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Texas Instruments SN74LVCH16240ADLR
- Part No.:
- SN74LVCH16240ADLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVCH16240ADLR.pdf
- Description:
- IC BUFFER INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:890
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Product details
Overview
SN74LVCH16240ADLR 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, supporting mixed-mode 5-V input/3.3-V VCC interfacing and featuring bus-hold on all data inputs. It delivers 4.2 ns max propagation delay at 3.3 V and supports partial-power-down via Ioff.
For engineers reviewing the SN74LVCH16240ADLR datasheet, SN74LVCH16240ADLR pinout, SN74LVCH16240ADLR application, or SN74LVCH16240ADLR equivalent, key selection criteria include 48-pin SSOP (DL) package compatibility, active-low 3-state enable logic per 4-bit group, bus-hold functionality eliminating external resistors, and ±24 mA drive strength at 3 V.
Technical Context
This device implements four independent 4-bit inverting buffers, each with symmetrical active-low output-enable (OE) control (1OE–4OE), enabling flexible partitioning as one 16-bit, two 8-bit, or four 4-bit drivers. All inputs tolerate up to 5.5 V regardless of VCC level, enabling robust level translation in mixed-voltage systems.
The integrated bus-hold circuitry actively maintains valid logic states on undriven inputs without external pullup/pulldown resistors, while the Ioff feature disables outputs during power-down to prevent backflow current-critical for hot-swap and partial-power-down applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across low-voltage logic families including 1.8-V, 2.5-V, and 3.3-V systems. |
| Max tpd | 4.2 ns at VCC = 3.3 V - Ensures high-speed timing integrity in memory address and clock distribution paths. |
| Ioff Current | ±10 µA at VI/VO = 5.5 V - Guarantees safe isolation during partial power-down without damaging current flow. |
| Bus-Hold Input Current | ±45 µA at VCC = 2.3 V - Maintains stable logic levels on floating inputs without external components. |
| Output Drive | ±24 mA at VCC = 3 V - Supports direct interface to multiple CMOS loads or moderate-capacitance buses. |
| Input Voltage Tolerance | 0 V to 5.5 V - Allows reliable interfacing with legacy 5-V peripherals while powered from 3.3-V rails. |
| ESD Rating | 2000-V HBM, 200-V MM, 1000-V CDM - Meets industrial-grade robustness requirements per JESD22. |
Pinout & Package
SN74LVCH16240ADLR uses a 48-pin SSOP (DL) package with 0.5-mm pitch, 12.4 mm × 6.0 mm body size, and 1.2-mm max height. Pin 1 is located at top-left corner with quadrants aligned per JEDEC MO-153.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE | Active-low output enable | Controls 3-state output for corresponding 4-bit group; must be pulled high via resistor during power-up to ensure Hi-Z default. |
| 1A1–4A4 | Data inputs (16 total) | Inverting inputs accepting 0–5.5 V; bus-hold enabled by default to retain last valid state when un-driven. |
| 1Y1–4Y4 | Inverting 3-state outputs (16 total) | Drive complementary logic of inputs when OE is low; enter high-impedance state when OE is high. |
| VCC | Power supply | Single 1.65–3.6 V rail powers entire device; decoupling required near pins 24 and 48 per layout guidelines. |
| GND | Ground reference | Eight dedicated ground pins (pins 4, 9, 14, 19, 27, 32, 37, 42) minimize ground bounce and improve noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage translation | Accepts 5-V inputs while operating at 3.3-V VCC-enables seamless interconnection between legacy 5-V logic and modern low-voltage subsystems. |
| Integrated bus-hold | Eliminates need for 10-kΩ external pullup/pulldown resistors on all 16 data inputs, reducing BOM count and PCB area. |
| Partial-power-down support | Ioff limits off-state current to ±10 µA even when VCC = 0 V and inputs/outputs are biased to 5.5 V-essential for hot-plug and power-gated designs. |
| Low ground bounce (VOLP) | Typical <0.8 V at VCC = 3.3 V - reduces switching noise coupling into sensitive analog sections sharing same ground plane. |
| Symmetrical OE architecture | Four independent active-low enables allow granular control over 4-bit segments-supports dynamic bus segmentation and power gating per channel. |
Applications
| Memory Address Buffering | Clock Distribution |
|---|---|
Use Scenario: Driving address lines from a low-voltage microcontroller to multiple 5-V SRAM chips in an embedded industrial controller. IC Role / Device Role / Timing Role: Inverting 16-bit buffer translating 3.3-V address signals to 5-V-compatible levels while maintaining setup/hold timing margins. Use Value: Eliminates discrete level shifters and pullup networks, reducing component count and signal skew across parallel address bus. | Use Scenario: Distributing a system clock to multiple 3.3-V peripheral ICs with varying capacitive loading and timing sensitivity. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer providing clean, slew-controlled clock edges with sub-5 ns propagation delay. Use Value: Ensures deterministic clock arrival across 16 outputs, minimizing jitter accumulation and meeting tight setup/hold windows. |
| Hot-Swappable Backplane Interface | Mixed-Voltage Bus Transceiver |
Use Scenario: Enabling/disabling communication lanes on a modular backplane where cards may be inserted or removed while main power remains active. IC Role / Device Role / Timing Role: 3-state driver isolating card-side signals during insertion; Ioff prevents backfeed into unpowered modules. Use Value: Guarantees safe hot-swap operation without requiring complex power sequencing or external isolation FETs. | Use Scenario: Interfacing a 5-V sensor hub to a 3.3-V host processor in an IoT edge node with space-constrained PCB layout. IC Role / Device Role / Timing Role: Bidirectional voltage translator handling both input sensing and output control signals across voltage domains. Use Value: Replaces dual-rail translators and discrete logic, simplifying routing and eliminating level-shifter propagation delay asymmetry. |
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 |
|---|---|---|---|
| SN74LVC16240ADLR | Lacks bus-hold and Ioff; operates only up to 3.6 V but does not support 5-V tolerant inputs. | Requires external pullups and cannot safely interface with 5-V sources-unsuitable for mixed-voltage systems. | Select only if cost sensitivity outweighs need for 5-V tolerance and power-down safety. |
| 74ALVC16240PW,118 | NXP part with identical 48-pin TSSOP (DH) package, 1.65–3.6 V range, and 5-V tolerant inputs-but no bus-hold circuitry. | Needs external termination resistors; lower ESD rating (1500-V HBM vs. TI's 2000-V). | Prefer when footprint compatibility with TSSOP is required and bus-hold is managed externally. |
Compared with SN74LVC16240ADLR and 74ALVC16240PW,118, SN74LVCH16240ADLR uniquely combines 5-V input tolerance, integrated bus-hold, and Ioff-making it the only option among the three qualified for unbuffered mixed-voltage hot-swap interfaces without additional support components.
Availability
SN74LVCH16240ADLR is available at Aetrix Electronics and suitable for memory address buffering, clock distribution, hot-swappable backplane interfaces, and mixed-voltage bus transceivers requiring stable component supply across industrial temperature ranges.
Supply support for SN74LVCH16240ADLR 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 for industrial, automotive, and personal electronics markets.
The SN74LVCH16240ADLR belongs to TI's Widebus™ family-designed specifically to enhance performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers/transmitters in space-constrained, mixed-voltage systems.
FAQ
What is the recommended power-up sequence for SN74LVCH16240ADLR to avoid output contention?
TI specifies that OE inputs must be held high (via pullup resistor to VCC) during power-up to guarantee outputs remain in high-impedance state until VCC stabilizes. For SN74LVCH16240ADLR, use ≥10-kΩ pullup on each OE line; minimum value depends on driver sink capability. Do not tie OE directly to GND or leave floating-this could cause bus conflicts before system initialization completes.
Does SN74LVCH16240ADLR support true bidirectional data flow like a transceiver?
No-SN74LVCH16240ADLR is a unidirectional inverting buffer with fixed input (A) and output (Y) terminals. It does not auto-detect direction or share pins for I/O; each of the 16 channels flows strictly from A to Y. For bidirectional operation, separate transmit/receive buffers or a dedicated transceiver such as SN74LVC8T245 must be used alongside SN74LVCH16240ADLR.
Can SN74LVCH16240ADLR be used with a 1.8-V supply while driving 5-V-tolerant loads?
Yes-SN74LVCH16240ADLR operates down to 1.65 V and maintains 5-V input tolerance regardless of VCC level. When powered at 1.8 V, its outputs swing rail-to-rail (0 V to 1.8 V), which is sufficient to meet VIH/VIL thresholds of many 5-V CMOS loads (e.g., VIH ≥ 3.5 V is not required-only that the driven device interprets 1.8 V as valid HIGH, which most 5-V tolerant inputs do per their datasheets). Confirm load-specific input thresholds before deployment.
How does the bus-hold feature behave when an input is actively driven versus floating?
When an input to SN74LVCH16240ADLR is actively driven (e.g., by another logic gate), the bus-hold circuit is overridden and has no effect-the input follows the applied signal. When the input floats (high-impedance source), bus-hold engages automatically, latching the last valid logic state with ±45 µA holding current at 2.3 V VCC. TI explicitly warns against using external pullup/pulldown resistors with bus-hold enabled, as they conflict and degrade noise margin.
Is SN74LVCH16240ADLR pin-compatible with SN74LVCH16240ADGGR?
No-SN74LVCH16240ADLR uses SSOP (DL) package with 48 pins and 0.5-mm pitch, while SN74LVCH16240ADGGR uses TSSOP (DGG) package with identical pin count but different mechanical dimensions, land pattern, and thermal characteristics. Though functionally identical and electrically compatible, they require separate PCB footprints and reflow profiles; neither is a drop-in replacement for the other without board redesign.
SN74LVCH16240ADLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
SN74LVCH16240ADLR FAQ
1.How can I place an order for SN74LVCH16240ADLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCH16240ADLR 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 SN74LVCH16240ADLR reliable?
The price and inventory of SN74LVCH16240ADLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCH16240ADLR is usually 5 days.
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SN74LVCH16240ADLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCH16240ADLR 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 SN74LVCH16240ADLR?
For technical support, including SN74LVCH16240ADLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH16240ADLR requirements.
6.How does Aetrix verify that SN74LVCH16240ADLR is sourced from the original manufacturer or authorized distributors?
All SN74LVCH16240ADLR 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 SN74LVCH16240ADLR meets industry standards.
7.What is the process for return or replacement of SN74LVCH16240ADLR?
All SN74LVCH16240ADLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH16240ADLR, 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 SN74LVCH16240ADLR part is unused and in its original packaging.
Return procedure for SN74LVCH16240ADLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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