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Texas Instruments SN74AHCT16240DGVR
- Part No.:
- SN74AHCT16240DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHCT16240DGVR.pdf
- Description:
- IC BUFFER INVERT 5.5V 48TVSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74AHCT16240DGVR from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for high-density bus interfacing in memory address, clock distribution, and data bus applications. It operates from 4.5 V to 5.5 V, supports TTL-level inputs, delivers ±8 mA output drive, and features symmetrical active-low OE controls per 4-bit section. Its TVSOP-48 package enables compact PCB layout in industrial control and embedded systems.
For engineers reviewing the SN74AHCT16240DGVR datasheet, SN74AHCT16240DGVR pinout, SN74AHCT16240DGVR application, or SN74AHCT16240DGVR equivalent, key selection criteria include 3-state timing (tPZH/tPLZ ≤ 12 ns at 50 pF), thermal performance (θJA = 58°C/W), input compatibility with TTL logic, flow-through pin architecture, and guaranteed operation from –40°C to 85°C.
Technical Context
The SN74AHCT16240DGVR implements four independent 4-bit inverting buffers, each with dedicated active-low output-enable (OE) inputs. Its EPIC™ CMOS process ensures TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) while maintaining 5-V CMOS output swing and rail-to-rail drive capability.
It uses distributed VCC/GND pins and flow-through pinout to minimize switching noise and simplify PCB routing. Latch-up immunity exceeds 250 mA per JESD17, and ESD protection exceeds 2000 V per MIL-STD-883 Method 3015 - critical for robust industrial bus interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V logic rails and tolerant of supply ripple. |
| Input Voltage Compatibility | TTL-level (VIH ≥ 2 V, VIL ≤ 0.8 V) - interoperable with legacy 74LS/TTL sources without level shifters. |
| Output Drive Strength | ±8 mA at VOH/VOL - sufficient to drive 50-pF loads with <12 ns enable/disable times and <10.5 ns propagation delay. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and automation equipment. |
| Thermal Resistance | θJA = 58°C/W (TVSOP) - enables higher sustained switching activity vs. TSSOP/SSOP variants under natural convection. |
| 3-State Leakage | IOZ ≤ ±2.5 µA at VCC = 5.5 V - ensures minimal bus contention current during high-impedance state. |
| Power Dissipation Capacitance | Cpd = 10 pF - predicts dynamic power consumption in high-frequency bus toggling scenarios. |
Pinout & Package
SN74AHCT16240DGVR is housed in a 48-pin Thin Very Small-Outline Package (TVSOP, DGV), measuring 12.6 mm × 6.1 mm × 1.2 mm (max height), JEDEC MO-153 compliant, with 0.4-mm pitch leads and Q1 pin-1 orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output-enable control | Each enables/disables one 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) | Inverting inputs - logic HIGH yields LOW output; all inputs must be terminated to VCC/GND for stable operation. |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Inverting 3-state outputs (16 total) | Drive external buses; enter high-impedance when corresponding OE is HIGH. |
| VCC (pins 7, 21, 34, 48) | Power supply | Distributed VCC pins reduce simultaneous switching noise and improve decoupling effectiveness. |
| GND (pins 4, 10, 15, 27, 32, 37, 43) | Ground reference | Seven GND pins provide low-inductance return paths and enhance signal integrity on high-speed buses. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting 3-state buffers | Four independent 4-bit sections allow flexible partitioning (e.g., 1×16-bit, 2×8-bit, or 4×4-bit bus isolation). |
| Flow-through pin architecture | Input and output pins aligned on opposite sides - eliminates layer jumps and reduces trace length in dense PCB layouts. |
| Distributed power/ground pins | Four VCC and seven GND pins minimize ground bounce and supply droop during 16-bit parallel switching. |
| TTL-compatible inputs | Accepts standard 74LS/ALS logic levels directly - eliminates need for external level-shifting circuitry. |
| Latch-up and ESD robustness | Exceeds 250 mA latch-up immunity (JESD17) and 2000 V HBM ESD (MIL-STD-883) - suitable for noisy industrial environments. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices sharing a common data bus. IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating address space; enables time-multiplexed access by enabling only one device's OE at a time. Use Value: Prevents bus contention during multi-chip select cycles; ±8 mA drive ensures fast edge rates into 50-pF load per line. | Use Scenario: Distributing a system clock to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs) with matched skew. IC Role / Device Role / Timing Role: Low-skew, inverting fanout buffer; OE controls enable/disable of clock domains during sleep or reconfiguration. Use Value: tsk(o) ≤ 1 ns ensures tight inter-output skew; flow-through layout minimizes trace-length mismatch across 16 outputs. |
| Industrial I/O Expansion | Legacy Bus Interface Bridge |
Use Scenario: Interfacing a modern 3.3-V MCU GPIO bank to legacy 5-V industrial sensors or actuators via optocoupler-isolated lines. IC Role / Device Role / Timing Role: Level-tolerant 5-V buffer translating MCU logic to 5-V bus; 3-state allows bidirectional shared-line arbitration. Use Value: TTL-compatible inputs accept 3.3-V logic highs reliably; 58°C/W θJA supports continuous operation in enclosed enclosures. | Use Scenario: Connecting ISA or PCI-104 peripheral cards to newer host controllers where native 5-V signaling is required. IC Role / Device Role / Timing Role: Bidirectional bus transceiver replacement - used as unidirectional driver/receiver pair with OE-controlled directionality. Use Value: Guaranteed 4.5–5.5 V operation meets legacy spec requirements; 250 mA latch-up rating withstands transient bus faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT16244DGVR | Non-inverting output logic; identical pinout, timing, and electrical specs otherwise. | Required where bus polarity must be preserved (e.g., direct replacement for non-inverting drivers). | Select when system logic requires true (not inverted) signal replication without external inversion. |
| SN74LVC16244ADGVR | Lower VCC range (1.65–3.6 V); 3.3-V optimized; higher speed (tPD ≈ 4.2 ns), but not 5-V tolerant. | Suitable only in pure 3.3-V systems; cannot interface directly to 5-V buses or TTL inputs. | Choose for cost-sensitive, low-power 3.3-V designs where 5-V compatibility is unnecessary. |
Compared with SN74AHCT16244DGVR and SN74LVC16244ADGVR, the SN74AHCT16240DGVR uniquely provides inverting logic with full 5-V TTL compatibility and industrial temperature support - making it the sole option for legacy 5-V bus buffering requiring polarity inversion and robust noise immunity.
Availability
SN74AHCT16240DGVR is available at Aetrix Electronics and suitable for industrial automation, embedded instrumentation, and legacy bus interface applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for SN74AHCT16240DGVR 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 expertise in high-reliability interface ICs.
The SN74AHCT16240DGVR belongs to TI's Widebus™ family of high-density bus interface devices, engineered specifically for noise-immune, space-efficient 16-bit buffering in industrial and computing infrastructure.
FAQ
What is the recommended power-up sequence for SN74AHCT16240DGVR to ensure safe 3-state behavior?
TI recommends tying all OE inputs to VCC through a pullup resistor (minimum value determined by driver sink capability) during power-up and power-down. This guarantees the outputs remain in high-impedance until valid logic levels stabilize. The SN74AHCT16240DGVR does not incorporate internal power-on reset circuitry, so external OE biasing is mandatory for glitch-free initialization.
Can SN74AHCT16240DGVR safely interface with 3.3-V microcontrollers?
Yes - the SN74AHCT16240DGVR accepts TTL-compatible inputs (VIH ≥ 2.0 V), making it fully compatible with 3.3-V CMOS logic outputs. Its 5-V supply ensures robust noise margins and full-swing 5-V outputs, but note that outputs are not 3.3-V tolerant; external clamping or level translation is required if driving 3.3-V inputs.
How does the flow-through pinout of SN74AHCT16240DGVR improve PCB layout compared to traditional packages?
The flow-through architecture places inputs on one side and corresponding outputs on the opposite side (e.g., A1→Y1 aligned vertically), eliminating cross-layer routing and minimizing trace length and crosstalk. For the SN74AHCT16240DGVR in TVSOP-48, this enables single-layer fanout in dense 16-bit bus designs - reducing layer count, cost, and signal integrity risk.
What is the maximum capacitive load the SN74AHCT16240DGVR can drive while maintaining specified timing?
The SN74AHCT16240DGVR is characterized up to 50 pF load capacitance, with tPLH/tPHL ≤ 10.5 ns and tPZH/tPLZ ≤ 13 ns at VCC = 5 V. Driving >50 pF increases propagation and enable/disable delays nonlinearly and may violate setup/hold timing in synchronous systems - use series termination or buffer staging for heavier loads.
Is SN74AHCT16240DGVR pin-compatible with other members of the AHCT16240 family?
Yes - SN74AHCT16240DGVR shares identical pinout and functionality with SN74AHCT16240DGGR (TSSOP) and SN74AHCT16240DLR (SSOP). All three use the same 48-pin footprint with matching signal, power, and ground assignments, enabling drop-in substitution based on board space and thermal requirements.
SN74AHCT16240DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TVSOP
SN74AHCT16240DGVR FAQ
1.How can I place an order for SN74AHCT16240DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT16240DGVR 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 SN74AHCT16240DGVR reliable?
The price and inventory of SN74AHCT16240DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT16240DGVR is usually 5 days.
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Once your SN74AHCT16240DGVR 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 SN74AHCT16240DGVR?
For technical support, including SN74AHCT16240DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT16240DGVR requirements.
6.How does Aetrix verify that SN74AHCT16240DGVR is sourced from the original manufacturer or authorized distributors?
All SN74AHCT16240DGVR 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 SN74AHCT16240DGVR meets industry standards.
7.What is the process for return or replacement of SN74AHCT16240DGVR?
All SN74AHCT16240DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT16240DGVR, 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 SN74AHCT16240DGVR part is unused and in its original packaging.
Return procedure for SN74AHCT16240DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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