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Texas Instruments SN74ALVCH16240DL
- Part No.:
- SN74ALVCH16240DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVCH16240DL.pdf
- Description:
- IC BUFFER INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,082
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Product details
Overview
SN74ALVCH16240DL from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation. It features four independent 4-bit sections, each with active-low output-enable (OE) control, bus-hold circuitry on all data inputs, and symmetrical propagation delay (tpd ≤ 5.3 ns at VCC = 2.5 V). It is used in memory address buffering, clock distribution, and high-density bus interfacing in industrial and embedded systems.
For engineers reviewing the SN74ALVCH16240DL datasheet, SN74ALVCH16240DL pinout, SN74ALVCH16240DL application, or SN74ALVCH16240DL equivalent, key selection criteria include its 48-pin SSOP (DL) package, -40°C to 85°C operating range, ±24 mA output drive capability at 3 V, bus-hold input retention, and compatibility with mixed-voltage LVTTL/ALVC logic families.
Technical Context
This device implements four independent 4-bit inverting buffers, each with dedicated active-low OE control (1OE–4OE), enabling granular bus isolation. All 16 data inputs feature integrated bus-hold circuitry-eliminating external pullup/pulldown resistors-and support 1.65-V to 3.6-V supply operation with VIH/VIL thresholds scaled to VCC.
Output switching is characterized by matched enable/disable timing: tdis ≤ 5.4 ns and ten ≤ 6.4 ns (VCC = 2.5 V), while propagation delay tpd remains ≤ 5.3 ns across all voltage rails. The design complies with JESD 17 latch-up immunity (>250 mA) and exceeds 2000-V HBM ESD protection per MIL-STD-883.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports mixed-voltage system interfacing and low-power operation down to 1.65 V. |
| Output Drive | ±24 mA at VCC = 3 V - sufficient to drive 50-pF loads with fast edge rates in dense PCB layouts. |
| Propagation Delay | ≤5.3 ns at VCC = 2.5 V - ensures tight timing alignment across 16-bit data paths in high-speed address or control buses. |
| Bus-Hold Current | ±75 µA at VCC = 3 V - actively retains valid logic state on floating inputs without external components. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded and automation applications. |
| IOZ (Off-State Leakage) | ±10 µA at VCC = 3.6 V - minimizes power loss and signal crosstalk when outputs are in high-impedance state. |
| Input Capacitance | 6 pF per data input - reduces capacitive loading on upstream drivers and improves signal integrity. |
Pinout & Package
SN74ALVCH16240DL uses a 48-pin Shrink Small-Outline Package (SSOP, DL), 12.6 mm × 6.2 mm body, 0.5-mm lead pitch, 1.2-mm max height, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE (Pins 1, 24, 25, 48) | Active-low output-enable control | Each enables/disables one 4-bit buffer section; tied high via pullup for safe power-up high-Z state. |
| 1A1–4A4 (Pins 47,46,44,43,41,40,38,37,36,35,33,32,30,29,27,26) | Data inputs | All 16 inputs include bus-hold circuitry; no external biasing required for unused pins. |
| 1Y1–4Y4 (Pins 2,3,5,6,8,9,11,12,13,14,16,17,19,20,22,23) | Inverting buffered outputs | Outputs invert input logic; tri-state when corresponding OE is high; drive ±24 mA at 3 V. |
| VCC (Pins 7, 21, 31, 42) | Power supply | Four distributed VCC pins reduce IR drop and improve noise immunity across wide 16-bit bus. |
| GND (Pins 4, 10, 15, 28, 34, 39) | Ground reference | Six GND pins provide low-inductance return paths and minimize ground bounce in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Bus-hold inputs | Eliminates need for external pullup/pulldown resistors on all 16 A-inputs, reducing BOM count and layout area. |
| Wide VCC range | 1.65 V to 3.6 V operation enables interoperability between 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters. |
| Matched enable/disable timing | ten ≤ 6.4 ns and tdis ≤ 5.4 ns (VCC = 2.5 V) ensure deterministic bus release and acquisition windows. |
| High ESD/latch-up robustness | 2000-V HBM ESD rating and >250 mA latch-up immunity support reliable operation in noisy industrial environments. |
| Distributed power/ground | Four VCC and six GND pins minimize supply impedance and suppress simultaneous switching noise across 16-bit channels. |
Applications
| Memory Address Buffering | Industrial Bus Transceiver |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or flash devices on a shared bus. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing isolation, fanout expansion, and controlled bus release timing. Use Value: Enables clean address decoding with <5.3 ns propagation delay and eliminates external bus-termination resistors via integrated bus-hold. |
Use Scenario: Interfacing PLC I/O modules to a central controller over a noise-prone backplane bus. IC Role / Device Role / Timing Role: Direction-controlled driver/receiver with active-low OE for bidirectional bus arbitration. Use Value: Delivers ±24 mA drive strength and -40°C to +85°C operation for stable signal integrity in harsh factory environments. |
| Low-Voltage Clock Distribution | Embedded System Power Sequencing |
|
Use Scenario: Distributing a 1.8-V system clock to multiple peripherals requiring synchronized enable control. IC Role / Device Role / Timing Role: Inverting buffer with per-section OE allowing staggered clock enable to reduce inrush current. Use Value: Supports 1.65-V minimum VCC and delivers sub-6 ns delay, ensuring jitter-free clock fanout in battery-powered designs. |
Use Scenario: Controlling power-on reset sequencing of multiple voltage rails using GPIO-controlled enable signals. IC Role / Device Role / Timing Role: Logic-level translator and signal conditioner converting MCU GPIO outputs into isolated, high-drive enable signals. Use Value: Bus-hold inputs prevent floating states during MCU boot, and 3-state outputs allow dynamic reconfiguration of enable routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16240ADGGR | Non-bus-hold inputs; 1.65–3.6-V VCC; identical pinout and function but requires external pullups on unused inputs. | Suitable where board space allows discrete biasing or where bus-hold is not required for reliability. | Select when cost sensitivity outweighs need for bus-hold; verify input biasing in floating scenarios. |
| 74ALVCH16244DLR | Non-inverting output polarity; same VCC range, bus-hold, and 48-pin SSOP package; otherwise identical timing and drive. | Used where signal inversion must be avoided in address/data paths or when matching legacy non-inverting designs. | Choose when functional inversion conflicts with system logic; no PCB change needed beyond OE logic adjustment. |
Compared with SN74ALVCH16240DL, SN74LVC16240ADGGR lacks bus-hold (increasing BOM and layout complexity), while 74ALVCH16244DLR provides identical performance with non-inverting outputs-making it a direct functional substitute where polarity matters.
Availability
SN74ALVCH16240DL is available at Aetrix Electronics and suitable for industrial automation, embedded memory subsystems, and low-voltage clock distribution requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74ALVCH16240DL 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 IC design.
The SN74ALVCH16240DL belongs to TI's Widebus™ family of high-density bus-interface logic, engineered specifically to improve timing predictability, noise immunity, and board-level integration in memory, clock, and bus-oriented systems.
FAQ
What is the recommended power-up sequence for SN74ALVCH16240DL?
TI specifies that OE pins must be held high (via pullup resistor to VCC) during power-up to guarantee outputs remain in high-impedance state until VCC stabilizes. For SN74ALVCH16240DL, tie each of pins 1, 24, 25, and 48 to VCC through ≥10-kΩ resistors. This prevents bus contention before system initialization completes.
Does SN74ALVCH16240DL support mixed-voltage operation between inputs and VCC?
Yes - SN74ALVCH16240DL accepts input voltages from 0 V to VCC (VI = 0 to VCC), and its VIH/VIL thresholds scale with VCC (e.g., VIH = 0.65×VCC at 1.65 V). This allows safe interfacing with 1.8-V or 2.5-V drivers while powered from 3.3-V rails, provided VCC remains within 1.65–3.6 V.
How does bus-hold functionality work on SN74ALVCH16240DL inputs?
SN74ALVCH16240DL integrates weak feedback transistors on all 16 A-inputs. When an input floats, the bus-hold circuit sources or sinks up to ±75 µA (at VCC = 3 V) to retain the last-valid logic state. This eliminates external resistors and prevents metastability in unconnected or unterminated traces.
Can SN74ALVCH16240DL replace SN74ALVCH16244DL in a design?
No - SN74ALVCH16240DL provides inverting outputs, while SN74ALVCH16244DL is non-inverting. Swapping them would invert all 16 data bits. However, SN74ALVCH16244DL is a verified pin-compatible alternative if inversion is undesirable; both share identical VCC range, bus-hold, timing, and package.
What thermal considerations apply to SN74ALVCH16240DL in continuous operation?
SN74ALVCH16240DL has a DL-package θJA of 94°C/W. At full 16-bit switching with 24-mA loads, worst-case power dissipation is ~40 mW (ICC) + ~16 mW (IOL-driven), totaling ~56 mW - resulting in <6°C junction rise above ambient. No heatsink is required, but ensure ≥25 mm² copper pour under the package for optimal conduction cooling.
SN74ALVCH16240DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 4
- 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:
- 48-SSOP
SN74ALVCH16240DL FAQ
1.How can I place an order for SN74ALVCH16240DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH16240DL 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 SN74ALVCH16240DL reliable?
The price and inventory of SN74ALVCH16240DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16240DL is usually 5 days.
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Once your SN74ALVCH16240DL 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 SN74ALVCH16240DL?
For technical support, including SN74ALVCH16240DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16240DL requirements.
6.How does Aetrix verify that SN74ALVCH16240DL is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH16240DL 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 SN74ALVCH16240DL meets industry standards.
7.What is the process for return or replacement of SN74ALVCH16240DL?
All SN74ALVCH16240DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16240DL, 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 SN74ALVCH16240DL part is unused and in its original packaging.
Return procedure for SN74ALVCH16240DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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