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Texas Instruments SN74AHC16240DL
- Part No.:
- SN74AHC16240DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74AHC16240DL.pdf
- Description:
- IC BUFFER INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,194
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Product details
Overview
SN74AHC16240DL from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for memory address and bus interface applications. It operates from 2 V to 5.5 V, supports –40°C to 85°C industrial temperature range, delivers ±8 mA output drive at 5 V, and features distributed VCC/GND pins to suppress high-speed switching noise.
For engineers reviewing the SN74AHC16240DL datasheet, SN74AHC16240DL pinout, SN74AHC16240DL application, or SN74AHC16240DL equivalent, key selection considerations include its 48-pin SSOP (DL) package, symmetrical active-low OE inputs per 4-bit section, flow-through pinout for optimized PCB layout, and latch-up immunity exceeding 250 mA per JESD 17.
Technical Context
The SN74AHC16240DL implements four independent 4-bit inverting buffers, each with dedicated active-low output-enable (OE) control. Its EPIC™ CMOS process enables rail-to-rail output swing and low dynamic power consumption while maintaining TTL-compatible input thresholds.
Each buffer section accepts standard CMOS logic inputs and drives 3-state outputs with propagation delays as low as 3.6 ns (tPLH/tPHL) at VCC = 5 V and CL = 15 pF. The device uses distributed power/ground pins and flow-through architecture to minimize crosstalk and ground bounce in high-density bus systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports mixed-voltage system interfacing and battery-backed operation down to 2 V |
| Output Drive | ±8 mA at VCC = 5 V - sufficient to drive 50-pF loads with <10 ns propagation delay and maintain signal integrity on stubbed buses |
| Propagation Delay | 3.6 ns (min) at 5 V - enables reliable operation in 100+ MHz address/data bus timing windows |
| 3-State Enable/Disable | tPZH/tPLZ ≤ 8.5 ns at 5 V - ensures fast bus turnaround and minimal contention window during direction switching |
| Input Thresholds | VIH = 3.85 V, VIL = 1.65 V at VCC = 5.5 V - provides >1.3 V noise margin against EMI in industrial environments |
| Latch-Up Immunity | >250 mA per JESD 17 - eliminates risk of destructive latch-up during hot-swap or transient overvoltage events |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded controllers, PLC I/O modules, and test equipment |
Pinout & Package
SN74AHC16240DL is housed in a 48-pin Shrink Small-Outline Package (SSOP, DL), 12.6 mm × 6.1 mm body size, 0.5 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant, with gull-wing leads and exposed thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output-enable control for each 4-bit section | Independent gating allows partial bus isolation without disabling entire 16-bit path; OE tied to VCC via pullup ensures Hi-Z at power-up |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Buffer input terminals (16 total) | Inverting logic inputs - each A group maps directly to corresponding Y outputs with polarity inversion |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Inverting 3-state output terminals (16 total) | Outputs enter high-impedance state when respective OE is high; capable of driving transmission lines or parallel bus stubs |
| VCC (Pins 7, 18, 31, 42) | Distributed supply connections | Four VCC pins reduce simultaneous switching noise and improve PSRR across wide frequency spectrum |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Distributed ground connections | Eight GND pins provide low-inductance return paths, critical for maintaining signal integrity at >50 MHz edge rates |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout architecture | Input and output pins arranged on opposite sides of package to eliminate layer jumps and reduce trace length by up to 40% in dense PCB layouts |
| Distributed VCC/GND pinning | Four VCC and eight GND pins minimize ground bounce and supply droop during 16-bit simultaneous switching |
| EPIC™ process technology | Enhanced-Performance Implanted CMOS delivers 50% lower dynamic power vs. standard AHC, with improved noise immunity and ESD tolerance |
| Symmetrical active-low OE inputs | Four independent OE controls enable granular bus partitioning - e.g., isolate memory address vs. data lanes without redesign |
| Rail-to-rail output swing | VOH ≥ 4.4 V and VOL ≤ 0.1 V at VCC = 4.5 V ensure full logic-level compatibility with downstream 5-V TTL and CMOS receivers |
Applications
| Memory Address Buffering | Industrial Bus Transceiver |
|---|---|
Use Scenario: Driving 16-bit address lines from microcontroller to SRAM or Flash memory in programmable logic controllers. IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating CPU address bus from memory array; enables shared bus access between multiple masters. Use Value: Propagation delay ≤6.5 ns at 5 V ensures setup/hold timing margins are preserved even with 15-pF trace capacitance and 20-MHz clock domains. | Use Scenario: Level-shifting and bus-driving between 3.3-V FPGA I/O banks and legacy 5-V peripheral interfaces in factory automation hardware. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent OE control per 4-bit segment, supporting time-multiplexed read/write cycles. Use Value: ±8 mA drive strength sustains signal integrity across 10-cm backplane traces; 2-V to 5.5-V operation eliminates need for external level shifters. |
| Clock Distribution Fanout | Test Equipment Signal Conditioning |
Use Scenario: Distributing a single system clock to multiple synchronous logic blocks (e.g., ADC, DAC, FIFO) in medical imaging subsystems. IC Role / Device Role / Timing Role: Low-skew inverting buffer providing matched delay paths and impedance-controlled outputs for clock tree balancing. Use Value: Output-to-output skew (tsk(o)) ≤1 ns at 50-pF load ensures <0.5% duty-cycle distortion across all 16 outputs - critical for jitter-sensitive sampling clocks. | Use Scenario: Conditioning digital stimulus signals in automated test equipment (ATE) before applying to DUT under test with variable voltage thresholds. IC Role / Device Role / Timing Role: Programmable 3-state driver enabling dynamic reconfiguration of test vector routing without physical rework. Use Value: Four independent OE inputs allow real-time segmentation of 16-bit pattern generator outputs - reducing test cycle time by 30% in multi-DUT parallel testing. |
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 |
|---|---|---|---|
| SN74AHCT16240DL | TTL-compatible input thresholds (VIH = 2 V min), otherwise identical pinout, timing, and drive capability | Better suited for mixed 5-V TTL/CMOS systems where input noise immunity must match legacy TTL logic families | Select SN74AHCT16240DL when interfacing directly to 74LS or 74F series outputs without level translation |
| SN74LVC16244ADL | Non-inverting outputs, 3.3-V only (1.65–3.6 V), higher speed (tPD = 2.8 ns), lower drive (±24 mA) | Optimized for modern low-voltage FPGA/CPU I/O interfaces; lacks 5-V tolerance and inverting logic function | Choose SN74LVC16244ADL only in pure 3.3-V domains requiring non-inverting buffering and tighter timing budgets |
Compared with SN74AHCT16240DL and SN74LVC16244ADL, the SN74AHC16240DL uniquely balances 2–5.5 V operation, inverting logic, and industrial temperature support - making it the only option for legacy 5-V bus expansion in extended-temperature embedded systems.
Availability
SN74AHC16240DL is available at Aetrix Electronics and suitable for industrial control systems, test instrumentation, and memory interface designs requiring stable component supply across long production lifecycles and temperature extremes.
Supply support for SN74AHC16240DL 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 90 years of innovation in industrial, automotive, and communications markets.
The SN74AHC16240DL belongs to TI's Widebus™ family of high-density bus-interface ICs, engineered specifically for noise-resilient, high-speed memory addressing and data-path buffering in space-constrained industrial electronics.
FAQ
What is the maximum operating voltage for SN74AHC16240DL?
The absolute maximum supply voltage for SN74AHC16240DL is 7 V, but the recommended operating range is 2 V to 5.5 V. Operating beyond 5.5 V risks violating recommended conditions and may accelerate parametric drift or reduce long-term reliability. All electrical characteristics in the datasheet are specified within the 2–5.5 V range, and SN74AHC16240DL is fully characterized for DC and AC performance only in this window.
Does SN74AHC16240DL support hot-swap or live-insertion?
SN74AHC16240DL is not explicitly rated for hot-swap operation. While its latch-up immunity exceeds 250 mA per JESD 17 and it features robust ESD protection (2 kV HBM), the absence of power-on reset circuitry or bus-hold inputs means OE must be externally controlled during insertion. To safely implement live insertion, tie all OE pins to VCC through ≥10-kΩ pullup resistors and ensure VCC ramps monotonically - SN74AHC16240DL itself does not guarantee glitch-free enable sequencing.
Can SN74AHC16240DL drive a 50-Ω transmission line directly?
No, SN74AHC16240DL cannot directly drive a 50-Ω transmission line to full logic levels. Its output drive strength (±8 mA at 5 V) corresponds to ~625 Ω effective source impedance, far higher than 50 Ω. Attempting direct termination causes severe signal degradation and violates VOH/VOL specs. For 50-Ω lines, use SN74AHC16240DL as a logic-level translator feeding a dedicated line driver (e.g., SN65LVDS122) or add series termination (33–47 Ω) at the source with proper end termination.
How many independent 3-state sections does SN74AHC16240DL contain?
SN74AHC16240DL contains four independent 3-state sections: Section 1 (pins 47–43, 2–6), Section 2 (pins 41–37, 8–12), Section 3 (pins 36–32, 13–17), and Section 4 (pins 30–26, 19–23). Each section has four inputs (A1–A4), four inverting outputs (Y1–Y4), and one dedicated active-low output-enable (OE) pin. This architecture allows selective activation of 4-, 8-, or 16-bit bus segments without affecting others.
Is SN74AHC16240DL pin-compatible with SN74AHC16244DL?
No, SN74AHC16240DL is not pin-compatible with SN74AHC16244DL. Although both are 48-pin SSOP buffers, SN74AHC16244DL has non-inverting outputs and different pin assignments: its OE pins are located at pins 1 and 48 (shared control), whereas SN74AHC16240DL places individual OE pins at pins 1, 24, 25, and 48. Swapping them would cause functional failure due to inverted logic and misrouted enables - SN74AHC16240DL requires explicit verification of pin mapping before board reuse.
SN74AHC16240DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74AHC16240DL FAQ
1.How can I place an order for SN74AHC16240DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC16240DL 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 SN74AHC16240DL reliable?
The price and inventory of SN74AHC16240DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC16240DL is usually 5 days.
3.What payment methods are accepted for SN74AHC16240DL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC16240DL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHC16240DL?
SN74AHC16240DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC16240DL 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 SN74AHC16240DL?
For technical support, including SN74AHC16240DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC16240DL requirements.
6.How does Aetrix verify that SN74AHC16240DL is sourced from the original manufacturer or authorized distributors?
All SN74AHC16240DL 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 SN74AHC16240DL meets industry standards.
7.What is the process for return or replacement of SN74AHC16240DL?
All SN74AHC16240DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC16240DL, 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 SN74AHC16240DL part is unused and in its original packaging.
Return procedure for SN74AHC16240DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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