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Texas Instruments SN74AHCT16245DGGR
- Part No.:
- SN74AHCT16245DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74AHCT16245DGGR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:965
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Product details
Overview
SN74AHCT16245DGGR from Texas Instruments is a 16-bit dual-octal noninverting 3-state bus transceiver in 48-pin TSSOP (DGG) package, operating at 4.5–5.5 V, with 8 ns typical propagation delay (CL = 15 pF), ±8 mA output drive, and TTL-compatible inputs. It enables bidirectional data flow between A and B buses in industrial control backplanes and embedded system interconnects.
For engineers reviewing the SN74AHCT16245DGGR datasheet, SN74AHCT16245DGGR pinout, SN74AHCT16245DGGR application, or SN74AHCT16245DGGR equivalent, key selection factors include its dual 8-bit directional control (1DIR/2DIR), independent 3-state enable (1OE/2OE), flow-through pinout for PCB routing optimization, and –40°C to 125°C industrial temperature range.
Technical Context
The SN74AHCT16245DGGR implements two independent 8-bit transceiver channels, each with dedicated direction (DIR) and output-enable (OE) controls. Its CMOS design uses TTL-level input thresholds (VIH = 2 V, VIL = 0.8 V) to support 3.3 V-to-5 V level translation while maintaining 5 V supply compatibility.
Each channel supports synchronous bidirectional communication: when DIR = L, data flows B→A; when DIR = H, data flows A→B; OE = H forces high-impedance isolation. The device features distributed VCC/GND pins and flow-through architecture to minimize switching noise and simplify PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures robust operation across industrial 5 V rail tolerances. |
| Propagation Delay | 8.5 ns max (CL = 15 pF) - Enables reliable timing in 100+ MHz bus systems. |
| Output Drive | ±8 mA - Sufficient for driving 50 pF loads without external buffers. |
| Input Compatibility | TTL voltage levels (VIH = 2 V, VIL = 0.8 V) - Direct interface with legacy 5 V logic and 3.3 V microcontrollers. |
| Operating Temperature | –40°C to 125°C - Qualified for under-hood automotive and industrial motor drive environments. |
| 3-State Leakage | ±2.5 µA max - Minimizes bus contention current during isolation mode. |
| Power Dissipation Cap | 17 pF - Predictable dynamic power consumption at 1 MHz switching frequency. |
Pinout & Package
SN74AHCT16245DGGR is housed in a 48-pin Thin Shrink Small Outline Package (TSSOP-DGG), 12.50 mm × 6.10 mm body size, 1.2 mm max height, with gull-wing leads and moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Selects data flow direction per 8-bit channel: DIR = H → A→B; DIR = L → B→A. |
| 1OE, 2OE | Output enable input | Active-low control: OE = L enables transceiver; OE = H places A/B I/Os in high-Z state. |
| 1A1–1A8, 2A1–2A8 | Port A I/O | First and second 8-bit data bus interface on A side; bidirectional per DIR setting. |
| 1B1–1B8, 2B1–2B8 | Port B I/O | First and second 8-bit data bus interface on B side; bidirectional per DIR setting. |
| VCC (Pins 7,18,31,42) | Power supply | Distributed 5 V supply connections reduce simultaneous switching noise and improve PSRR. |
| GND (Pins 4,10,15,21,28,34,39,45) | Ground reference | Eight ground pins provide low-inductance return paths for all 16 I/Os and internal logic. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Input and output pins arranged opposite each other (e.g., 1A1 ↔ 1B1) to eliminate layer jumps and reduce trace length in PCB layout. |
| Distributed VCC/GND | Four VCC and eight GND pins interleaved across the package to suppress ground bounce and improve signal integrity. |
| TTL-compatible inputs | VIH = 2 V / VIL = 0.8 V thresholds allow direct connection to 3.3 V MCU GPIOs without level shifters in 5 V systems. |
| Slow-edge outputs | Controlled slew rate minimizes overshoot/undershoot on unterminated transmission lines, reducing EMI in noisy industrial environments. |
| Latch-up immunity | Exceeds 250 mA per JESD17 - prevents destructive latch-up during hot-swap or bus contention events. |
Applications
| Industrial Backplane Interconnect | Motor Drive Control Interface |
|---|---|
Use Scenario: Bidirectional data exchange between main controller and modular I/O expansion cards in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: 16-bit transceiver isolating and translating control/status signals between 5 V CPU bus and isolated field-side peripherals. Use Value: Independent DIR/OE per 8-bit channel allows concurrent A→B and B→A transfers, increasing backplane throughput without arbitration overhead. | Use Scenario: Communication between microcontroller and gate driver ICs in servo amplifier modules. IC Role / Device Role / Timing Role: Level-translating buffer for PWM command and fault feedback signals between 3.3 V MCU and 5 V isolated gate drivers. Use Value: TTL-compatible inputs accept 3.3 V logic directly; slow-edge outputs prevent ringing on long traces to gate drivers, improving MOSFET switching reliability. |
| Medical Imaging Data Bus | Automotive Body Control Module |
Use Scenario: High-reliability data transfer between FPGA-based image processor and sensor acquisition boards in ultrasound systems. IC Role / Device Role / Timing Role: 3-state transceiver enabling time-multiplexed access to shared memory-mapped registers across multiple subsystems. Use Value: –40°C to 125°C rating ensures stable operation in thermally constrained enclosures; distributed power/ground pins suppress noise coupling into analog front-end circuits. | Use Scenario: Interfacing 5 V CAN transceivers and LIN controllers with 3.3 V application processors in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional protocol-agnostic bus bridge handling configuration, diagnostics, and sensor data between mixed-voltage domains. Use Value: Dual-channel independence allows simultaneous CAN status readback and LIN command transmission, reducing communication latency in safety-critical functions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | 3.3 V only supply (1.65–3.6 V); lower drive (±24 mA); no TTL input compatibility. | Requires level-shifting for 5 V systems; optimized for low-voltage portable electronics. | Choose for battery-powered designs where 5 V operation is unnecessary and lower power is critical. |
| 74ALVC16245PW,118 | 3.3 V supply (1.65–3.6 V); higher speed (tPD = 3.2 ns typ); same pinout but different marking and thermal specs. | Better suited for high-speed memory interfaces; lacks industrial temp range (–40°C to 125°C). | Select when maximum bandwidth is required and ambient temperature stays within commercial range (0°C to 70°C). |
Compared with SN74LVC16245ADGGR and 74ALVC16245PW,118, the SN74AHCT16245DGGR uniquely supports 5 V operation with TTL input compatibility and extended temperature range-making it the only choice for legacy 5 V industrial systems requiring drop-in replacement of older 74ACT/74F devices.
Availability
SN74AHCT16245DGGR is available at Aetrix Electronics and suitable for industrial automation backplanes, motor drive control interfaces, and medical imaging data buses requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHCT16245DGGR 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 connectivity technologies, with over 90 years of innovation in industrial, automotive, and communications markets.
The SN74AHCT16245DGGR belongs to TI's Widebus™ family of high-speed logic devices, engineered specifically for robust, noise-immune bidirectional bus interfacing in harsh industrial and automotive environments.
FAQ
What is the maximum operating temperature for SN74AHCT16245DGGR?
The SN74AHCT16245DGGR is rated for continuous operation from –40°C to 125°C, meeting industrial and extended-temperature automotive requirements. This specification is validated per JEDEC JESD22-A108 and confirmed in the Recommended Operating Conditions table of the official datasheet (SCLS335K, Rev K). Thermal derating is not required within this full range, and the device maintains specified timing and drive performance across the entire span.
Does SN74AHCT16245DGGR support 3.3 V logic inputs?
Yes, SN74AHCT16245DGGR accepts 3.3 V logic inputs reliably due to its TTL-compatible input thresholds: VIH = 2.0 V (min) and VIL = 0.8 V (max) at VCC = 4.5–5.5 V. This allows direct connection to 3.3 V microcontrollers without level shifters, enabling seamless 3.3 V-to-5 V up-translation in mixed-voltage systems as documented in Section 10.2.1 of the datasheet.
How many independent transceiver channels does SN74AHCT16245DGGR have?
The SN74AHCT16245DGGR contains two independent 8-bit transceiver channels (labeled Channel 1 and Channel 2), each with dedicated direction (1DIR/2DIR) and output-enable (1OE/2OE) controls. This dual-channel architecture permits concurrent bidirectional data transfers-for example, A→B on Channel 1 while B→A on Channel 2-without cross-talk or timing dependency.
What is the purpose of the multiple VCC and GND pins on SN74AHCT16245DGGR?
SN74AHCT16245DGGR features four VCC pins (7, 18, 31, 42) and eight GND pins (4, 10, 15, 21, 28, 34, 39, 45) to minimize simultaneous switching noise and improve power integrity. This distributed power/ground scheme reduces ground bounce, enhances PSRR, and supports clean signal transitions across all 16 I/Os-critical for stable operation in high-noise industrial environments as highlighted in the "Distributed VCC and GND Pins" feature.
Can SN74AHCT16245DGGR be used in hot-swap applications?
SN74AHCT16245DGGR incorporates latch-up immunity exceeding 250 mA per JESD17, making it suitable for controlled hot-swap scenarios where bus contention may occur during insertion. However, OE should be held high (disabled) during insertion, and external current limiting or sequencing is recommended. The device's overvoltage-tolerant inputs (up to 5.5 V) further enhance robustness during transitional states.
SN74AHCT16245DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
SN74AHCT16245DGGR FAQ
1.How can I place an order for SN74AHCT16245DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT16245DGGR 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 SN74AHCT16245DGGR reliable?
The price and inventory of SN74AHCT16245DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT16245DGGR is usually 5 days.
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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 SN74AHCT16245DGGR?
For technical support, including SN74AHCT16245DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT16245DGGR requirements.
6.How does Aetrix verify that SN74AHCT16245DGGR is sourced from the original manufacturer or authorized distributors?
All SN74AHCT16245DGGR 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 SN74AHCT16245DGGR meets industry standards.
7.What is the process for return or replacement of SN74AHCT16245DGGR?
All SN74AHCT16245DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT16245DGGR, 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 SN74AHCT16245DGGR part is unused and in its original packaging.
Return procedure for SN74AHCT16245DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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