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Texas Instruments SN74ALVCH16374DGG
- Part No.:
- SN74ALVCH16374DGG
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
SN74ALVCH16374DGG.pdf
- Description:
- BUS DRIVER, ALVC/VCX/A SERIES
- Quantity:
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Inventory:2,775
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Product details
Overview
SN74ALVCH16374 from Texas Instruments is a 16-bit edge-triggered D-type flip-flop with 3-state outputs, designed for 1.65-V to 3.6-V operation. It features dual 8-bit sections (1CLK/1D–1Q and 2CLK/2D–2Q), independent output-enable (1OE/2OE) control per section, bus-hold on all data inputs, and operates across –40°C to 85°C. It serves as a bidirectional bus interface register in high-speed digital systems.
For engineers reviewing the SN74ALVCH16374 datasheet, SN74ALVCH16374 pinout, SN74ALVCH16374 application, or SN74ALVCH16374 equivalent, key selection criteria include VCC range compatibility (1.65–3.6 V), 3-state output timing (tdis ≤ 4.3 ns at 3.3 V), bus-hold functionality, and DGG package thermal impedance (89°C/W).
Technical Context
This device implements two independent 8-bit positive-edge-triggered D-flip-flop banks, each with dedicated clock (1CLK/2CLK), data (1D1–1D8 / 2D1–2D8), output (1Q1–1Q8 / 2Q1–2Q8), and output-enable (1OE/2OE) signals. Internal bus-hold circuitry actively maintains valid logic levels on floating data inputs without external resistors.
Output enable is asynchronous and non-inverting: OE = low enables normal Q outputs; OE = high forces high-impedance (Z) state without affecting internal latch operation. The EPIC™ submicron CMOS process ensures low power consumption (ICC ≤ 40 µA at 3.6 V) and robust ESD protection (>2000 V HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports mixed-voltage system interfacing (e.g., 1.8-V core to 3.3-V I/O) |
| Propagation Delay (tpd) | 1 ns (min) to 4.2 ns (max) at 3.3 V - enables ≥150-MHz clock operation in synchronous bus designs |
| Output Drive (IOL/IOH) | ±24 mA at 3 V - sufficient to drive 50-pF loads with fast edge rates and minimal signal degradation |
| Bus-Hold Current | ±75 µA at 3 V - actively holds unused D inputs at valid logic levels, eliminating external pullup/pulldown components |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
| Input Transition Rate | 10 ns/V - specifies maximum allowable input slew rate to prevent metastability or false triggering |
| Thermal Impedance (θJA) | 89°C/W (DGG package) - determines safe power dissipation limit under natural convection cooling |
Pinout & Package
SN74ALVCH16374 is packaged in a 48-pin Thin Shrink Small-Outline (DGG) package with 0.5-mm pitch and 10.0-mm × 10.0-mm body size. Pin assignment follows standard Widebus™ layout with split power/ground rails for noise reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output Enable (active-low) | Asynchronous control of 3-state output drivers; OE = high places corresponding Q outputs in high-Z mode |
| 1CLK, 2CLK | Clock Input (positive-edge) | Triggers simultaneous latching of all eight D inputs in respective section on rising edge |
| 1D1–1D8, 2D1–2D8 | Data Inputs | Each has integrated bus-hold; retains last valid logic state when left floating or unconnected |
| 1Q1–1Q8, 2Q1–2Q8 | Registered Outputs | 3-state outputs capable of driving PCB traces directly; high-Z state isolates bus during contention |
| VCC (Pins 7, 18, 29, 40) | Supply Voltage | Four distributed VCC pins reduce IR drop and improve power integrity across 16-bit bus |
| GND (Pins 4, 10, 15, 21, 31, 34, 42, 45) | Ground Reference | Eight GND pins provide low-inductance return paths and minimize ground bounce in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC Range (1.65–3.6 V) | Enables interoperability between 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters |
| Independent Dual 8-Bit Sections | Allows flexible partitioning - e.g., one section for address latching, another for data buffering - with separate clock and OE control |
| Integrated Bus-Hold Circuitry | Eliminates need for 32 external pullup/pulldown resistors on D inputs, reducing BOM count and board space |
| High-Speed 3-State Outputs | Sub-5 ns disable time (tdis) and 1-ns min propagation delay support clean bus turnaround in multiplexed memory/data interfaces |
| Industrial Temperature Range | Validated operation from –40°C to +85°C ensures reliability in factory automation, networking, and base station equipment |
Applications
| Memory Interface Buffering | Parallel I/O Expansion |
|---|---|
Use Scenario: Latching address/data between an FPGA and SRAM or Flash memory operating at different voltage levels. IC Role / Device Role / Timing Role: Acts as a 16-bit registered bus interface, synchronizing asynchronous memory access with precise clock-edge alignment. Use Value: Prevents bus contention during read/write cycles via controlled 3-state output enable/disable, while bus-hold eliminates floating input risk during reset or standby. |
Use Scenario: Expanding GPIO count on a microcontroller by adding parallel input/output ports via shared data bus. IC Role / Device Role / Timing Role: Functions as a dual 8-bit I/O port register, with 1OE/2OE enabling independent direction control per byte. Use Value: Enables hot-swappable peripheral connection through high-Z isolation, and eliminates external biasing components via built-in bus-hold on all D inputs. |
| Backplane Data Latching | Test Equipment Signal Conditioning |
Use Scenario: Capturing parallel status signals from multiple line cards in telecom backplane architecture. IC Role / Device Role / Timing Role: Serves as a synchronized capture register, using common CLK to sample 16-bit status words across multiple modules. Use Value: Ensures deterministic sampling window via tight setup/hold times (tsu = 1.9 ns, th = 0.5 ns at 3.3 V), minimizing skew-induced errors. |
Use Scenario: Isolating and conditioning digital stimulus/response signals in automated test equipment (ATE) channel cards. IC Role / Device Role / Timing Role: Provides glitch-free signal routing via edge-triggered storage and fast 3-state switching (ten/tdis ≤ 4.8 ns). Use Value: Supports high-throughput test patterns with minimal inter-channel crosstalk due to low-output capacitance (Co = 7 pF) and distributed power/ground pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit registered buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16374ADGGR | Same pinout, identical function, but uses LVC process - lower ICC (20 µA vs. 40 µA), slightly higher VOL at 24 mA (0.55 V vs. 0.4 V at 3 V) | Preferred for ultra-low-power battery-operated systems where static current matters more than marginal VOL margin | Select SN74LVC16374ADGGR if supply current minimization is critical and 0.55-V VOL is acceptable under full load |
| 74ALVCH16374T | TSSOP-48 (DL package), θJA = 94°C/W vs. 89°C/W; otherwise identical electrical specs and pinout | Suitable where board layout constraints favor standard TSSOP over thin-profile DGG, accepting ~5% higher thermal resistance | Choose 74ALVCH16374T when mechanical fit or legacy footprint compatibility outweighs thermal performance optimization |
Compared with SN74ALVCH16374, SN74LVC16374ADGGR reduces quiescent current by half but trades off slight output voltage margin, while 74ALVCH16374T offers identical functionality in a thermally less efficient but mechanically interchangeable package.
Availability
SN74ALVCH16374 is available at Aetrix Electronics and suitable for industrial control systems, telecom backplane interfaces, and test equipment requiring stable component supply with long-term lifecycle assurance.
Supply support for SN74ALVCH16374 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 decades of experience in high-reliability interface and timing products.
The SN74ALVCH16374 belongs to TI's Widebus™ family of advanced bus-interface devices, engineered for high-speed, low-voltage, noise-immune parallel data transfer in industrial and communications infrastructure.
FAQ
What is the minimum recommended VCC for reliable operation of the SN74ALVCH16374?
The SN74ALVCH16374 is characterized for operation down to 1.65 V. Below this voltage, timing parameters such as setup time (tsu) and propagation delay (tpd) are not guaranteed, and bus-hold functionality may become unreliable. For designs targeting 1.8-V systems, SN74ALVCH16374 operates fully within specification and delivers verified 150-MHz clock capability at VCC = 1.8 V.
Does the SN74ALVCH16374 require external pullup resistors on its data inputs?
No. The SN74ALVCH16374 integrates active bus-hold circuitry on all 16 data inputs (1D1–1D8 and 2D1–2D8), which maintains valid logic states on floating or unused inputs without external components. This feature eliminates the need for 32 discrete pullup/pulldown resistors, simplifying layout and reducing BOM cost.
How does output-enable (OE) behavior affect internal latch state in the SN74ALVCH16374?
In the SN74ALVCH16374, OE is purely an output driver control signal and has no effect on internal flip-flop operation. While outputs are in high-impedance state (OE = high), the internal latches retain their stored data, and new data can still be clocked in on subsequent CLK edges - enabling seamless bus arbitration and glitch-free state updates.
What is the thermal performance difference between the DGG and DL packages for the SN74ALVCH16374?
The SN74ALVCH16374 in the DGG (thin shrink small-outline) package has a junction-to-ambient thermal impedance (θJA) of 89°C/W, while the DL (shrink small-outline) variant measures 94°C/W. This 5°C/W difference means the DGG package dissipates heat ~5.6% more efficiently under identical conditions, supporting higher sustained output drive or denser board layouts.
Can the SN74ALVCH16374 be used as two independent 8-bit registers?
Yes. The SN74ALVCH16374 contains two electrically isolated 8-bit sections: Section 1 (1CLK, 1D1–1D8, 1Q1–1Q8, 1OE) and Section 2 (2CLK, 2D1–2D8, 2Q1–2Q8, 2OE). Each section operates independently - clocks, data, outputs, and output enables are fully separate - allowing concurrent 8-bit latching with distinct timing and control.
SN74ALVCH16374DGG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74ALVCH16374DGG FAQ
1.How can I place an order for SN74ALVCH16374DGG through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH16374DGG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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6.How does Aetrix verify that SN74ALVCH16374DGG is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH16374DGG 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 SN74ALVCH16374DGG meets industry standards.
7.What is the process for return or replacement of SN74ALVCH16374DGG?
All SN74ALVCH16374DGG units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16374DGG, 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 SN74ALVCH16374DGG part is unused and in its original packaging.
Return procedure for SN74ALVCH16374DGG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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