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Nexperia USA Inc. 74HCT74PW,118
- Part No.:
- 74HCT74PW,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HCT74PW,118.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,461
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Product details
Overview
74HCT74PW,118 from Nexperia is a dual positive-edge-triggered D-type flip-flop with independent asynchronous set (nSD) and reset (nRD) inputs, complementary Q/nQ outputs per section, TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), 14-lead TSSOP package (SOT402-1), and operation over -40 °C to +125 °C. It functions as a synchronous storage element in digital control logic, clock domain synchronization, and state machine sequencing.
For engineers reviewing the 74HCT74PW,118 datasheet, 74HCT74PW,118 pinout, 74HCT74PW,118 application, or 74HCT74PW,118 equivalent, this device is selected for edge-triggered data latching in industrial PLC I/O modules, automotive body control units requiring TTL-level compatibility, and low-power embedded sequencers where propagation delay (tpd = 18 ns typ at VCC = 4.5 V, CL = 50 pF) and rail-to-rail output swing are critical.
Technical Context
The 74HCT74PW,118 implements two independent D-type flip-flops sharing no internal coupling-each with dedicated nD, nCP, nSD, nRD, nQ, and nQ terminals. Its TTL-compatible inputs accept standard 5 V logic levels while operating from a 4.5 V to 5.5 V supply, enabling direct interfacing with legacy microcontrollers and bus drivers without level translation.
Schmitt-trigger action on the clock input (nCP) ensures robust triggering under slow-rising or noisy clock edges, and internal clamp diodes allow safe interface to voltages exceeding VCC when used with current-limiting resistors-critical in mixed-voltage system backplane designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL systems and stable operation across industrial temperature range. |
| Propagation Delay (tpd) | 18 ns typical (VCC = 4.5 V, CL = 50 pF) - Enables reliable operation up to 22 MHz maximum clock frequency in synchronous logic chains. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - Guarantees unambiguous recognition of TTL logic levels without external biasing. |
| Output Drive | ±4 mA (VOH/VOL at VCC = 4.5 V) - Sufficient to drive 10 LS-TTL loads or directly interface with 74ALVC/74LVC series inputs. |
| Operating Temperature | -40 °C to +125 °C - Qualified for under-hood automotive ECUs and industrial motor drives with extended thermal cycling. |
| Power Dissipation | 80 μA ICC max (VCC = 5.5 V, static) - Supports low-quiescent-current battery-backed control circuits and sleep-mode retention. |
| ESD Robustness | HBM > 2000 V, CDM > 1000 V - Reduces risk of field failure during automated PCB assembly and handling in high-volume manufacturing. |
Pinout & Package
TSSOP14 plastic thin shrink small outline package (SOT402-1); 14 leads; body width 4.4 mm; 0.65 mm lead pitch; exposed pad not present; RoHS-compliant; moisture sensitivity level MSL3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (1RD) | Asynchronous reset (active LOW) | Forces nQ = LOW regardless of clock or data; overrides all other inputs for immediate state clearing. |
| 2 (1D) | Data input (flip-flop 1) | Samples and stores logic level on rising edge of 1CP; requires 15 ns setup and 3 ns hold time at VCC = 4.5 V. |
| 3 (1CP) | Clock input (flip-flop 1) | Positive-edge-triggered; Schmitt-triggered for noise immunity; minimum pulse width 23 ns HIGH, 20 ns LOW. |
| 4 (1SD) | Asynchronous set (active LOW) | Forces nQ = HIGH regardless of clock or data; provides priority override for known initial state. |
| 5 (1Q) | True output (flip-flop 1) | Reflects stored data after clock edge; complements 1Q; drives CMOS/TTL loads with symmetrical rise/fall times. |
| 6 (1Q) | Complement output (flip-flop 1) | Inverted version of 1Q; enables direct implementation of toggle or JK-like behavior without external gates. |
| 7 (GND) | Ground reference | Primary return path for all internal logic and output currents; must be low-impedance for stable timing margins. |
| 8 (2Q) | Complement output (flip-flop 2) | Matches 1Q functionality for second section; allows independent dual-channel storage in single package. |
| 9 (2Q) | True output (flip-flop 2) | Independent of first section; supports parallel data capture or dual-phase clock division applications. |
| 10 (2SD) | Asynchronous set (flip-flop 2) | Set control isolated from flip-flop 1; enables selective initialization of one channel without affecting the other. |
| 11 (2CP) | Clock input (flip-flop 2) | Electrically identical to 1CP; permits independent clocking of each section using separate timing sources. |
| 12 (2D) | Data input (flip-flop 2) | Functionally identical to 1D; supports dual-data-path architectures such as dual-edge sampling or mirrored registers. |
| 13 (2RD) | Asynchronous reset (flip-flop 2) | Independent reset for second section; essential for fault recovery in redundant control subsystems. |
| 14 (VCC) | Supply voltage | Must be decoupled with 100 nF ceramic capacitor near pin; regulates internal bias and output driver strength. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input levels | Enables plug-in replacement of legacy 74LS74 without redesigning input conditioning networks or pull-ups. |
| Schmitt-trigger clock input | Accepts clock rise/fall times up to 120 ns (VCC = 2.0 V) without metastability-ideal for RC-generated clocks or noisy environments. |
| Asynchronous set/reset per section | Allows independent initialization or forced state control of each flip-flop-critical for safety-critical watchdog or fail-safe logic. |
| Symmetrical output impedance | Ensures matched rise/fall times (tt = 7 ns typ) and eliminates duty-cycle distortion in clock-dividing configurations. |
| High noise immunity | CMOS input structure with 400 mV typical noise margin at VCC = 5 V reduces susceptibility to crosstalk in dense PCB layouts. |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Latching sensor status (door open/closed, seatbelt fastened) before CAN message transmission. IC Role / Device Role / Timing Role: Dual-channel edge-triggered register capturing asynchronous mechanical switch events synchronized to MCU polling clock. Use Value: Eliminates need for external debounce circuitry by leveraging asynchronous set/reset for immediate state capture and clean clock-domain transfer. |
Use Scenario: Controlling headlight dimming sequence and mirror fold/unfold timing via PWM-modulated outputs. IC Role / Device Role / Timing Role: State-holding element in finite-state machine driving relay drivers and LED current sinks. Use Value: Provides deterministic, glitch-free output transitions with 18 ns tpd-ensuring precise timing alignment between lighting phases. |
| Embedded Serial-to-Parallel Converter | Test Equipment Pattern Generator |
|
Use Scenario: Converting serial configuration bits from SPI interface into parallel enable signals for analog mux banks. IC Role / Device Role / Timing Role: Dual-stage shift register stage storing two consecutive bits for parallel output staging. Use Value: Complementary Q/nQ outputs allow direct drive of active-HIGH and active-LOW control lines without inverters-reducing component count. |
Use Scenario: Generating repeatable test vectors for ASIC validation using programmable clock dividers and pattern storage. IC Role / Device Role / Timing Role: Synchronous building block in multi-stage counter/divider chain generating precise timing windows. Use Value: 22 MHz fmax and sub-20 ns propagation delay support generation of stable 5 MHz test clocks with <1 ns jitter accumulation per stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT74DR (Texas Instruments) | Same 14-pin SOIC package; identical VIH/VIL specs; 20 ns tpd typ at VCC = 4.5 V; higher ICC (160 μA max). | Preferred for through-hole prototyping or legacy board rework where SOIC footprint is fixed. | Select when existing design uses SOIC-14 and no PCB revision is permitted. |
| 74LVC74ABQ,115 (Nexperia) | 3.3 V only (1.65–3.6 V); LVCMOS inputs; 3.5 ns tpd typ; 14-terminal DHVQFN package (SOT762-1); no 5 V tolerance. | Required for modern low-voltage FPGA/CPU interfaces; incompatible with 5 V buses without level shifters. | Choose for new 3.3 V designs prioritizing speed and board space over 5 V interoperability. |
Compared with SN74HCT74DR, the 74HCT74PW,118 offers superior thermal performance in TSSOP due to lower junction-to-ambient resistance, while 74LVC74ABQ,115 delivers 5× faster switching but sacrifices 5 V system compatibility-making the 74HCT74PW,118 optimal for cost-sensitive, thermally constrained 5 V industrial controls.
Availability
74HCT74PW,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control units, embedded serial-to-parallel conversion, and test equipment pattern generation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT74PW,118 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
Nexperia is a global semiconductor expert delivering high-performance, reliable components for automotive, industrial, mobile, and consumer electronics, with leadership in logic, discrete, and MOSFET technologies.
The 74HCT74PW,118 belongs to Nexperia's 74HCT logic family-designed specifically for TTL-to-CMOS bridging in 5 V systems, emphasizing noise immunity, wide operating temperature, and drop-in compatibility with legacy bipolar logic.
FAQ
Can the 74HCT74PW,118 operate at 3.3 V?
No. The 74HCT74PW,118 is specified only for 4.5 V to 5.5 V supply operation. At 3.3 V, input thresholds (VIH = 2.0 V min) become marginal, and output drive degrades significantly-potentially causing logic misreads. For 3.3 V systems, use the 74LVC74ABQ,115 instead, which is fully characterized down to 1.65 V.
What is the purpose of the Schmitt-trigger on the clock input?
The Schmitt-trigger on nCP provides hysteresis (typically 0.5 V at VCC = 5 V), allowing reliable edge detection even with slow-rising or electrically noisy clock signals-such as those from RC oscillators or long PCB traces. This prevents multiple triggering and metastability that would occur with a standard CMOS input under similar conditions.
How does the asynchronous reset differ from the synchronous clear function?
The asynchronous reset (nRD) forces nQ LOW immediately upon signal assertion, independent of the clock edge-enabling immediate state clearing for safety or initialization. In contrast, a synchronous clear would require waiting for the next clock edge, introducing up to one full clock period of latency before the reset takes effect.
Is the TSSOP package (SOT402-1) compatible with reflow soldering?
Yes. The 74HCT74PW,118 in TSSOP14 (SOT402-1) is qualified for standard lead-free reflow profiles (J-STD-020, MSL3). Peak temperature must not exceed 260 °C, and time above 217 °C must be limited to 60–150 seconds. Proper thermal profiling is required to avoid solder bridging on the 0.65 mm pitch leads.
74HCT74PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 59 MHz
- Max Propagation Delay @ V, Max CL:
- 44ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 4mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 40 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
74HCT74PW,118 FAQ
1.How can I place an order for 74HCT74PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT74PW,118 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 74HCT74PW,118 reliable?
The price and inventory of 74HCT74PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT74PW,118 is usually 5 days.
3.What payment methods are accepted for 74HCT74PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT74PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT74PW,118?
74HCT74PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT74PW,118 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 74HCT74PW,118?
For technical support, including 74HCT74PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT74PW,118 requirements.
6.How does Aetrix verify that 74HCT74PW,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT74PW,118 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 74HCT74PW,118 meets industry standards.
7.What is the process for return or replacement of 74HCT74PW,118?
All 74HCT74PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT74PW,118, 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 74HCT74PW,118 part is unused and in its original packaging.
Return procedure for 74HCT74PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT74PW,118 Tags
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