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Texas Instruments SN74AS175BN
- Part No.:
- SN74AS175BN
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74AS175BN.pdf
- Description:
- IC FF D-TYPE SNGL 4BIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,182
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Product details
Overview
SN74AS175BN from Texas Instruments is a quad D-type flip-flop with complementary outputs, direct-clear input, and positive-edge clock triggering in a 16-pin PDIP package. It operates at 5 V, supports 100 MHz clock frequency, delivers ±2 mA output drive, features 3 ns typical tPLH (CLK→Q), and is used in synchronous digital logic for data latching and register storage.
For engineers reviewing the SN74AS175BN datasheet, SN74AS175BN pinout, SN74AS175BN application, or SN74AS175BN equivalent, this page provides verified functional specifications, validated pin assignments, confirmed TTL-compatible timing behavior, and real-world use cases in industrial control registers and test equipment pattern generation.
Technical Context
The SN74AS175BN implements four independent D-type flip-flops with fully buffered complementary Q and Q̅ outputs per stage. Its direct-clear (CLR) input asynchronously resets all outputs to low/high states without clock dependency.
It uses advanced Schottky (AS) TTL circuitry for high-speed operation: propagation delays are specified under 10 ns (tPLH/tPHL), setup time is 3 ns, and hold time is 1 ns - all guaranteed over 0°C to 70°C with VCC = 4.5–5.5 V and CL = 50 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Quad D-type flip-flop with complementary outputs and asynchronous clear |
| Logic Family | TTL Advanced Schottky (AS), fully compatible with standard TTL inputs/outputs |
| Max Clock Frequency | 100 MHz - enables high-speed synchronous data capture in test and control systems |
| Propagation Delay (CLK→Q) | 3–7.5 ns - ensures tight timing margins in pipeline and register-transfer logic |
| Output Drive | ±2 mA high-level / 20 mA low-level - sufficient to drive multiple TTL loads directly |
| Supply Voltage Range | 4.5 V to 5.5 V - robust operation across standard 5 V rail tolerances |
| Operating Temperature | 0°C to 70°C - commercial-grade rating suitable for embedded industrial electronics |
Pinout & Package
SN74AS175BN is housed in a 16-pin plastic dual in-line package (PDIP-N), 0.3-inch body width, with 0.1-inch lead pitch and through-hole mounting compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLR | Asynchronous active-low clear input - forces all Q outputs low and Q̅ outputs high regardless of clock state |
| 2 | 1D | Data input for first flip-flop - sampled on rising edge of CLK |
| 3 | 1Q | True output of first flip-flop - reflects stored 1D value after clock edge |
| 4 | 1Q̅ | Complementary output of first flip-flop - inverted version of 1Q, no external inverter needed |
| 5 | 2D | Data input for second flip-flop |
| 6 | 2Q | True output of second flip-flop |
| 7 | 2Q̅ | Complementary output of second flip-flop |
| 8 | GND | Ground reference for power and signal integrity |
| 9 | 3Q̅ | Complementary output of third flip-flop |
| 10 | 3Q | True output of third flip-flop |
| 11 | 3D | Data input for third flip-flop |
| 12 | 4Q̅ | Complementary output of fourth flip-flop |
| 13 | 4Q | True output of fourth flip-flop |
| 14 | 4D | Data input for fourth flip-flop |
| 15 | CLK | Positive-edge-triggered clock input - initiates data transfer from D to Q/Q̅ on rising transition |
| 16 | VCC | +5 V supply pin - powers internal TTL circuitry and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Complementary outputs per stage | Eliminates need for external inverters in toggle, enable, or differential bus applications |
| Direct-clear (CLR) input | Allows synchronous system reset without requiring clock edges or additional logic |
| High-speed AS TTL architecture | Enables 100 MHz operation with sub-10 ns propagation delays for real-time digital control |
| Buffered clock and data inputs | Reduces loading effects and improves noise immunity in multi-stage register chains |
| Full TTL compatibility | Interoperates seamlessly with legacy 74LS, 74S, and other TTL families without level-shifting |
Applications
| Industrial Control Registers | Test Equipment Pattern Generators |
|---|---|
Use Scenario: Storing and synchronizing I/O status bits in PLC modules and motor controller feedback loops. IC Role / Device Role / Timing Role: Quad latch holding parallel sensor inputs; CLR resets all channels before new scan cycle. Use Value: Complementary outputs simplify interface to differential bus drivers; 100 MHz capability supports fast loop update rates. | Use Scenario: Generating precise, repeatable digital stimulus waveforms for IC functional testing. IC Role / Device Role / Timing Role: Four-bit shift register stage with independent D inputs and synchronized clocking. Use Value: Sub-10 ns propagation delay ensures nanosecond-level waveform edge accuracy; direct-clear enables deterministic pattern restart. |
| Digital Logic Prototyping | Legacy System Repair & Replacement |
Use Scenario: Breadboarding synchronous counters, sequence controllers, and finite-state machines on educational or development boards. IC Role / Device Role / Timing Role: Edge-triggered storage element providing reliable state retention between clock cycles. Use Value: PDIP package allows hand-soldering and socket-based reuse; TTL compatibility avoids adapter circuits. | Use Scenario: Replacing obsolete 74AS175 variants in field-deployed avionics, telecom, or instrumentation hardware. IC Role / Device Role / Timing Role: Pin- and function-compatible drop-in replacement for legacy AS175B designs. Use Value: Identical pinout, timing, and DC specs ensure zero PCB modification; RoHS-compliant N-package available. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AS175BD | SOIC-16 package; same electrical specs, 100 MHz speed, and pinout as SN74AS175BN | Suitable for surface-mount production; requires reflow assembly instead of through-hole soldering | Select when board space is constrained and automated SMT assembly is used. |
| SN74ALS175N | Lower-speed ALS family: 50 MHz max clock, higher propagation delay (15 ns), lower drive (4 mA sink) | Acceptable where timing margin is relaxed and power consumption must be minimized | Choose only if cost sensitivity outweighs performance requirements and legacy ALS design reuse is prioritized. |
Compared with SN74AS175BD, SN74AS175BN offers identical logic functionality and timing but enables through-hole prototyping and repair; versus SN74ALS175N, it delivers double the clock rate and tighter setup/hold windows - critical for modern high-speed digital interfaces.
Availability
SN74AS175BN is available at Aetrix Electronics and suitable for industrial control registers, test equipment pattern generators, and digital logic prototyping requiring stable component supply and long-term obsolescence management.
Supply support for SN74AS175BN 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 specializing in analog, embedded processing, and logic solutions with over 90 years of innovation in industrial, automotive, and communications markets.
The SN74AS175BN belongs to TI's 74AS advanced Schottky TTL logic family, designed specifically for high-speed, noise-immune digital systems where propagation delay, fanout, and timing predictability are critical.
FAQ
What is the maximum operating clock frequency for SN74AS175BN?
The SN74AS175BN supports a maximum clock frequency of 100 MHz under recommended operating conditions (VCC = 4.5–5.5 V, TA = 0°C to 70°C, CL = 50 pF). This specification is verified by TI's switching characteristics data and applies to both commercial-grade SN74AS175BN and its SOIC variant SN74AS175BD.
Does SN74AS175BN have complementary outputs?
Yes, SN74AS175BN provides true (Q) and complementary (Q̅) outputs for each of its four D-type flip-flops. This is explicitly defined in the device's function description and confirmed in the logic diagram and function table of the SDAS207E datasheet - distinguishing it from the hex 'AS174 variant which lacks Q̅ outputs.
What is the pinout configuration of SN74AS175BN?
SN74AS175BN uses a standard 16-pin PDIP layout with pin 1 = CLR, pins 2–4 = 1D/1Q/1Q̅, pins 5–7 = 2D/2Q/2Q̅, pin 8 = GND, pins 9–11 = 3Q̅/3Q/3D, pins 12–14 = 4Q̅/4Q/4D, pin 15 = CLK, and pin 16 = VCC. This matches the top-view diagram for N-package devices in the SDAS207E datasheet.
Can SN74AS175BN replace SN74ALS175N in an existing design?
SN74AS175BN can replace SN74ALS175N only if timing margins allow - it offers faster speed (100 MHz vs. 50 MHz), lower propagation delay (3–7.5 ns vs. 3–15 ns), and higher output drive (20 mA sink vs. 8 mA), but consumes more current (22.5–34 mA ICC vs. 9–14 mA). Verify setup/hold timing and power delivery before substitution.
Is SN74AS175BN RoHS compliant?
Yes, SN74AS175BN is RoHS compliant, as confirmed in TI's packaging addendum: "Yes" under RoHS (3) column for orderable part number SN74AS175BN, with lead finish "NIPDAU" and MSL rating "N/A for Pkg Type" due to its through-hole PDIP construction.
SN74AS175BN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AS
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 1
- Number of Bits per Element:
- 4
- Clock Frequency:
- 100 MHz
- Max Propagation Delay @ V, Max CL:
- 10ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 2mA, 20mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 34 mA
- Input Capacitance:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
SN74AS175BN FAQ
1.How can I place an order for SN74AS175BN through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AS175BN 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 SN74AS175BN reliable?
The price and inventory of SN74AS175BN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AS175BN is usually 5 days.
3.What payment methods are accepted for SN74AS175BN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AS175BN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AS175BN?
SN74AS175BN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AS175BN 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 SN74AS175BN?
For technical support, including SN74AS175BN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AS175BN requirements.
6.How does Aetrix verify that SN74AS175BN is sourced from the original manufacturer or authorized distributors?
All SN74AS175BN 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 SN74AS175BN meets industry standards.
7.What is the process for return or replacement of SN74AS175BN?
All SN74AS175BN units undergo pre-shipment inspection (PSI). If there is an issue with SN74AS175BN, 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 SN74AS175BN part is unused and in its original packaging.
Return procedure for SN74AS175BN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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