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Home > Products > Integrated Circuits (ICs) > Logic > Flip Flops

Texas Instruments SN74AHC16374DL

Name: SN74AHC16374DL
Brand: Texas Instruments
SKU: SN74AHC16374DL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74AHC16374DL

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: 48-BSSOP (0.295", 7.50mm Width)

Datasheet:: SN74AHC16374DL.pdf

Description:: IC FF D-TYPE DUAL 8BIT 48SSOP

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Product details

Overview

SN74AHC16374DL from Texas Instruments is a 16-bit edge-triggered D-type flip-flop with 3-state outputs in a 48-pin SSOP (DL) package, operating from 2 V to 5.5 V, supporting 110 MHz max clock frequency at 5 V and featuring ±8 mA output drive, 2 ns hold time, and distributed V_CC/GND pins for noise reduction - used in high-speed bus interface and I/O port buffering applications.

For engineers reviewing the SN74AHC16374DL datasheet, SN74AHC16374DL pinout, SN74AHC16374DL application, or SN74AHC16374DL equivalent, key selection considerations include 16-bit synchronous latch behavior, dual 8-bit group enable control via independent OE inputs, 3-state bus-driving capability without external pullups, and compatibility with 2.5 V/3.3 V/5 V mixed-signal systems.

Technical Context

The SN74AHC16374DL implements two independent 8-bit edge-triggered D-type latches sharing no internal logic coupling - each with dedicated CLK and OE inputs - enabling flexible partitioning as either one 16-bit register or two synchronized 8-bit buffers. Its EPIC™ CMOS process ensures low static current (40 µA max ICC) and rail-to-rail output swing.

Timing is strictly positive-edge sensitive on CLK; data setup (3 ns min at 5 V) and hold (2 ns) requirements are met across –40°C to 85°C, while 3-state enable/disable delays (tPZH/tPLZ ≤ 10.5 ns at 5 V, CL = 15 pF) support clean bus turnaround in bidirectional data paths.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2 V to 5.5 V - supports direct interfacing with 2.5 V, 3.3 V, and 5 V logic families without level shifters.
Max Clock Frequency	110 MHz at V_CC = 5 V - enables high-throughput data latching in memory address/data buses and FIFO interfaces.
Output Drive	±8 mA at V_CC = 5 V - sufficient to directly drive 50-pF bus loads without external buffers or terminators.
Propagation Delay	t_PLH/t_PHL = 5.4 ns (typ) at V_CC = 5 V - ensures tight timing margins in synchronous digital systems with sub-10 ns cycle budgets.
3-State Enable Delay	t_PZH/t_PLZ = 5.1 ns (typ) at V_CC = 5 V - minimizes bus contention windows during direction switching in bidirectional transceivers.
Input Thresholds	V_IH = 3.85 V, V_IL = 1.65 V at V_CC = 5.5 V - provides 0.65 V noise margin against TTL-compatible signals.
ESD Rating	>2000 V HBM - meets industrial I/O port robustness requirements without external protection diodes.

Pinout & Package

SN74AHC16374DL uses a 48-pin Shrink Small-Outline Package (SSOP-DL), 12.4 mm × 6.2 mm body, 0.5 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant, with thermal impedance θ_JA = 63°C/W.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Independent 3-state output enables	Each controls eight Q outputs separately - allows interleaved bus access or partial register masking without affecting other byte lanes.
1CLK, 2CLK	Positive-edge clock inputs	Edge-triggered sampling of D inputs - enables synchronous capture of parallel data with precise timing alignment per 8-bit group.
1D1–1D8, 2D1–2D8	Data inputs	Two independent 8-bit parallel input ports - supports dual-channel data acquisition or split-word processing.
1Q1–1Q8, 2Q1–2Q8	3-state buffered outputs	High-drive, rail-to-rail outputs capable of driving capacitive buses directly - eliminates need for external bus drivers or pullup resistors.
V_CC, GND	Distributed power/ground	Multiple V_CC and GND pins placed across package - reduces simultaneous switching noise and improves signal integrity in high-speed operation.

Key Features

Feature	Design Value
Flow-through pin architecture	Input and output pins arranged on opposite sides - simplifies PCB trace routing and minimizes layer count in dense bus layouts.
Dual independent 8-bit groups	Separate CLK and OE per group - enables asymmetric clocking, staggered enable timing, or independent data capture windows.
Bus-hold circuitry not included	No internal weak pullups/pulldowns - requires external biasing of unused inputs per TI SCBA004 to prevent floating node oscillation.
Latch-up immunity	>250 mA per JESD 17 - withstands transient overcurrent events common in hot-plug or shared-bus environments.
Low dynamic power	C_pd = 32 pF at 5 V - reduces switching power consumption in high-frequency register files and pipeline stages.

Applications

Memory Address Latching	I/O Port Expansion
Use Scenario: Capturing 16-bit microprocessor address bus signals before accessing external SRAM or flash memory. IC Role / Device Role / Timing Role: Synchronous edge-triggered latch holding stable address values during memory read/write cycles. Use Value: Eliminates address skew between upper/lower bytes and ensures setup/hold compliance with memory access timing windows.	Use Scenario: Extending GPIO count on an MCU by adding parallel 16-bit bidirectional data ports. IC Role / Device Role / Timing Role: Dual 8-bit 3-state buffer providing direction-controlled data transfer between MCU and peripheral devices. Use Value: Enables zero-latency bus turnaround using independent OE controls - avoids dead cycles during direction switching.
Bidirectional Bus Driving	Working Register File
Use Scenario: Interfacing multiple controllers to a shared 16-bit data bus in industrial PLC backplanes. IC Role / Device Role / Timing Role: High-drive 3-state transceiver isolating bus segments during arbitration or fault conditions. Use Value: ±8 mA drive strength sustains signal integrity across 15 pF loads at 110 MHz - prevents waveform degradation without termination networks.	Use Scenario: Storing intermediate computation results in FPGA-based DSP pipelines or real-time control loops. IC Role / Device Role / Timing Role: Low-propagation-delay register stage synchronizing multi-cycle arithmetic operations. Use Value: 5.4 ns t_PLH enables pipelining at >100 MHz clock rates - critical for meeting throughput targets in latency-sensitive algorithms.

Memory Address Latching

I/O Port Expansion

Use Scenario: Capturing 16-bit microprocessor address bus signals before accessing external SRAM or flash memory.

IC Role / Device Role / Timing Role: Synchronous edge-triggered latch holding stable address values during memory read/write cycles.

Use Value: Eliminates address skew between upper/lower bytes and ensures setup/hold compliance with memory access timing windows.

Use Scenario: Extending GPIO count on an MCU by adding parallel 16-bit bidirectional data ports.

IC Role / Device Role / Timing Role: Dual 8-bit 3-state buffer providing direction-controlled data transfer between MCU and peripheral devices.

Use Value: Enables zero-latency bus turnaround using independent OE controls - avoids dead cycles during direction switching.

Bidirectional Bus Driving

Working Register File

Use Scenario: Interfacing multiple controllers to a shared 16-bit data bus in industrial PLC backplanes.

IC Role / Device Role / Timing Role: High-drive 3-state transceiver isolating bus segments during arbitration or fault conditions.

Use Value: ±8 mA drive strength sustains signal integrity across 15 pF loads at 110 MHz - prevents waveform degradation without termination networks.

Use Scenario: Storing intermediate computation results in FPGA-based DSP pipelines or real-time control loops.

IC Role / Device Role / Timing Role: Low-propagation-delay register stage synchronizing multi-cycle arithmetic operations.

Use Value: 5.4 ns t_PLH enables pipelining at >100 MHz clock rates - critical for meeting throughput targets in latency-sensitive algorithms.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit D-type flip-flop applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AHC16373DLR	Latch (transparent) instead of edge-triggered flip-flop; identical pinout and voltage specs.	Suitable for level-sensitive data gating but not for synchronous clock-domain crossing.	Select SN74AHC16373DLR only when transparent latching behavior is required - not a functional replacement for SN74AHC16374DL's edge-triggered operation.
SN74LVCH16374ADLR	Lower V_CC range (1.65–3.6 V); higher drive (±24 mA); same 48-pin DL package.	Optimized for 3.3 V-only systems with heavier bus loading; not 5 V tolerant.	Choose SN74LVCH16374ADLR for 3.3 V designs needing stronger drive; avoid in mixed-voltage or 5 V systems where SN74AHC16374DL remains compatible.

Compared with SN74AHC16374DL, SN74AHC16373DLR replaces edge-triggered storage with level-sensitive latching - altering timing behavior fundamentally - while SN74LVCH16374ADLR trades 5 V tolerance for enhanced 3.3 V drive and lower power, requiring voltage domain isolation in legacy 5 V designs.

Availability

SN74AHC16374DL is available at Aetrix Electronics and suitable for memory interface design, industrial I/O expansion, bidirectional bus management, and synchronous register file implementation requiring stable component supply across extended production lifecycles.

Supply support for SN74AHC16374DL 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and broad application coverage.

The SN74AHC16374DL belongs to TI's Widebus™ family of high-speed bus-interface logic, engineered specifically for noise-resilient, high-density PCB layouts in industrial control, test equipment, and communications infrastructure.

FAQ

What is the operating temperature range for the SN74AHC16374DL?

The SN74AHC16374DL is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade range supports deployment in factory automation, motor drives, and outdoor instrumentation where thermal stability is critical. The device does not support extended military-range operation like the SN54AHC16374 variant.

Does the SN74AHC16374DL include bus-hold circuitry on its inputs?

No, the SN74AHC16374DL does not integrate bus-hold circuitry. All unused inputs must be externally tied to V_CC or GND per TI application report SCBA004 to prevent floating nodes, which could cause increased ICC, erratic switching, or ESD susceptibility. This requirement applies to both D and OE inputs when not actively driven.

Can the SN74AHC16374DL drive a 50-pF load at 100 MHz?

Yes, the SN74AHC16374DL supports f_max = 75 MHz at CL = 50 pF and V_CC = 5 V, as specified in the switching characteristics table. While 100 MHz exceeds this limit, operation at that frequency would require reducing load capacitance to ≤15 pF (where f_max = 110 MHz) or lowering V_CC to optimize speed-power tradeoffs.

How are the two 8-bit sections of the SN74AHC16374DL electrically isolated?

The SN74AHC16374DL contains two fully independent 8-bit sections: Section 1 (pins 1D1–1Q8, 1CLK, 1OE) and Section 2 (pins 2D1–2Q8, 2CLK, 2OE). They share only V_CC and GND rails - no internal signal coupling exists. This allows asynchronous clocking, separate enable timing, and independent data capture without crosstalk or timing interference.

Is the SN74AHC16374DL pin-compatible with other Widebus™ 16-bit flip-flops in DL package?

Yes, the SN74AHC16374DL shares identical 48-pin DL package dimensions and pin mapping with SN74AHC16373DLR (latch) and SN74AHC16244DLR (buffer), enabling drop-in substitution where function permits. However, clocking behavior (edge vs. level), output enable polarity, and internal logic differ - electrical and timing validation is required before replacement.

SN74AHC16374DL Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AHC

Package/Case:: 48-BSSOP (0.295", 7.50mm Width)

Packaging:: Bulk

Product Status:: Obsolete

Function:: Standard

Type:: D-Type

Output Type:: Tri-State, Non-Inverted

Number of Elements:: 2

Number of Bits per Element:: 8

Clock Frequency:: 120 MHz

Max Propagation Delay @ V, Max CL:: 10.1ns @ 5V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 8mA, 8mA

Voltage - Supply:: 2V ~ 5.5V

Current - Quiescent (Iq):: 4 µA

Input Capacitance:: 2.5 pF

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-SSOP

SN74AHC16374DL FAQ

1.How can I place an order for SN74AHC16374DL through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74AHC16374DL 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 SN74AHC16374DL reliable?

The price and inventory of SN74AHC16374DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC16374DL is usually 5 days.

3.What payment methods are accepted for SN74AHC16374DL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC16374DL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74AHC16374DL?

SN74AHC16374DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74AHC16374DL 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 SN74AHC16374DL?

For technical support, including SN74AHC16374DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC16374DL requirements.

6.How does Aetrix verify that SN74AHC16374DL is sourced from the original manufacturer or authorized distributors?

All SN74AHC16374DL 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 SN74AHC16374DL meets industry standards.

7.What is the process for return or replacement of SN74AHC16374DL?

All SN74AHC16374DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC16374DL, 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 SN74AHC16374DL part is unused and in its original packaging.

Return procedure for SN74AHC16374DL:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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