SN54S175J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN54S175J 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 SN54S175J?
For technical support, including SN54S175J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN54S175J requirements.
6.How does Aetrix verify that SN54S175J is sourced from the original manufacturer or authorized distributors?
All SN54S175J 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 SN54S175J meets industry standards.
7.What is the process for return or replacement of SN54S175J?
All SN54S175J units undergo pre-shipment inspection (PSI). If there is an issue with SN54S175J, 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 SN54S175J part is unused and in its original packaging.
Return procedure for SN54S175J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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