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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments 74ALVCH16825DLR

Name: 74ALVCH16825DLR
Brand: Texas Instruments
SKU: 74ALVCH16825DLR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ALVCH16825DLR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 56-BSSOP (0.295", 7.50mm Width)

Datasheet:: 74ALVCH16825DLR.pdf

Description:: IC BUFFER NON-INVERT 3.6V 56SSOP

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Product details

Overview

74ALVCH16825DLR from Texas Instruments is an 18-bit noninverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V V_CC operation. It features dual 9-bit sections, bus-hold circuitry on all data inputs, and two independent 2-input AND-gated output-enable controls (active-low OE1/OE2). It is used in memory address buffering, clock distribution, and bus interface applications requiring level translation and high drive strength.

For engineers reviewing the 74ALVCH16825DLR datasheet, 74ALVCH16825DLR pinout, 74ALVCH16825DLR application, or 74ALVCH16825DLR equivalent, key selection criteria include V_CC operating range (1.65–3.6 V), bus-hold input retention, 3-state timing (t_en ≤ 6 ns at 2.5 V), output drive capability (±24 mA at 3 V), and SSOP-56 package compatibility.

Technical Context

This device implements two independent 9-bit buffer sections, each with true (noninverting) logic and separate 2-input AND-gated output-enable control. The active-low enable architecture ensures that any high signal on OE1 or OE2 forces its associated nine outputs into high-impedance state.

Bus-hold circuitry maintains stable logic levels on unused or floating inputs without external pullup/pulldown resistors. The EPIC™ submicron CMOS process enables low power consumption (I_CC = 40 µA max at 3.6 V), high noise immunity, and latch-up performance exceeding 250 mA per JESD 17.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 3.6 V - supports mixed-voltage system interfacing (1.8 V, 2.5 V, 3.3 V rails)
Output Drive	±24 mA at V_CC = 3 V - sufficient to drive 50-pF loads with fast edge rates in dense PCB layouts
Propagation Delay	3.4 ns typical at V_CC = 2.5 V - enables use in high-speed address/data paths up to ~150 MHz
Bus-Hold Current	±75 µA at V_CC = 3 V - actively retains input state without external biasing components
3-State Enable Time	4.7 ns typical at V_CC = 2.5 V - critical for glitch-free bus arbitration in shared-memory systems
Input Voltage Thresholds	V_IL = 0.8 V / V_IH = 2.0 V at V_CC = 3.0 V - compatible with LVTTL and ALVC logic families
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded and communications equipment

Pinout & Package

74ALVCH16825DLR is packaged in a 56-pin Shrink Small-Outline Package (SSOP), designated DL, with 0.5-mm lead pitch and 13.9 mm × 7.9 mm body dimensions. The package is RoHS-compliant, moisture-sensitivity Level-1 rated, and suitable for standard reflow soldering.

Pin/Terminal	Circuit Role	Design Meaning
1OE1, 1OE2, 2OE1, 2OE2	Section output-enable inputs	Active-low AND-gated enables: either OE high disables corresponding 9-bit output group
1A1–1A9, 2A1–2A9	Data inputs	Bus-hold enabled - no external termination required for floating or unterminated traces
1Y1–1Y9, 2Y1–2Y9	True-buffered outputs	3-state capable; driven low/high when enabled, high-Z when disabled
V_CC (Pins 7, 22, 35, 46, 50)	Power supply	Five distributed V_CC pins minimize IR drop and improve noise margin across wide bus
GND (Pins 4, 11, 14, 15, 24, 33, 37, 42, 49)	Ground reference	Nine GND pins provide low-inductance return paths for 18 outputs and internal logic

Key Features

Feature	Design Value
Bus-hold circuitry	Eliminates need for 18 external pullup/pulldown resistors on data inputs, reducing BOM count and board area
Dual 9-bit independent sections	Enables flexible partitioning - e.g., one section for address lines, another for data strobes - without inter-section coupling
EPIC™ submicron CMOS process	Delivers 40 µA max I_CC at 3.6 V and >250 mA latch-up immunity, supporting robust industrial operation
Wide V_CC range (1.65–3.6 V)	Permits direct interface between 1.8-V FPGAs and 3.3-V peripherals without level shifters
Low 3-state disable time (4.5 ns min)	Reduces bus contention window during multi-driver arbitration in shared-memory subsystems

Applications

Memory Address Buffering	High-Speed Clock Distribution
Use Scenario: Driving 18-bit address buses from microcontroller or FPGA to multiple SRAM/Flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control synchronizes address latching and prevents bus conflicts during chip-select transitions. Use Value: Bus-hold inputs retain last valid address during idle cycles; ±24 mA drive ensures clean edges into 50-pF loads across 10+ cm traces.	Use Scenario: Distributing a single system clock to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs) with matched skew. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer replicates clock signal while enabling/disabling individual branches via OE controls. Use Value: 3.4 ns t_pd and <100 ps channel-to-channel skew support jitter-sensitive sampling at ≥100 MHz.
PCI/ISA Bus Interface	Industrial Backplane Transceiver
Use Scenario: Isolating and driving legacy PCI or ISA bus signals between motherboard and expansion cards. IC Role / Device Role / Timing Role: Bidirectional bus driver with 3-state outputs manages direction control and load matching on shared data/address lines. Use Value: V_CC range covers 3.3-V PCI and 5-V tolerant input thresholds (via bus-hold); 2.5-V operation meets ISA timing budgets.	Use Scenario: Interfacing modular I/O cards to a central controller over a 18-line parallel backplane in factory automation systems. IC Role / Device Role / Timing Role: Robust 3-state driver provides ESD-hardened (2 kV HBM), latch-up-immune signal conditioning for noisy industrial environments. Use Value: –40°C to +85°C rating and 250 mA latch-up immunity ensure reliability in uncontrolled cabinet temperatures and voltage transients.

Memory Address Buffering

High-Speed Clock Distribution

Use Scenario: Driving 18-bit address buses from microcontroller or FPGA to multiple SRAM/Flash devices on a shared bus.

IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control synchronizes address latching and prevents bus conflicts during chip-select transitions.

Use Value: Bus-hold inputs retain last valid address during idle cycles; ±24 mA drive ensures clean edges into 50-pF loads across 10+ cm traces.

Use Scenario: Distributing a single system clock to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs) with matched skew.

IC Role / Device Role / Timing Role: Low-skew, high-drive buffer replicates clock signal while enabling/disabling individual branches via OE controls.

Use Value: 3.4 ns t_pd and <100 ps channel-to-channel skew support jitter-sensitive sampling at ≥100 MHz.

PCI/ISA Bus Interface

Industrial Backplane Transceiver

Use Scenario: Isolating and driving legacy PCI or ISA bus signals between motherboard and expansion cards.

IC Role / Device Role / Timing Role: Bidirectional bus driver with 3-state outputs manages direction control and load matching on shared data/address lines.

Use Value: V_CC range covers 3.3-V PCI and 5-V tolerant input thresholds (via bus-hold); 2.5-V operation meets ISA timing budgets.

Use Scenario: Interfacing modular I/O cards to a central controller over a 18-line parallel backplane in factory automation systems.

IC Role / Device Role / Timing Role: Robust 3-state driver provides ESD-hardened (2 kV HBM), latch-up-immune signal conditioning for noisy industrial environments.

Use Value: –40°C to +85°C rating and 250 mA latch-up immunity ensure reliability in uncontrolled cabinet temperatures and voltage transients.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 18-bit 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16245ADGGR	Lower drive (±24 mA at 3.3 V), but no bus-hold; requires external termination	Suitable where board space allows pullups and lower propagation delay (2.8 ns) is prioritized	Select if cost sensitivity outweighs bus-hold convenience and layout simplification
74ALVCH162244DLR	Inverting output polarity; otherwise identical V_CC, timing, and bus-hold specs	Used where logic inversion is acceptable or required in signal path (e.g., active-low enable chains)	Choose only when system-level logic design mandates inverted outputs - not a drop-in replacement

Compared with SN74LVC16245ADGGR, 74ALVCH16825DLR reduces component count via integrated bus-hold and supports wider V_CC range; versus 74ALVCH162244DLR, it provides true (noninverting) output polarity essential for address/data integrity in memory interfaces.

Availability

74ALVCH16825DLR is available at Aetrix Electronics and suitable for industrial control systems, memory subsystems, and high-speed digital backplanes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 74ALVCH16825DLR 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 industrial and automotive ICs.

The ALVCH family delivers advanced 1.65–3.6-V CMOS logic optimized for low-power, high-speed bus interface applications - specifically targeting memory addressing, clock fanout, and parallel data transmission in space-constrained systems.

FAQ

What is the function of the bus-hold circuitry in the 74ALVCH16825DLR?

The bus-hold circuitry in the 74ALVCH16825DLR actively maintains the last valid logic state on each data input (1A1–1A9, 2A1–2A9) when left floating or unterminated. It draws ±75 µA at 3 V to prevent metastability and eliminates the need for 18 external pullup or pulldown resistors, simplifying PCB layout and reducing BOM cost. This feature is integral to the 74ALVCH16825DLR's design for robust operation in dynamic bus environments.

Can the 74ALVCH16825DLR operate at 1.8 V and still meet timing specifications?

Yes, the 74ALVCH16825DLR is fully characterized from 1.65 V to 3.6 V. At V_CC = 1.8 V, propagation delay is 4.1 ns (typical), 3-state enable time is 6 ns (typical), and output drive remains functional at ±4 mA. These values are specified in the official TI SCES039D datasheet and confirm reliable operation in 1.8-V FPGA I/O domains without derating. The 74ALVCH16825DLR maintains full functionality across its entire rated V_CC range.

How many independent 3-state control groups does the 74ALVCH16825DLR support?

The 74ALVCH16825DLR supports two independent 9-bit 3-state control groups: one controlled by OE1 inputs (1OE1/1OE2) for outputs 1Y1–1Y9, and another by OE2 inputs (2OE1/2OE2) for outputs 2Y1–2Y9. Each group uses a 2-input AND gate with active-low logic, meaning either OE input high forces all nine associated outputs into high-impedance. This architecture enables selective bus isolation without affecting the other section - a core capability of the 74ALVCH16825DLR.

What is the maximum capacitive load the 74ALVCH16825DLR can drive while maintaining specified timing?

The 74ALVCH16825DLR is tested and specified with a 50-pF load for switching characteristics (e.g., t_pd, t_en, t_dis). Its output structure supports sustained ±24 mA drive at 3 V, allowing reliable operation into typical PCB trace + receiver capacitance up to 50 pF. Exceeding this load increases propagation delay nonlinearly and may violate setup/hold windows; for >50-pF applications, the 74ALVCH16825DLR should be paired with local receivers or split loads. This 50-pF limit is explicitly defined in the SCES039D switching characteristics table.

Is the 74ALVCH16825DLR pin-compatible with other Widebus™ 18-bit buffers?

No - the 74ALVCH16825DLR has a unique 56-pin SSOP (DL) pinout optimized for dual 9-bit sections with distributed power/ground and dedicated OE pairs. It is not pin-compatible with SN74ALVCH162244DLR (inverting) or SN74LVC16245ADGGR (different pin mapping and no bus-hold). Substitution requires PCB layout revision. This pinout specificity is confirmed by TI's official package drawings DGG0056A and DL mechanical data, and is intrinsic to the 74ALVCH16825DLR's signal integrity design.

74ALVCH16825DLR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ALVCH

Package/Case:: 56-BSSOP (0.295", 7.50mm Width)

Packaging:: Bulk

Product Status:: Active

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 9

Input Type:: -

Output Type:: -

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 1.65V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-SSOP

74ALVCH16825DLR FAQ

1.How can I place an order for 74ALVCH16825DLR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ALVCH16825DLR 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 74ALVCH16825DLR reliable?

The price and inventory of 74ALVCH16825DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16825DLR is usually 5 days.

3.What payment methods are accepted for 74ALVCH16825DLR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVCH16825DLR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74ALVCH16825DLR?

74ALVCH16825DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ALVCH16825DLR 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 74ALVCH16825DLR?

For technical support, including 74ALVCH16825DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16825DLR requirements.

6.How does Aetrix verify that 74ALVCH16825DLR is sourced from the original manufacturer or authorized distributors?

All 74ALVCH16825DLR 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 74ALVCH16825DLR meets industry standards.

7.What is the process for return or replacement of 74ALVCH16825DLR?

All 74ALVCH16825DLR units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16825DLR, 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 74ALVCH16825DLR part is unused and in its original packaging.

Return procedure for 74ALVCH16825DLR:

1.Submit a request within 90 days.

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

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