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onsemi 74LVX174M
- Part No.:
- 74LVX174M
- Manufacturer:
- onsemi
- Category:
- Flip Flops
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74LVX174M.pdf
- Description:
- IC FF D-TYPE SNGL 6BIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,558
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Product details
Overview
74LVX174M from Fairchild Semiconductor is a low-voltage, hex D-type flip-flop with master reset, designed as a 6-bit edge-triggered storage register. It operates from 2.0V to 3.6V, features simultaneous asynchronous reset (MR), and transfers data on the LOW-to-HIGH clock transition. Used in digital control logic, state machines, and data latching for industrial microcontroller interfaces.
For engineers reviewing the 74LVX174M datasheet, pinout, applications, or equivalent options, key selection criteria include its 3.3V-compatible input voltage translation (0–5.5V inputs), guaranteed tPLH/tPHL ≤ 11.5 ns at 3.3V, master reset synchronization, and SOIC-16 package compatibility with legacy 74-series board layouts.
Technical Context
The 74LVX174M implements six independent positive-edge-triggered D flip-flops sharing a common clock (CP) and active-low master reset (MR). All outputs (Q0–Q5) update synchronously on the rising edge of CP when MR is HIGH; all outputs force LOW when MR is LOW, regardless of CP state.
It supports mixed-voltage interfacing: inputs tolerate up to 5.5V while operating from a 2.0–3.6V VCC rail, enabling direct connection to 5V logic without level shifters. Its noise immunity is characterized by specified VOLP/VOLV (±0.5V dynamic output swing) and VIHD/VILD (2.0V/0.8V dynamic input thresholds) at 3.3V with 50 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0V to 3.6V - Enables operation in 3.3V systems with margin for supply variation. |
| Input Voltage Range | 0V to 5.5V - Allows direct interfacing with 5V TTL/CMOS logic without external level shifters. |
| tPLH / tPHL (max) | 11.5 ns at VCC = 3.3V, CL = 15 pF - Supports >85 MHz reliable operation in synchronous control paths. |
| fMAX | 115 MHz typical at 3.3V - Sufficient for high-speed register staging in FPGA I/O bridging or microcontroller peripheral buffering. |
| ICC (max) | 40 µA at VCC = 3.6V - Ultra-low static power ideal for battery-backed or always-on logic subsystems. |
| Output Drive | ±4 mA at VCC = 3.3V - Drives standard CMOS loads (10–15 pF) with clean edges and minimal overshoot. |
| Operating Temp | −40°C to +85°C - Qualified for industrial temperature environments without derating. |
Pinout & Package
74LVX174M is housed in a 16-lead Small Outline Integrated Circuit (SOIC) package per JEDEC MS-012, 0.150" narrow body (Package Number M16A), with standard 1.27 mm pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (D0) | Data Input 0 | Asynchronous data source for first flip-flop; sampled on next CP rising edge if MR is HIGH. |
| 2 (D1) | Data Input 1 | Independent data input for second flip-flop; no internal coupling to D0 or other D inputs. |
| 3 (D2) | Data Input 2 | One of six dedicated D inputs; each maps 1:1 to corresponding Q output. |
| 4 (D3) | Data Input 3 | Supports parallel 6-bit data capture; all D inputs must be stable before CP edge per tS/tH timing. |
| 5 (D4) | Data Input 4 | Valid during MR HIGH only; ignored when MR is LOW (outputs forced LOW regardless). |
| 6 (D5) | Data Input 5 | Final bit of 6-bit register; enables full byte-latch capability when used with external bus control. |
| 7 (GND) | Ground Reference | Primary return path for all I/O and internal logic; requires low-impedance PCB plane connection. |
| 8 (Q5) | Output 5 | Inverted only if external inversion applied; true-level output reflecting stored D5 value after CP edge. |
| 9 (Q4) | Output 4 | Non-inverting registered output; synchronized to CP and gated by MR status. |
| 10 (Q3) | Output 3 | Provides deterministic timing: tPLH/tPHL measured from CP edge to Qn valid transition. |
| 11 (Q2) | Output 2 | Shares same propagation delay spec as Q0–Q5; output-to-output skew ≤1.5 ns ensures tight timing alignment. |
| 12 (Q1) | Output 1 | Used for feedback or status monitoring; output loading affects tPLH/tPHL per CL specification. |
| 13 (Q0) | Output 0 | First bit of 6-bit latch; matches D0 after one CP cycle (when MR = HIGH). |
| 14 (CP) | Clock Pulse Input | Positive-edge sensitive; internal Schmitt trigger not present - requires monotonic rise/fall per ∆t/∆V spec. |
| 15 (MR) | Master Reset Input | Active-LOW asynchronous reset; forces all Qn = LOW immediately, overriding CP and D inputs. |
| 16 (VCC) | Supply Voltage | Must be decoupled locally with 0.1 µF ceramic capacitor; ripple < 50 mV peak-to-peak required for noise margin. |
Key Features
| Feature | Design Value |
|---|---|
| Input voltage translation | Accepts 0–5.5V inputs while powered from 2.0–3.6V VCC - eliminates external level shifters in mixed-voltage systems. |
| Simultaneous master reset | Single MR pin asynchronously clears all six Q outputs to LOW - simplifies system initialization and fault recovery. |
| Low dynamic noise | Guaranteed VOLP/VOLV (±0.5V) and VIHD/VILD (2.0V/0.8V) at 3.3V/50 pF - ensures robust noise immunity in dense PCB layouts. |
| High-speed 3.3V operation | fMAX = 115 MHz typical, tPLH/tPHL ≤ 11.5 ns - meets timing closure for fast control-state sequencing in PLC modules. |
| Industrial temperature range | Specified from −40°C to +85°C - supports deployment in uncontrolled enclosures, motor drives, and remote sensors. |
Applications
| Programmable Logic Controller (PLC) I/O Expansion | Microcontroller GPIO Extender |
|---|---|
Use Scenario: Latching 6-bit parallel sensor status (e.g., limit switches, proximity sensors) before microcontroller read cycle. IC Role / Device Role / Timing Role: Edge-triggered storage register synchronizing asynchronous field inputs to the MCU's clock domain. Use Value: Eliminates metastability risk via controlled CP edge sampling and provides atomic MR-based clearing before new scan cycle. | Use Scenario: Expanding limited GPIO count on an ARM Cortex-M0+ MCU to drive LED arrays and relay drivers. IC Role / Device Role / Timing Role: Parallel output latch holding steady-state drive signals while MCU computes next state. Use Value: Reduces MCU pin count pressure and enables glitch-free output updates using MR for coordinated reset across all channels. |
| Digital Panel Meter Interface | Industrial Serial-to-Parallel Converter |
Use Scenario: Capturing 6-bit BCD or binary-coded display data from a serial UART interface for 7-segment driver ICs. IC Role / Device Role / Timing Role: Synchronizing burst-mode serial data into parallel format aligned to local display refresh clock. Use Value: Provides setup/hold margin (tS = 6.0 ns, tH = 0 ns at 3.3V) for reliable capture from UART shift registers or SPI deserializers. | Use Scenario: Converting RS-485 Modbus RTU payload bytes into parallel control bits for HVAC actuator banks. IC Role / Device Role / Timing Role: Temporary storage buffer between half-duplex serial receiver and parallel output stage. Use Value: Enables MR-driven zeroing of all outputs prior to loading new command byte - prevents spurious actuation during data transfer. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex D-type flip-flop with master reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC174APWR | 3.3V-only inputs (0–3.6V), no 5V-tolerant inputs; slightly faster tPLH (7.5 ns typ); same SOIC-16 footprint. | Requires external level shifting for 5V signal sources; better suited for pure 3.3V systems with tighter timing budgets. | Select when system uses only 3.3V logic and needs marginal speed improvement; avoid if interfacing legacy 5V peripherals. |
| 74AHC174PW | Wider VCC range (2.0–5.5V); 5V-tolerant inputs only when VCC = 5V; higher ICC (100 µA max); TSSOP-16 package only. | Not pin-compatible with 74LVX174M SOIC layout; requires PCB redesign; supports direct 5V operation but lacks 3.3V-input-with-5V-sources capability. | Choose for 5V-native designs needing higher drive strength; not drop-in for existing 74LVX174M SOIC footprints. |
Compared with SN74LVC174APWR and 74AHC174PW, the 74LVX174M uniquely combines 5V-tolerant inputs with 3.3V supply operation and SOIC-16 packaging - making it optimal for retrofitting 5V legacy systems onto modern low-voltage rails without layout changes.
Availability
74LVX174M is available at Aetrix Electronics and suitable for programmable logic controller (PLC) I/O expansion, microcontroller GPIO extension, and industrial serial-to-parallel conversion requiring stable component supply and long-term industrial lifecycle support.
Supply support for 74LVX174M 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in analog and discrete power products, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial systems.
The LVX logic family - including the 74LVX174M - was engineered for low-voltage, high-noise-immunity operation in mixed-signal industrial control, targeting seamless integration between 5V legacy peripherals and emerging 3.3V microcontrollers.
FAQ
What is the maximum clock frequency supported by the 74LVX174M?
The 74LVX174M supports a maximum clock frequency of 115 MHz typical and 95 MHz minimum over the full −40°C to +85°C temperature range at VCC = 3.3V ± 0.3V. This is derived from AC Electrical Characteristics table values for fMAX under recommended operating conditions, validated with 15 pF load. The 74LVX174M achieves this performance while maintaining guaranteed setup/hold and propagation delay margins essential for reliable state machine operation.
Does the 74LVX174M support 5V logic inputs while operating from a 3.3V supply?
Yes, the 74LVX174M supports input voltages from 0V to 5.5V independent of VCC, which can be as low as 2.0V. This 5V-tolerant input capability is explicitly specified in the Recommended Operating Conditions table and enables direct connection to 5V TTL or CMOS outputs without level-shifting circuitry. The 74LVX174M maintains correct logic interpretation and noise margins across this range when VCC is set to 3.3V.
What is the function of the Master Reset (MR) pin on the 74LVX174M?
The MR pin on the 74LVX174M is an active-LOW asynchronous reset that forces all six Q outputs (Q0–Q5) to LOW regardless of clock or data input states. Its removal time (tREC = 3.0 ns min at 3.3V) ensures rapid, deterministic clearing of the register. Unlike clock-synchronous resets, MR overrides all internal timing - making the 74LVX174M suitable for fail-safe initialization and emergency shutdown sequences in industrial control hardware.
Is the 74LVX174M pin-compatible with standard 74LS174 or 74HC174 devices?
The 74LVX174M shares identical pinout (D0–D5, CP, MR, Q0–Q5, VCC, GND) and SOIC-16 package (M16A) with 74LS174 and 74HC174, but voltage and timing behavior differ significantly. While physical replacement is possible, the 74LVX174M requires 2.0–3.6V VCC and offers 5V-tolerant inputs - unlike 74LS174 (5V-only) or 74HC174 (3–6V with no 5V tolerance). System validation is required before substitution.
What decoupling capacitance is recommended for stable operation of the 74LVX174M?
A minimum 0.1 µF ceramic capacitor placed as close as possible to the 74LVX174M VCC and GND pins is required for stable operation. This mitigates switching noise and maintains supply integrity during simultaneous output transitions. For systems with high di/dt or multiple 74LVX174M devices, adding a bulk 4.7 µF tantalum or aluminum electrolytic capacitor nearby further suppresses low-frequency ripple. The 74LVX174M's low ICC (40 µA max) reduces average current demand but does not eliminate need for local high-frequency decoupling.
74LVX174M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LVX
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 6
- Clock Frequency:
- 95 MHz
- Max Propagation Delay @ V, Max CL:
- 12.8ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 4mA
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
74LVX174M FAQ
1.How can I place an order for 74LVX174M through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVX174M 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 74LVX174M reliable?
The price and inventory of 74LVX174M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX174M is usually 5 days.
3.What payment methods are accepted for 74LVX174M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX174M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVX174M?
74LVX174M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVX174M 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 74LVX174M?
For technical support, including 74LVX174M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX174M requirements.
6.How does Aetrix verify that 74LVX174M is sourced from the original manufacturer or authorized distributors?
All 74LVX174M 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 74LVX174M meets industry standards.
7.What is the process for return or replacement of 74LVX174M?
All 74LVX174M units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX174M, 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 74LVX174M part is unused and in its original packaging.
Return procedure for 74LVX174M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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