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

Texas Instruments SN74ALVCH16344DLR

Name: SN74ALVCH16344DLR
Brand: Texas Instruments
SKU: SN74ALVCH16344DLR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ALVCH16344DLR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74ALVCH16344DLR.pdf

Description:: IC ADDRESS DRIVER 3.6V 56SSOP

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Product details

Overview

SN74ALVCH16344DLR from Texas Instruments is a 1-bit-to-4-bit address driver with 3-state outputs, designed for 1.65-V to 3.6-V V_CC operation. It features bus-hold circuitry on all data inputs, eliminates need for external pullup/pulldown resistors, supports ±24 mA output drive at 3 V, and operates across -40°C to 85°C. It is used in memory subsystems where a single address line selects among four distinct memory locations.

For engineers reviewing the SN74ALVCH16344DLR datasheet, SN74ALVCH16344DLR pinout, SN74ALVCH16344DLR application, or SN74ALVCH16344DLR equivalent, key selection criteria include V_CC range compatibility (1.65–3.6 V), 56-pin SSOP package footprint, bus-hold input retention, 3-state enable timing (t_en ≤ 6.2 ns at 2.5 V), and I/O voltage tolerance up to V_CC + 0.5 V.

Technical Context

The SN74ALVCH16344DLR implements eight independent 1-bit-to-4-bit address driver banks, each with dedicated output-enable (OE1–OE4) control. Each bank accepts one input (A) and drives four buffered, 3-state outputs (B1–B4), enabling parallel address expansion without external logic.

Its bus-hold circuitry actively maintains valid logic states on undriven inputs using ±75 µA hold current at 3 V, eliminating floating node risks. The device meets JESD 17 latch-up immunity (>250 mA) and JESD 22 ESD ratings (2000-V HBM, 200-V MM), supporting robust operation in mixed-signal embedded systems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 3.6 V - Enables interoperability with 1.8-V, 2.5-V, and 3.3-V logic families in mixed-voltage memory interfaces.
Output Drive	±24 mA at 3 V - Sufficient to drive four TTL loads or terminate short PCB traces without external buffers.
t_pd (Max)	4.6 ns at 2.5 V - Supports address propagation at >100 MHz system clock rates with margin for setup/hold timing.
Bus-Hold Current	±75 µA at 3 V - Maintains stable input state during hot-swap or partial power-down without external biasing.
I/O Voltage Range	-0.5 V to V_CC + 0.5 V - Allows safe interfacing with overvoltage-tolerant memory controllers or legacy peripherals.
Operating Temp	-40°C to +85°C - Qualified for industrial temperature operation in base station, networking, and automation equipment.
Power Dissipation	84 pF typical at 3.3 V - Predictable dynamic loading for accurate power budgeting in high-density memory modules.

Pinout & Package

SN74ALVCH16344DLR uses a 56-pin SSOP (DL) package with 0.5-mm lead pitch, 12.6 mm × 6.2 mm body size, and JEDEC MO-118 compliance. Pin numbering follows standard top-view layout with GND and V_CC distributed across multiple pins for low-impedance power delivery.

Pin/Terminal	Circuit Role	Design Meaning
1A, 2A, 3A, 4A, 5A, 6A, 7A, 8A	Input Address Line	Single-bit address input per bank; routed to internal buffer driving corresponding B outputs.
1B1–1B4, ..., 8B1–8B4	Output Address Bits	Four buffered, 3-state outputs per bank; collectively expand one address bit into four parallel lines.
OE1–OE4	Bank Output Enable	Active-high enables outputs for banks 1–4 (OE1 controls banks 1&2; OE2 controls banks 3&4; OE3/OE4 control banks 5–8).
GND (Pins 4, 11, 18, 25, 32, 39, 46, 53)	Ground Reference	Eight dedicated ground pins minimize ground bounce and support simultaneous switching of all 32 outputs.
V_CC (Pins 7, 21, 35, 49)	Supply Voltage	Four distributed V_CC pins ensure stable core voltage under high-output-drive transients.

Key Features

Feature	Design Value
Bus-Hold Inputs	Eliminates need for 16 external pullup/pulldown resistors across eight address inputs, reducing BOM count and board area.
Independent Bank Enables	Four OE inputs control eight banks in grouped pairs, allowing selective activation of memory regions without global reset.
Wide V_CC Range	1.65–3.6 V operation supports direct interface with LPDDR2/3 address buses and legacy 2.5-V controllers.
Low Skew Outputs	0.35 ns max skew within bank ensures synchronous assertion of four address bits critical for multi-bank memory access timing.
High ESD/Latch-Up Robustness	2000-V HBM and >250 mA latch-up immunity enable reliable use in manufacturing-handling and field-deployed systems.

Applications

Memory Module Address Expansion	Industrial PLC I/O Expansion
Use Scenario: Expanding a 16-bit address bus to access four separate 1-MB SRAM banks in a programmable logic controller. IC Role / Device Role / Timing Role: Address driver translating each A_n bit into four parallel outputs (B_n1–B_n4) synchronized by OE signals to select active memory region. Use Value: Enables deterministic 4-way memory mapping with <4.6 ns propagation delay, meeting tight 100-MHz bus cycle timing.	Use Scenario: Driving address lines for dual-port FPGA configuration PROMs in redundant control modules. IC Role / Device Role / Timing Role: Level-shifting and fanout buffer between 3.3-V FPGA address outputs and 2.5-V PROM inputs with bus-hold retention during reconfiguration. Use Value: Prevents address glitches during FPGA partial reconfig by holding last valid state on undriven inputs without external components.
Network Switch ASIC Interface	Medical Imaging Data Buffering
Use Scenario: Interfacing a 1.8-V packet classifier ASIC to four 3.3-V TCAM devices requiring simultaneous address strobing. IC Role / Device Role / Timing Role: Voltage-translating address driver with independent OE control per TCAM bank to stagger access and reduce peak current draw. Use Value: Achieves level-shifted, low-skew address distribution while limiting supply current surge to <100 mA per V_CC pin.	Use Scenario: Routing address signals from a radiation-tolerant microcontroller to four isolated flash memory banks in MRI subsystems. IC Role / Device Role / Timing Role: Radiation-hardened-by-design address expander providing latch-up immune, ESD-protected signal routing with fail-safe bus-hold. Use Value: Ensures address integrity during single-event transients via ±250 mA latch-up immunity and 2000-V HBM protection.

Memory Module Address Expansion

Industrial PLC I/O Expansion

Use Scenario: Expanding a 16-bit address bus to access four separate 1-MB SRAM banks in a programmable logic controller.

IC Role / Device Role / Timing Role: Address driver translating each A_n bit into four parallel outputs (B_n1–B_n4) synchronized by OE signals to select active memory region.

Use Value: Enables deterministic 4-way memory mapping with <4.6 ns propagation delay, meeting tight 100-MHz bus cycle timing.

Use Scenario: Driving address lines for dual-port FPGA configuration PROMs in redundant control modules.

IC Role / Device Role / Timing Role: Level-shifting and fanout buffer between 3.3-V FPGA address outputs and 2.5-V PROM inputs with bus-hold retention during reconfiguration.

Use Value: Prevents address glitches during FPGA partial reconfig by holding last valid state on undriven inputs without external components.

Network Switch ASIC Interface

Medical Imaging Data Buffering

Use Scenario: Interfacing a 1.8-V packet classifier ASIC to four 3.3-V TCAM devices requiring simultaneous address strobing.

IC Role / Device Role / Timing Role: Voltage-translating address driver with independent OE control per TCAM bank to stagger access and reduce peak current draw.

Use Value: Achieves level-shifted, low-skew address distribution while limiting supply current surge to <100 mA per V_CC pin.

Use Scenario: Routing address signals from a radiation-tolerant microcontroller to four isolated flash memory banks in MRI subsystems.

IC Role / Device Role / Timing Role: Radiation-hardened-by-design address expander providing latch-up immune, ESD-protected signal routing with fail-safe bus-hold.

Use Value: Ensures address integrity during single-event transients via ±250 mA latch-up immunity and 2000-V HBM protection.

Equivalent & Alternatives

The following parts are listed as comparable options for similar address driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ALVCH16344DGGR	TSSOP-56 package (DGG), 0.25-mm lead pitch, 12.5 mm × 6.1 mm body - smaller footprint but higher assembly cost.	Suitable for space-constrained designs where PCB real estate is prioritized over hand-solderability or thermal mass.	Select DGGR when board density exceeds SSOP routing capability; verify solder paste volume and reflow profile for fine-pitch leads.
SN74LVC16344DLR	No bus-hold circuitry; requires external pullup/pulldown resistors on all 8 inputs; lower drive (±24 mA only at 3.3 V, not 3 V).	Applicable where input biasing is already implemented or where reduced power consumption offsets added resistor count.	Choose LVC16344DLR only if bus-hold is unnecessary and existing design uses external biasing - avoid in hot-swap or partial-power scenarios.

Compared with SN74ALVCH16344DGGR, the SN74ALVCH16344DLR offers superior thermal dissipation and easier manual rework due to larger SSOP leads, while SN74LVC16344DLR lacks bus-hold - making SN74ALVCH16344DLR the only option supporting glitch-free operation during undriven input transitions.

Availability

SN74ALVCH16344DLR is available at Aetrix Electronics and suitable for memory subsystems, industrial PLCs, network switch interfaces, and medical imaging equipment requiring stable component supply across extended product lifecycles.

Supply support for SN74ALVCH16344DLR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The SN74ALVCH16344DLR belongs to TI's Widebus™ family of advanced CMOS logic devices, engineered specifically for high-speed, low-voltage address and data bus expansion in memory-intensive embedded systems.

FAQ

What is the recommended power-up sequence for SN74ALVCH16344DLR to ensure high-impedance outputs?

To guarantee high-impedance outputs during power-up, tie all OE pins to V_CC through a pullup resistor. TI specifies minimum resistor value based on driver current-sinking capability - typically 10 kΩ suffices for most 3.3-V systems. This prevents unintended output assertion before system initialization completes. The SN74ALVCH16344DLR datasheet explicitly warns against leaving OE floating, as it may cause bus contention during V_CC ramp. Always verify OE voltage reaches >2 V before releasing reset in your SN74ALVCH16344DLR-based design.

Does SN74ALVCH16344DLR support mixed-voltage operation between input and output sides?

No, SN74ALVCH16344DLR does not support true mixed-voltage I/O. All inputs and outputs reference the same V_CC rail (1.65–3.6 V), and I/O voltage tolerance is limited to -0.5 V to V_CC + 0.5 V. While it can interface with lower-voltage drivers (e.g., 1.8-V) when V_CC = 1.8 V, it cannot simultaneously accept 1.8-V inputs while driving 3.3-V loads. For such level-shifting, external translators or devices like SN74AVC16T245 are required. The SN74ALVCH16344DLR functions strictly as a voltage-domain-consistent address expander.

How does bus-hold circuitry in SN74ALVCH16344DLR affect PCB layout and termination?

Bus-hold circuitry in SN74ALVCH16344DLR actively maintains valid logic states on undriven inputs using ±75 µA hold current at 3 V, making external pullup/pulldown resistors unnecessary and potentially harmful. TI explicitly advises against combining bus-hold with external biasing, as it creates conflicting current paths and increases power consumption. Layout should avoid stubs longer than 2 inches on address lines to prevent reflections that could overcome bus-hold strength. The SN74ALVCH16344DLR's integrated bus-hold reduces net count and simplifies routing - especially beneficial in dense memory module layouts.

What is the maximum number of SN74ALVCH16344DLR devices that can be cascaded on a single address bus?

SN74ALVCH16344DLR is not designed for cascading - it is a parallel address expander, not a serial shift register or daisy-chainable device. Each SN74ALVCH16344DLR accepts one input per bank and drives four outputs; cascading would require external logic to serialize outputs or decode enable signals, violating its intended 1-bit-to-4-bit fanout function. For wider expansion (e.g., 1-to-16), use multiple SN74ALVCH16344DLR devices in parallel with shared A inputs and independently controlled OE lines. The datasheet confirms no internal feedback or chaining capability exists in the SN74ALVCH16344DLR architecture.

Can SN74ALVCH16344DLR be used in automotive applications requiring AEC-Q100 qualification?

No, SN74ALVCH16344DLR is not AEC-Q100 qualified. TI explicitly states that its products are "neither designed nor intended for use in automotive applications unless specifically designated as compliant with ISO/TS 16949 requirements." The SN74ALVCH16344DLR appears only in industrial-grade ordering tables with -40°C to +85°C rating and no automotive stress-test documentation. For automotive memory interfaces, TI recommends AEC-Q100-qualified alternatives like SN74LVC16344-Q1. Using SN74ALVCH16344DLR in safety-critical vehicle systems voids TI's warranty and violates functional safety requirements.

SN74ALVCH16344DLR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ALVCH

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Address Driver

Number of Elements:: 4

Number of Bits per Element:: 2:8

Input Type:: -

Output Type:: 3-State

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

SN74ALVCH16344DLR FAQ

1.How can I place an order for SN74ALVCH16344DLR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ALVCH16344DLR 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 SN74ALVCH16344DLR reliable?

The price and inventory of SN74ALVCH16344DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16344DLR is usually 5 days.

3.What payment methods are accepted for SN74ALVCH16344DLR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVCH16344DLR transactions.

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4.How is shipping managed for SN74ALVCH16344DLR?

SN74ALVCH16344DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ALVCH16344DLR 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 SN74ALVCH16344DLR?

For technical support, including SN74ALVCH16344DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16344DLR requirements.

6.How does Aetrix verify that SN74ALVCH16344DLR is sourced from the original manufacturer or authorized distributors?

All SN74ALVCH16344DLR 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 SN74ALVCH16344DLR meets industry standards.

7.What is the process for return or replacement of SN74ALVCH16344DLR?

All SN74ALVCH16344DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16344DLR, 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 SN74ALVCH16344DLR part is unused and in its original packaging.

Return procedure for SN74ALVCH16344DLR:

1.Submit a request within 90 days.

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

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