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Nexperia USA Inc. 74AHCT374D,112
- Part No.:
- 74AHCT374D,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74AHCT374D,112.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,260
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Product details
Overview
74AHCT374D,112 from Nexperia is an octal positive-edge-triggered D-type flip-flop with 3-state outputs, designed for data latching and bus interface in 5 V TTL-compatible digital systems. It features a single clock (CP) input, active-low output enable (OE), 8 independent D inputs and Q outputs, operates from 4.5 V to 5.5 V, and supports -40 °C to +125 °C industrial temperature range.
For engineers reviewing the 74AHCT374D,112 datasheet, 74AHCT374D,112 pinout, 74AHCT374D,112 application, or 74AHCT374D,112 equivalent, key selection criteria include TTL-level input compatibility, 3-state bus-driving capability, propagation delay ≤9.4 ns (CL = 15 pF), set-up/hold times of 2.5 ns each, and SO20 package suitability for legacy PCB layouts.
Technical Context
This device implements eight independent edge-triggered D flip-flops sharing one clock and one 3-state output enable control line. Each flip-flop captures the logic state of its D input on the LOW-to-HIGH transition of CP, with no internal feedback or asynchronous reset/set.
The OE input directly controls all eight outputs in parallel, forcing them into high-impedance state without affecting stored register values. Inputs are TTL-compatible (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), enabling direct interfacing with legacy 5 V logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74AHCT - TTL-compatible CMOS, ensures interoperability with 5 V bipolar logic without level shifters |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard 5 V rail with ±10% tolerance; not operable below 4.5 V |
| Propagation Delay (tpd) | 4.3 ns (typ) / 9.4 ns (max) at CL = 15 pF - enables reliable operation up to 100 MHz system clocks |
| Set-up / Hold Time | 2.5 ns / 2.5 ns - tight timing window requires precise clock/data alignment in synchronous designs |
| Output Drive Strength | ±8 mA (IOH/ IOL) - sufficient to drive standard TTL loads and moderate PCB trace capacitance |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive, industrial control, and extended-range embedded applications |
| ESD Protection | HBM >2000 V, CDM >1000 V - robust handling in manufacturing and field-replaceable modules |
Pinout & Package
74AHCT374D,112 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width. Pin 1 is marked by a notch or dot; pin numbering follows standard counter-clockwise convention when viewing the top marking side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | 3-state output enable | Active-low control: HIGH disables all Q outputs to high-Z; does not affect internal register state |
| 2–9, 12, 15–16, 19 (Q0–Q7) | Flip-flop output | Octal 3-state buffered outputs; each mirrors corresponding D input after CP edge if OE = LOW |
| 3–4, 7–8, 13–14, 17–18 (D0–D7) | Data input | Independent asynchronous inputs; sampled only on LOW-to-HIGH CP transition meeting tsu/th |
| 10 (GND) | Ground reference | Primary 0 V return path for logic and output current; must be low-impedance for noise immunity |
| 11 (CP) | Clock input | Edge-sensitive trigger: only LOW-to-HIGH transitions latch D inputs; no internal debouncing |
| 20 (VCC) | Power supply | Single 4.5–5.5 V supply; decoupling capacitor required within 1 cm of pin for stable switching |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V - eliminates need for external level translators in 5 V mixed-logic systems |
| Overvoltage-tolerant inputs | Withstands up to 5.5 V regardless of VCC - allows safe hot-plug or partial-power-down scenarios |
| High noise immunity | Input hysteresis and CMOS threshold design yield >0.4 V noise margin at VCC = 5 V - reduces false triggering in noisy industrial environments |
| Low dynamic power | ICC = 4.0 μA (typ) at VCC = 5.5 V, static; CPD = 12 pF - enables low-power operation in battery-backed or thermally constrained systems |
| Industrial temperature grade | Specified from -40 °C to +125 °C - validated across full range for storage, bias, and switching performance |
Applications
| Microcontroller Bus Interface | Digital Signal Acquisition |
|---|---|
|
Use Scenario: Isolating MCU GPIO pins from a shared 8-bit data bus during read/write cycles. IC Role / Device Role / Timing Role: Acts as bidirectional bus latch: stores peripheral data on CP edge and presents it to MCU while OE enables read access. Use Value: Enables deterministic timing between CPU and slower peripherals via synchronous sampling, eliminating metastability risks from asynchronous handshaking. |
Use Scenario: Capturing parallel outputs from ADCs or sensor arrays before serial conversion. IC Role / Device Role / Timing Role: Synchronizes 8-channel analog-to-digital sample data to a master system clock using CP edge. Use Value: Provides simultaneous, glitch-free snapshot of multi-channel signals - critical for phase-coherent acquisition in motor control or audio sampling. |
| Industrial PLC I/O Expansion | Legacy System Bus Buffering |
|
Use Scenario: Extending discrete I/O capacity in programmable logic controllers using backplane-mounted modules. IC Role / Device Role / Timing Role: Latches control commands from PLC CPU and drives relay or opto-isolator outputs via 3-state-enabled bus arbitration. Use Value: Supports hot-swap-safe module insertion via OE-controlled isolation, preventing bus contention during field maintenance. |
Use Scenario: Interfacing modern microcontrollers with legacy 8-bit ISA or Z80-based peripheral cards. IC Role / Device Role / Timing Role: Translates TTL-level address/data strobes and provides bus hold-off during DMA cycles using OE gating. Use Value: Maintains signal integrity and timing compliance across mixed-generation hardware, avoiding timing skew from passive pull-ups or long traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHCT374PW,118 | TSSOP20 package (4.4 mm width); identical electrical specs and pinout | Requires re-layout for smaller footprint; better thermal dissipation at high density | Select for space-constrained PCBs where SO20 footprint is unavailable |
| SN74AHCT374N | Through-hole PDIP-20 package; same logic function but different mechanical form factor | Suitable for prototyping, educational kits, or legacy through-hole assembly lines | Choose when manual soldering, breadboarding, or backward compatibility with DIP sockets is required |
Compared with 74AHCT374D,112, the TSSOP variant offers higher board density and improved thermal performance, while the PDIP version supports rapid prototyping and legacy manufacturing - all share identical timing, voltage, and functional behavior.
Availability
74AHCT374D,112 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and test equipment requiring stable component supply over extended product lifecycles.
Supply support for 74AHCT374D,112 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 focused on essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74AHCT series targets robust, pin-compatible replacements for legacy TTL logic in mixed-voltage and high-reliability applications - emphasizing interoperability, wide temperature operation, and ESD resilience.
FAQ
Can 74AHCT374D,112 operate at 3.3 V?
No. The 74AHCT374D,112 is specifically designed for TTL-compatible operation and requires VCC between 4.5 V and 5.5 V. At 3.3 V, input thresholds (VIH = 2.0 V min) may not be reliably met, and output drive strength degrades significantly. Use 74AHC374D for 3.3 V systems.
What happens to stored data when OE is HIGH?
Stored data remains intact in all eight flip-flops. The OE signal affects only output drivers - when HIGH, Q0–Q7 enter high-impedance state without altering internal register contents. Data is preserved until the next valid CP edge.
Is there an internal power-on reset circuit?
No. The 74AHCT374D,112 has no built-in power-on reset. Flip-flop states are undefined at power-up and depend on initial D-input levels and first CP edge. External reset sequencing or initialization firmware is required for deterministic startup behavior.
How does input overvoltage tolerance work?
Input protection diodes clamp voltages up to 5.5 V relative to GND, independent of VCC. This allows safe connection to 5 V buses even when VCC is off or at intermediate levels - critical for hot-swap and partial-power-down architectures.
74AHCT374D,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 130 MHz
- Max Propagation Delay @ V, Max CL:
- 10.4ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74AHCT374D,112 FAQ
1.How can I place an order for 74AHCT374D,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT374D,112 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 74AHCT374D,112 reliable?
The price and inventory of 74AHCT374D,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT374D,112 is usually 5 days.
3.What payment methods are accepted for 74AHCT374D,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT374D,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT374D,112?
74AHCT374D,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT374D,112 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 74AHCT374D,112?
For technical support, including 74AHCT374D,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT374D,112 requirements.
6.How does Aetrix verify that 74AHCT374D,112 is sourced from the original manufacturer or authorized distributors?
All 74AHCT374D,112 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 74AHCT374D,112 meets industry standards.
7.What is the process for return or replacement of 74AHCT374D,112?
All 74AHCT374D,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT374D,112, 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 74AHCT374D,112 part is unused and in its original packaging.
Return procedure for 74AHCT374D,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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