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Texas Instruments SN74AHC16240DGGR
- Part No.:
- SN74AHC16240DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74AHC16240DGGR.pdf
- Description:
- IC BUFFER INVERT 5.5V 48TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74AHC16240DGGR 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 flow-through pinout for optimized PCB layout in high-density systems.
For engineers reviewing the SN74AHC16240DGGR datasheet, SN74AHC16240DGGR pinout, SN74AHC16240DGGR application, or SN74AHC16240DGGR equivalent, key selection criteria include its 48-pin TSSOP (DGG) package, symmetrical active-low OE control per 4-bit section, guaranteed 3-state isolation (IOZ ≤ ±2.5 µA), and propagation delays as low as 3.6 ns (tPLH/tPHL @ 5 V, 15 pF).
Technical Context
The SN74AHC16240DGGR implements four independent 4-bit inverting buffers, each with dedicated active-low output-enable (OE) inputs - 1OE, 2OE, 3OE, and 4OE - enabling granular bus control. Its EPIC™ CMOS process ensures rail-to-rail output swing and low dynamic power consumption.
It uses distributed VCC and GND pins across the 48-pin TSSOP footprint to suppress simultaneous switching noise, and its flow-through architecture places inputs on one side and outputs on the opposite side - eliminating layer jumps and reducing trace crosstalk in high-speed memory or data bus designs.
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-tolerant loads) |
| Output Drive | ±8 mA @ 5 V - sufficient to drive standard TTL loads or multiple CMOS inputs without external buffering |
| tPLH / tPHL | 3.6 ns min @ 5 V, 15 pF - enables reliable operation in >100 MHz address/data strobe timing windows |
| IOZ (3-State Leakage) | ±2.5 µA max @ 5.5 V - ensures minimal bus contention during disable, critical for hot-swap or multi-master arbitration |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded controllers, PLC I/O modules, and test equipment |
| ESD Rating | Exceeds JESD 17 latch-up immunity (>250 mA) - robust against transient ground bounce and supply rail disturbances |
| Package | TSSOP-48 (DGG), 12.6 mm × 6.1 mm × 1.2 mm - surface-mount compatible with automated assembly and IPC-7351 land patterns |
Pinout & Package
TSSOP-48 (DGG) package: 12.6 mm × 6.1 mm body, 0.5 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant. Pin 1 marked by beveled corner and located in Quadrant Q1 of tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable (4 independent controls) | Enables/disables corresponding 4-bit buffer section; tied to VCC via pullup for power-up high-Z safety |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Input terminals (16 total) | CMOS-compatible inputs with VIH/VIL thresholds scaling with VCC - no external level shifters needed |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Inverting buffered outputs (16 total) | True 3-state outputs with rail-to-rail swing; output impedance < 30 Ω when active |
| VCC (Pins 7, 21, 34, 48) | Power supply | Distributed VCC pins minimize IR drop and reduce simultaneous switching noise in high-frequency operation |
| GND (Pins 4, 10, 15, 27, 32, 39, 45) | Ground reference | Seven GND pins provide low-inductance return paths - essential for signal integrity at >50 MHz edge rates |
Key Features
| Feature | Design Value |
|---|---|
| Inverting 3-state buffer architecture | Four independent 4-bit sections allow selective bus gating - e.g., enable only address bits A0–A3 while holding A4–A15 high-Z |
| Flow-through pinout | Inputs on left side (pins 43–48, 40–41, 35–36, 29–30), outputs on right side (pins 2–6, 8–12, 13–17, 19–23) - eliminates layer crossings and reduces stub length |
| Distributed power/ground | Four VCC and seven GND pins interleaved across package - lowers PDN impedance and suppresses ΔI/Δt noise by >6 dB vs. single-rail packages |
| EPIC™ CMOS process | Ensures 2-V operation compatibility and sub-10 ns propagation at 3.3 V - suitable for battery-powered or low-power hold modes |
| Industrial temperature rating | –40°C to +85°C operation verified per JEDEC JESD22-A108 - validated for use in motor drives, industrial HMIs, and base station control cards |
Applications
| Memory Address Buffering | Bus Transceiver Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory in an industrial PLC backplane. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing level translation and fanout expansion between controller and memory array. Use Value: Flow-through pinout minimizes trace skew across all 16 bits; ±8 mA drive ensures setup/hold timing margins are maintained at 20 MHz bus clock. |
Use Scenario: Isolating two 16-bit data buses in a modular test instrument with hot-swappable daughterboards. IC Role / Device Role / Timing Role: Bidirectional bus driver controlled by separate OE signals per 4-bit segment for partial bus arbitration. Use Value: Independent OE inputs allow staggered enable/disable sequencing - prevents bus contention during module insertion/removal. |
| Clock Distribution Network | Legacy Peripheral Interface |
Use Scenario: Buffering and distributing a 16-bit parallel clock enable signal across multiple FPGA configuration banks. IC Role / Device Role / Timing Role: Low-skew inverting driver ensuring synchronized clock gating across heterogeneous logic domains. Use Value: Matched tPLH/tPHL (≤0.5 ns skew @ 5 V) guarantees simultaneous assertion of enable signals to all banks within 1 ns. |
Use Scenario: Interfacing a modern ARM-based SoC (3.3 V I/O) to legacy 5 V parallel peripherals like dot-matrix displays or stepper motor controllers. IC Role / Device Role / Timing Role: Voltage-tolerant buffer translating logic levels while maintaining timing integrity across mixed-supply domains. Use Value: 5.5 V absolute max input rating and 2–5.5 V operating range eliminate need for discrete level-shifting circuitry. |
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 |
|---|---|---|---|
| SN74AHCT16240DGGR | Higher VIH threshold (2 V min @ 4.5 V VCC); TTL-input compatible; slightly higher ICC (max 40 µA vs. 40 µA typical) | Better suited for interfacing with legacy 5 V TTL outputs; less ideal for pure CMOS systems below 3 V | Select when driving from 5 V TTL sources; avoid if system operates below 3 V or requires lowest static current |
| 74LVC16244APAG | Non-inverting; 3.3 V only (1.65–3.6 V); lower drive (±24 mA); smaller TSSOP-48 (6.1 mm × 6.1 mm) | Requires external inversion logic; incompatible with 5 V systems; better for space-constrained 3.3 V-only designs | Choose only for compact 3.3 V applications where inversion is handled elsewhere; not drop-in for SN74AHC16240DGGR |
Compared with SN74AHCT16240DGGR and 74LVC16244APAG, the SN74AHC16240DGGR uniquely balances wide VCC range (2–5.5 V), inverting logic, and industrial temperature support - making it the only option qualified for mixed-voltage, thermally demanding, and legacy-compatible bus buffering.
Availability
SN74AHC16240DGGR is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, and embedded computing applications requiring stable component supply and long-term manufacturability.
Supply support for SN74AHC16240DGGR 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 interface ICs.
The SN74AHC16240DGGR belongs to TI's Widebus™ family of high-speed, low-power bus interface devices - engineered specifically for memory addressing, clock distribution, and multi-drop bus isolation in industrial and communications infrastructure.
FAQ
What is the maximum clock frequency supported by SN74AHC16240DGGR in a 16-bit address bus application?
The SN74AHC16240DGGR does not specify a maximum clock frequency directly, but its propagation delay (tPLH/tPHL = 3.6 ns min @ 5 V, 15 pF) and enable/disable times (tPZH/tPLZ = 4.7 ns min @ 5 V) support reliable operation in systems with address strobe periods ≥10 ns - corresponding to effective bus rates up to 100 MHz. System-level timing must account for board trace delays and load capacitance.
Does SN74AHC16240DGGR require external pull-up resistors on OE pins, and what value is recommended?
Yes - to ensure high-impedance state during power-up or brownout, each OE pin (1OE–4OE) must be tied to VCC via a pull-up resistor. The minimum value depends on the driver's current-sinking capability; TI recommends ≥10 kΩ for typical 3.3 V or 5 V systems. Lower values (e.g., 4.7 kΩ) improve noise immunity but increase quiescent current.
Can SN74AHC16240DGGR be used in a 3.3 V system interfacing with 5 V peripherals?
Yes - the SN74AHC16240DGGR supports VCC = 3.3 V and tolerates input voltages up to 5.5 V (absolute max 7 V). When powered at 3.3 V, its outputs swing rail-to-rail (0 V / 3.3 V), so direct connection to 5 V peripherals requires external clamping or level-shifting unless the peripheral inputs are 3.3 V tolerant.
How does the flow-through architecture of SN74AHC16240DGGR improve PCB layout compared to traditional dual-row buffers?
The flow-through architecture of SN74AHC16240DGGR places all 16 inputs on the left side and all 16 outputs on the right side of the TSSOP-48 package. This allows straight, short, parallel traces with matched lengths - eliminating vias, reducing crosstalk, and cutting routing time by ~40% versus zig-zag layouts in conventional packages like SOIC-24 duals.
Is SN74AHC16240DGGR pin-compatible with other members of the '16240 family, such as SN74AHC16244 or SN74AHC16373?
No - SN74AHC16240DGGR is not pin-compatible with SN74AHC16244 (non-inverting) or SN74AHC16373 (latched transceiver). While all are 48-pin TSSOP devices, their pinouts differ significantly: SN74AHC16240DGGR has dedicated OE per 4-bit group and inverting outputs, whereas '16244 uses shared OE and non-inverting outputs, and '16373 adds latch clocks and direction control. Board redesign is required for substitution.
SN74AHC16240DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 48-TFSOP (0.240", 6.10mm 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-TSSOP
SN74AHC16240DGGR FAQ
1.How can I place an order for SN74AHC16240DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC16240DGGR 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 SN74AHC16240DGGR reliable?
The price and inventory of SN74AHC16240DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC16240DGGR is usually 5 days.
3.What payment methods are accepted for SN74AHC16240DGGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC16240DGGR transactions.
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4.How is shipping managed for SN74AHC16240DGGR?
SN74AHC16240DGGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC16240DGGR 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 SN74AHC16240DGGR?
For technical support, including SN74AHC16240DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC16240DGGR requirements.
6.How does Aetrix verify that SN74AHC16240DGGR is sourced from the original manufacturer or authorized distributors?
All SN74AHC16240DGGR 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 SN74AHC16240DGGR meets industry standards.
7.What is the process for return or replacement of SN74AHC16240DGGR?
All SN74AHC16240DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC16240DGGR, 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 SN74AHC16240DGGR part is unused and in its original packaging.
Return procedure for SN74AHC16240DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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