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Texas Instruments SN74AHC16240DGVR
- Part No.:
- SN74AHC16240DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHC16240DGVR.pdf
- Description:
- IC BUFFER INVERT 5.5V 48TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,653
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Product details
Overview
SN74AHC16240DGVR from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for high-density memory address and bus-oriented applications. It operates from 2 V to 5.5 V, supports symmetrical active-low output-enable (OE) inputs, and delivers ±8 mA output drive at 5 V. Its flow-through pinout and distributed VCC/GND pins minimize switching noise in high-speed PCB layouts.
For engineers reviewing the SN74AHC16240DGVR datasheet, SN74AHC16240DGVR pinout, SN74AHC16240DGVR application, or SN74AHC16240DGVR equivalent, this page provides verified functional identity, TVSOP-48 package mapping, 16-bit 3-state buffering behavior, propagation delay (≤6.5 ns @ 5 V, 15 pF), and validated alternatives for bus interface upgrades and legacy logic replacement.
Technical Context
The SN74AHC16240DGVR implements four independent 4-bit inverting buffers, each with dedicated active-low OE control (1OE–4OE). All outputs enter high-impedance state when corresponding OE is high, enabling bidirectional bus control without external direction logic.
It uses TI's EPIC™ (Enhanced-Performance Implanted CMOS) process for rail-to-rail input compatibility (VIL = 1.65 V, VIH = 3.85 V @ VCC = 5.5 V) and low dynamic power (Cpd = 10 pF @ 5 V). Latch-up immunity exceeds 250 mA per JESD 17, and absolute max ratings include –0.5 V to 7 V on all I/O pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports mixed-voltage system interfacing (e.g., 3.3 V logic driving 5 V bus) |
| Output Drive | ±8 mA @ VCC = 5 V - sufficient to drive 50-pF loads with <6.5 ns propagation delay |
| tPLH/tPHL | ≤6.5 ns @ VCC = 5 V, CL = 15 pF - enables reliable operation up to ~100 MHz bus toggle rates |
| 3-State Enable/Disable | tPZH/tPHZ ≤8.5 ns @ 5 V - fast bus arbitration with minimal contention window |
| Input Thresholds | VIH = 3.85 V, VIL = 1.65 V @ VCC = 5.5 V - ensures noise margin >0.7 V in 5 V systems |
| Thermal Resistance | θJA = 58 °C/W (DGV package) - allows sustained 16-bit switching at ambient ≤70 °C without forced cooling |
| Operating Temperature | –40 °C to +85 °C - qualified for industrial-grade embedded control and data acquisition systems |
Pinout & Package
SN74AHC16240DGVR is housed in a 48-pin Thin Very Small-Outline Package (TVSOP, DGV), 7.9 mm × 4.4 mm × 1.2 mm body, JEDEC MO-153 compliant, with 0.4 mm pitch and Q1 pin-1 orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable (per 4-bit section) | Independent control of four 4-bit groups; high = high-Z output, low = enabled inverting buffer |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Input terminals (16 total) | CMOS-compatible inputs accepting 0–VCC; unused inputs must be tied to VCC or GND |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Inverting buffered outputs (16 total) | 3-state outputs with symmetrical drive; VOH/VOL specified down to 2 V supply |
| VCC (Pins 7, 18, 28, 39) | Power supply | Distributed VCC pins reduce simultaneous switching noise and improve PDN stability |
| GND (Pins 4, 10, 15, 21, 25, 32, 36, 42) | Ground reference | Eight GND pins interleaved with signals and VCC for low-inductance return paths |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins aligned on opposite sides (e.g., A1/A2 on left, Y1/Y2 on right) - simplifies layer routing and reduces trace crossovers |
| Distributed VCC/GND | Four VCC and eight GND pins placed across the perimeter - lowers ground bounce and improves signal integrity at >50 MHz |
| EPIC™ CMOS process | Guarantees latch-up immunity >250 mA - eliminates risk of destructive latch-up in noisy industrial environments |
| Wide supply range | 2 V to 5.5 V operation - enables direct interface between 2.5 V microcontrollers and 5 V legacy peripherals |
| High-noise-margin thresholds | VIH = 70% VCC, VIL = 30% VCC @ 5.5 V - rejects >0.7 V of coupled noise on address/data buses |
Applications
| Memory Address Buffering | Industrial Bus Transceiver |
|---|---|
|
Use Scenario: Driving 16-bit address lines from an MCU to SRAM or Flash memory in programmable logic controllers. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing level-shifted, noise-immune address propagation with OE-controlled bus release. Use Value: Enables clean address latching during memory access cycles; tPLH ≤6.5 ns ensures setup time compliance for 100 MHz bus clocks. |
Use Scenario: Isolating and driving shared data bus lines between multiple microcontrollers in factory automation nodes. IC Role / Device Role / Timing Role: Bidirectional bus driver with per-section OE control, allowing one node to transmit while others tri-state. Use Value: Eliminates need for external direction logic; fast disable (tPHZ ≤8.5 ns) prevents bus contention during arbitration. |
| Clock Distribution Fanout | Legacy Peripheral Interface |
|
Use Scenario: Distributing a single clock signal to multiple synchronous peripherals (ADCs, DACs, FPGAs) in test equipment. IC Role / Device Role / Timing Role: Low-skew inverting buffer with matched propagation delays across all 16 outputs. Use Value: tsk(o) ≤1 ns ensures phase alignment across fanout paths, critical for multi-channel sampling synchronization. |
Use Scenario: Interfacing modern 3.3 V SoCs to legacy 5 V parallel peripherals (LCD controllers, printer ports). IC Role / Device Role / Timing Role: Voltage-tolerant buffer translating logic levels while maintaining timing integrity and bus isolation. Use Value: 2 V–5.5 V VCC range and 5.5 V-tolerant inputs allow safe 3.3 V → 5 V level shifting without external components. |
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 |
|---|---|---|---|
| SN74LVCH16244ADGGR | Non-inverting, 3.3 V only (1.65–3.6 V), higher drive (±24 mA), lower tPD (≤3.8 ns) | Requires level-shifting for 5 V buses; better suited for high-speed 3.3 V-only systems | Select when replacing 3.3 V ASIC interfaces needing non-inverting logic and tighter timing margins. |
| 74AC16240PCB | Through-hole PDIP-48, same inverting function, wider VCC (2–6 V), slower (tPD ≤10 ns @ 5 V) | Used in legacy prototyping, repair, or through-hole production where reflow isn't available | Select for hand-soldered development boards or field-replacement of aging DIP-based controllers. |
Compared with SN74LVCH16244ADGGR and 74AC16240PCB, the SN74AHC16240DGVR uniquely balances wide-voltage operation (2–5.5 V), inverting logic, TVSOP space savings, and industrial temperature support-making it optimal for mixed-voltage industrial upgrades where board real estate and legacy compatibility are critical.
Availability
SN74AHC16240DGVR is available at Aetrix Electronics and suitable for industrial control panels, automated test equipment, and embedded data acquisition systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SN74AHC16240DGVR 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 over 50 years of innovation in high-reliability logic families.
The SN74AHC16240DGVR belongs to TI's AHC logic family-designed for low-power, high-speed 3-state buffering in memory, bus, and clock distribution systems where noise immunity and voltage flexibility are essential.
FAQ
What is the recommended power-up sequence for SN74AHC16240DGVR to avoid bus contention?
TI recommends tying all OE inputs to VCC via a pullup resistor (value determined by driver sink capability) during power-up and power-down. This ensures outputs remain in high-impedance state until system logic asserts valid OE control. For SN74AHC16240DGVR, this prevents unintended drive on shared buses before firmware initialization completes.
Does SN74AHC16240DGVR support hot insertion into a live 5 V bus?
No-SN74AHC16240DGVR is not hot-swap rated. Its absolute maximum input voltage is 7 V, but IOK is limited to ±20 mA. Live insertion risks exceeding clamp current during pin engagement transients. Use dedicated hot-swap controllers or series resistors if live insertion is required in the system design.
Can SN74AHC16240DGVR be used as a non-inverting buffer?
No-SN74AHC16240DGVR provides only inverting logic (Y = NOT A). To implement non-inverting buffering, two cascaded sections would be needed (e.g., A → 1Y → 2A → 2Y), consuming 8 pins and adding 2× propagation delay. For non-inverting operation, TI recommends SN74AHC16244DGVR instead.
What is the maximum capacitive load SN74AHC16240DGVR can drive while maintaining timing specs?
SN74AHC16240DGVR is characterized up to 50 pF load capacitance. At VCC = 5 V, tPLH/tPHL remains ≤8.5 ns and tPHZ/tPZH ≤10.5 ns under this condition. Driving >50 pF will increase delay nonlinearly and may violate setup/hold windows in high-speed interfaces-add series termination or buffer fanout if load exceeds spec.
How does the DGV package of SN74AHC16240DGVR compare thermally to the DGG variant?
SN74AHC16240DGVR (DGV) has θJA = 58 °C/W, versus 70 °C/W for the DGG package. The thinner profile and optimized thermal pad layout of the TVSOP package yield ~17% lower junction-to-ambient resistance, allowing higher sustained output current or operation in warmer ambient conditions without derating.
SN74AHC16240DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 48-TFSOP (0.173", 4.40mm 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TVSOP
SN74AHC16240DGVR FAQ
1.How can I place an order for SN74AHC16240DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC16240DGVR 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 SN74AHC16240DGVR reliable?
The price and inventory of SN74AHC16240DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC16240DGVR is usually 5 days.
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Once your SN74AHC16240DGVR 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 SN74AHC16240DGVR?
For technical support, including SN74AHC16240DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC16240DGVR requirements.
6.How does Aetrix verify that SN74AHC16240DGVR is sourced from the original manufacturer or authorized distributors?
All SN74AHC16240DGVR 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 SN74AHC16240DGVR meets industry standards.
7.What is the process for return or replacement of SN74AHC16240DGVR?
All SN74AHC16240DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC16240DGVR, 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 SN74AHC16240DGVR part is unused and in its original packaging.
Return procedure for SN74AHC16240DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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