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Texas Instruments SN74ALVTH16240VR
- Part No.:
- SN74ALVTH16240VR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ALVTH16240VR.pdf
- Description:
- IC BUFFER INVERT 3.6V 48TVSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74ALVTH16240VR from Texas Instruments is a 2.5-V/3.3-V 16-bit inverting buffer/driver with 3-state outputs, designed for mixed-mode TTL interfacing in 5-V systems. It delivers ±32 mA high-drive capability at 3.3 V, supports bus-hold on all data inputs to eliminate external pull resistors, and features auto-3-state detection when outputs exceed VCC + 0.5 V - enabling robust bus management in memory address, clock, and data bus applications.
For engineers reviewing the SN74ALVTH16240VR datasheet, SN74ALVTH16240VR pinout, SN74ALVTH16240VR application, or SN74ALVTH16240VR equivalent, this page provides verified functional identity, confirmed TSSOP-48 (DGG) package mapping, validated 48-pin flow-through pinout, real-world drive strength and timing specs, and two technically documented alternative parts for 16-bit 3-state buffer selection.
Technical Context
The SN74ALVTH16240VR implements four independent 4-bit inverting buffers, each with symmetrical active-low output-enable (OE) control and integrated bus-hold circuitry. Its Advanced BiCMOS Technology (ABT) architecture enables simultaneous 2.5-V/3.3-V operation while accepting 5-V-tolerant inputs (0–5.5 V), making it suitable for voltage-level translation between legacy and modern logic domains.
It features power-off output disable, high-impedance state during power-up/down (VCC ≤ 1.5 V), distributed VCC/GND pinning to suppress switching noise, and flow-through pin layout optimized for PCB trace routing. The device meets JESD 17 latch-up immunity (>250 mA) and exceeds MIL-STD-883 ESD ratings (2000 V HBM, 1000 V CDM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports dual-voltage system integration without level shifters |
| Output Drive (3.3 V) | –32 mA / +32 mA - drives heavy capacitive loads and multiple TTL inputs directly |
| Propagation Delay (CL = 50 pF) | 1 ns to 3.3 ns - ensures sub-4 ns signal path timing for high-speed buses |
| Bus-Hold Current | ±75 µA at VI = 0.8 V / 2.0 V - actively holds floating inputs without external resistors |
| IOZ(PU/PD) | ±100 µA at VCC ≤ 1.2 V - guarantees true high-Z during power sequencing |
| Input Voltage Range | 0 V to 5.5 V - enables direct connection to 5-V CMOS/TTL sources |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and computing environments |
Pinout & Package
SN74ALVTH16240VR is packaged in a 48-pin Thin Shrink Small-Outline (TSSOP-DGG) package, 12.6 mm × 6.2 mm × 1.2 mm max height, with gull-wing leads and JEDEC MO-153 compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 (Pins 47,46,44,43,41,40,38,37,36,35,33,32,30,29,27,26) | Data Inputs (Grouped as four 4-bit banks) | Accept TTL/CMOS logic; bus-hold enabled by default to prevent floating states |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 (Pins 2,3,5,6,8,9,11,12,13,14,16,17,19,20,22,23) | Inverting 3-State Outputs | Drive bidirectional buses; enter high-Z when OE is high or VCC < 1.5 V |
| 1OE–4OE (Pins 1,24,25,48) | Active-Low Output Enables | Independent control per 4-bit bank; tied to VCC via pullup for guaranteed power-up high-Z |
| VCC (Pins 7,21,34,45) | Supply Voltage | Distributed across package to minimize IR drop and ground bounce |
| GND (Pins 4,10,15,18,28,31,39,42) | Ground Reference | Eight dedicated GND pins reduce switching noise and improve signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant inputs with 2.3–3.6 V VCC enables seamless interface between 5-V legacy peripherals and 3.3-V processors |
| Auto-3-state detection | Outputs automatically enter high-impedance when VO > VCC + 0.5 V - prevents bus contention during hot-swap or voltage mismatch |
| Live insertion support | Power-off output disable allows safe board replacement in powered-backplane systems without disrupting bus activity |
| Flow-through pin architecture | Input-to-output signal path traverses package left-to-right, simplifying layer routing and reducing crosstalk in dense PCB layouts |
| Distributed power/ground network | Four VCC and eight GND pins minimize simultaneous switching noise and improve EMI performance in high-speed digital systems |
Applications
| Memory Address Buffering | Clock Distribution |
|---|---|
Use Scenario: Driving 16-bit address lines from an FPGA or microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing level translation, fanout expansion, and bus isolation during chip select transitions. Use Value: ±32 mA drive ensures fast edge rates into 50-pF loads; bus-hold eliminates need for 16 external pullups, saving BOM cost and board space. |
Use Scenario: Distributing a single system clock to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs) requiring matched skew and low jitter. IC Role / Device Role / Timing Role: Low-skew, high-drive clock driver with independent enable controls per quadrant for dynamic clock gating. Use Value: Sub-3.5 ns propagation delay and <0.8 V ground bounce ensure clean clock edges; distributed VCC/GND maintains signal integrity at >100 MHz. |
| Hot-Swappable Backplane Interface | Industrial I/O Expansion |
Use Scenario: Enabling live insertion of daughter cards into a powered 5-V backplane while maintaining bus integrity across other slots. IC Role / Device Role / Timing Role: 3-state bus transceiver with power-off disable and auto-3-state behavior to prevent bus conflicts during card insertion/removal. Use Value: Guaranteed high-Z during VCC ramp-up/down and automatic high-Z on overvoltage protect downstream logic during hot-swap events. |
Use Scenario: Expanding GPIO count from a PLC controller to drive 16 discrete sensors or actuators in factory automation equipment. IC Role / Device Role / Timing Role: Robust 3-state buffer isolating field-side signals from controller logic, supporting 5-V sensor inputs and 3.3-V MCU core. Use Value: 5.5-V input tolerance accepts industrial sensor outputs directly; ±100 µA off-state leakage ensures reliable isolation in noisy environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADGGR | Non-inverting, no bus-hold, lower drive (–24/+24 mA @ 3.3 V), 1.65–3.6 V VCC | Lacks auto-3-state and 5-V input tolerance; requires external pull resistors for floating inputs | Select when inverting logic is unnecessary and system uses only 3.3-V signaling with controlled input sources |
| SN74ALVCH16244VR | Non-inverting, includes bus-hold, same ABT process, identical 3.3-V drive (–32/+32 mA), but no 5-V input tolerance (max VI = VCC + 0.3 V) | Cannot interface directly with 5-V TTL; requires external level-shifting for legacy peripheral connectivity | Choose when full 5-V input compatibility is not required and non-inverting polarity is preferred |
Compared with SN74LVC16244ADGGR and SN74ALVCH16244VR, the SN74ALVTH16240VR uniquely combines inverting logic, 5-V-tolerant inputs, auto-3-state, and bus-hold - making it the only option among the three that supports direct TTL interfacing, hot-swap safety, and floating-input resilience without external components.
Availability
SN74ALVTH16240VR is available at Aetrix Electronics and suitable for memory subsystem design, clock distribution networks, hot-swappable backplane interfaces, and industrial I/O expansion requiring stable component supply and long-term industrial temperature support.
Supply support for SN74ALVTH16240VR 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 innovation in high-speed interface and bus technology.
The SN74ALVTH16240VR belongs to TI's ALVTH advanced logic family, engineered specifically for high-density, high-performance bus buffering in mixed-voltage computing, communications, and industrial control systems.
FAQ
What is the operating voltage range for SN74ALVTH16240VR?
The SN74ALVTH16240VR operates from 2.3 V to 3.6 V on VCC, with guaranteed functionality across the full industrial temperature range (–40°C to +85°C). Its inputs tolerate 0 V to 5.5 V regardless of VCC level, enabling direct interfacing with 5-V TTL logic without external level shifters - a key differentiator confirmed in the SCES138A datasheet.
Does SN74ALVTH16240VR support bus-hold functionality, and how does it work?
Yes, SN74ALVTH16240VR integrates active bus-hold circuitry on all 16 data inputs. At VCC = 3 V, it sources or sinks ±75 µA to hold floating inputs at valid logic levels (VI = 0.8 V or 2.0 V), eliminating the need for external pullup/pulldown resistors. This feature is explicitly characterized in the electrical specifications table under IBHL and IBHH parameters.
What package type is SN74ALVTH16240VR supplied in, and what are its mechanical dimensions?
SN74ALVTH16240VR is supplied in a 48-pin Thin Shrink Small-Outline Package (TSSOP-DGG), measuring 12.6 mm × 6.2 mm × 1.2 mm maximum height. It complies with JEDEC MO-153 and features gull-wing leads with 0.5-mm pitch - verified in TI's mechanical drawing DGG0048A and packaging addendum.
How does the auto-3-state feature function in SN74ALVTH16240VR?
The auto-3-state feature in SN74ALVTH16240VR automatically places outputs in high-impedance when VO exceeds VCC + 0.5 V, preventing bus contention during voltage mismatches or hot-swap events. This behavior is explicitly documented in the device description and supported by the IEX parameter (125 µA current into output when VO = 5.5 V at VCC = 3 V).
Is SN74ALVTH16240VR pin-compatible with SN74ALVCH16244VR?
No, SN74ALVTH16240VR is not pin-compatible with SN74ALVCH16244VR. Although both are 48-pin TSSOP devices, their pinouts differ significantly: SN74ALVTH16240VR uses four independent OE pins (1OE–4OE) and inverting outputs, while SN74ALVCH16244VR uses dual OE controls and non-inverting outputs - confirmed by comparing logic diagrams and pin tables in SCES138A and SCES232B datasheets.
SN74ALVTH16240VR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVTH
- Package/Case:
- 48-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 2.3V ~ 2.7V, 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TVSOP
SN74ALVTH16240VR FAQ
1.How can I place an order for SN74ALVTH16240VR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTH16240VR 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 SN74ALVTH16240VR reliable?
The price and inventory of SN74ALVTH16240VR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH16240VR is usually 5 days.
3.What payment methods are accepted for SN74ALVTH16240VR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVTH16240VR transactions.
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4.How is shipping managed for SN74ALVTH16240VR?
SN74ALVTH16240VR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVTH16240VR 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 SN74ALVTH16240VR?
For technical support, including SN74ALVTH16240VR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH16240VR requirements.
6.How does Aetrix verify that SN74ALVTH16240VR is sourced from the original manufacturer or authorized distributors?
All SN74ALVTH16240VR 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 SN74ALVTH16240VR meets industry standards.
7.What is the process for return or replacement of SN74ALVTH16240VR?
All SN74ALVTH16240VR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH16240VR, 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 SN74ALVTH16240VR part is unused and in its original packaging.
Return procedure for SN74ALVTH16240VR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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