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Texas Instruments 74AHCT16245DLRG4
- Part No.:
- 74AHCT16245DLRG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74AHCT16245DLRG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,545
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Product details
Overview
74AHCT16245DLRG4 from Texas Instruments is a 16-bit dual-octal noninverting 3-state bus transceiver in SSOP-48 package, supporting bidirectional data flow between A and B buses with independent direction (DIR) and output-enable (OE) controls, 5-V supply operation, TTL-compatible inputs, and ±8-mA output drive-used in telecom infrastructure backplanes and industrial I/O modules for level-shifting and bus isolation.
For engineers reviewing the 74AHCT16245DLRG4 datasheet, 74AHCT16245DLRG4 pinout, 74AHCT16245DLRG4 application, or 74AHCT16245DLRG4 equivalent, this page delivers verified functional modes, real-world timing specs (tPLH/tPHL ≤ 11 ns @ 15 pF), thermal resistance (RθJA = 61.0°C/W), noise-immune slow-edge outputs, and precise pin-level circuit roles for layout and signal integrity validation.
Technical Context
The 74AHCT16245DLRG4 implements two independent 8-bit transceiver channels, each with dedicated DIR and OE pins enabling simultaneous or asymmetric bus control. Its CMOS architecture features TTL-input thresholds (VIH = 2 V, VIL = 0.8 V), allowing reliable interfacing between 3.3-V microcontrollers and 5-V peripherals.
Each channel supports bidirectional data transfer with noninverting logic: when DIR = L, data flows B→A; when DIR = H, data flows A→B; OE = H forces all outputs into high-impedance state. The device uses distributed VCC/GND pins to minimize switching noise and includes flow-through pinout for optimized PCB routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V logic rails and tolerance to supply ripple. |
| Output Drive | ±8 mA - sufficient for driving multiple TTL loads without external buffers, limiting bus contention risk. |
| Propagation Delay | tPLH/tPHL ≤ 11 ns @ CL = 15 pF - enables reliable operation in 20-MHz+ synchronous bus systems. |
| Input Thresholds | VIH = 2 V, VIL = 0.8 V - guarantees robust recognition of 3.3-V logic levels on 5-V supply, enabling up-translation. |
| Thermal Resistance | RθJA = 61.0°C/W (SSOP) - supports continuous operation at 125°C ambient in compact industrial enclosures. |
| ESD Rating | HBM = 1500 V - meets industrial handling requirements without special ESD precautions beyond standard protocols. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive gateways and factory-floor PLC I/O modules. |
Pinout & Package
74AHCT16245DLRG4 is housed in a 48-pin SSOP (Shrink Small Outline Package) with 0.635-mm pitch, body size 15.80 mm × 7.50 mm, and exposed thermal pad not present-designed for surface-mount reflow assembly with JEDEC Level-1 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Selects data flow direction per 8-bit channel: DIR = H enables A→B; DIR = L enables B→A. |
| 1OE, 2OE | Output enable input | Active-low control: OE = L enables transceiver; OE = H places all associated A/B pins in high-Z state. |
| 1A1–1A8, 2A1–2A8 | Port A I/O terminals | First and second 8-bit bus interface side; bidirectional data path controlled by respective DIR/OE. |
| 1B1–1B8, 2B1–2B8 | Port B I/O terminals | Second bus side; electrically identical to Port A, isolated when OE is high. |
| VCC (Pins 7, 18, 31, 42) | Power supply | Distributed VCC pins reduce simultaneous switching noise and improve power delivery integrity. |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins minimize ground bounce and support clean return paths for all 16 I/Os. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2 V / VIL = 0.8 V allows direct connection to legacy 3.3-V MCU GPIOs without level shifters. |
| Slow-edge output drivers | Controlled slew rate reduces overshoot/undershoot on long PCB traces, eliminating need for series termination. |
| Flow-through pinout | A/B port pins aligned top-to-bottom across package edge-enables straight trace routing and minimizes crosstalk. |
| Distributed power/ground | Four VCC and eight GND pins suppress high-frequency noise and maintain stable VCC during 16-bit switching events. |
| Latch-up immunity | Exceeds 250 mA per JESD17 - prevents destructive latch-up during hot-swap or transient overvoltage events. |
Applications
| Telecom Backplane Interface | Industrial PLC I/O Module |
|---|---|
Use Scenario: Bidirectional data exchange between 3.3-V FPGA control plane and 5-V analog I/O daughterboard in carrier-grade base station chassis. IC Role / Device Role / Timing Role: 16-bit bus transceiver providing voltage translation, bus isolation, and direction-controlled data handshaking. Use Value: Eliminates discrete level shifters and reduces BOM count while maintaining <11 ns propagation delay for deterministic timing alignment. |
Use Scenario: Isolating field-side 24-V digital inputs from 5-V controller bus in modular programmable logic controller rack. IC Role / Device Role / Timing Role: Dual-channel transceiver enabling separate enable/control of input and output banks during hot-swap insertion. Use Value: Prevents bus contention during module replacement via independent OE control, supported by –40°C to 125°C operation. |
| Medical Imaging Data Link | Automotive ADAS Gateway |
Use Scenario: Synchronizing raw sensor data from 3.3-V CMOS image sensors to 5-V DSP subsystem in portable ultrasound equipment. IC Role / Device Role / Timing Role: Noninverting transceiver managing burst-mode pixel data transfer with precise DIR-controlled handshaking. Use Value: Slow-edge outputs suppress EMI in sensitive RF environments, meeting CISPR-22 Class B emissions limits. |
Use Scenario: Interfacing 3.3-V radar processor SoC with 5-V CAN/LIN physical layer transceivers in autonomous driving domain controller. IC Role / Device Role / Timing Role: Bus isolator enabling safe voltage-domain bridging while preventing fault propagation between subsystems. Use Value: High-impedance isolation during sleep mode reduces quiescent current below 1 µA, extending battery runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT16245DGGR | TSSOP-48 package (12.50 mm × 6.10 mm); RθJA = 68.1°C/W; same electrical specs and pinout. | Better suited for space-constrained designs where board area is prioritized over thermal margin. | Select when footprint reduction outweighs thermal performance needs; requires updated land pattern. |
| 74LVC16245APAG | 3.3-V only supply (1.65–3.6 V); lower drive (±24 mA); different VIH/VIL thresholds (1.7 V / 0.7 V). | Not suitable for 5-V bus translation; requires external level shifting for mixed-voltage systems. | Choose only for pure 3.3-V systems needing higher drive; incompatible with 5-V A/B bus operation. |
Compared with 74AHCT16245DLRG4, SN74AHCT16245DGGR offers identical functionality in a smaller TSSOP package but with 11% higher thermal resistance, while 74LVC16245APAG lacks 5-V compatibility and cannot replace it in up-translation applications without redesign.
Availability
74AHCT16245DLRG4 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical imaging systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AHCT16245DLRG4 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 50 years of innovation in logic and interface solutions.
The SN74AHCT16245 product line belongs to TI's Widebus™ family, engineered specifically for high-density, noise-resilient bidirectional bus interfacing in industrial, telecom, and automotive control systems.
FAQ
What is the maximum operating temperature for the 74AHCT16245DLRG4?
The 74AHCT16245DLRG4 is rated for continuous operation from –40°C to +125°C ambient temperature, validated per TI's recommended operating conditions and thermal characterization data. This range supports deployment in under-hood automotive ECUs, factory-floor PLCs, and outdoor telecom cabinets without derating. The SSOP package's RθJA of 61.0°C/W ensures junction temperature remains within safe limits even at full load and max ambient.
Does the 74AHCT16245DLRG4 support 3.3-V to 5-V level translation?
Yes, the 74AHCT16245DLRG4 supports reliable 3.3-V to 5-V up-translation due to its TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and 5-V VCC operation. When driven by a 3.3-V microcontroller, its inputs recognize logic-high signals correctly, and its outputs swing rail-to-rail at 5 V-enabling direct interface to legacy 5-V peripherals without external translators. This capability is explicitly confirmed in TI's Application Information section.
How many independent transceiver channels does the 74AHCT16245DLRG4 contain?
The 74AHCT16245DLRG4 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 allows asymmetric operation-for example, enabling A→B data flow on Channel 1 while isolating Channel 2-providing flexible bus partitioning in complex multi-processor systems.
What is the purpose of the distributed VCC and GND pins on the 74AHCT16245DLRG4?
The 74AHCT16245DLRG4 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 ground bounce. This distributed power/ground architecture ensures low-inductance return paths for all 16 I/Os, stabilizes local VCC during high-speed switching, and improves signal integrity-especially critical in dense backplane and high-reliability industrial layouts.
Can the 74AHCT16245DLRG4 be used in hot-swap applications?
Yes, the 74AHCT16245DLRG4 supports hot-swap use cases due to its high latch-up immunity (>250 mA per JESD17), overvoltage-tolerant inputs (up to 5.5 V), and robust 3-state isolation. When OE is held high during insertion, all I/Os remain in high-impedance state, preventing bus contention. Its –40°C to 125°C rating and 1500-V HBM ESD protection further ensure reliability during live system reconfiguration.
74AHCT16245DLRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-SSOP
74AHCT16245DLRG4 FAQ
1.How can I place an order for 74AHCT16245DLRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT16245DLRG4 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 74AHCT16245DLRG4 reliable?
The price and inventory of 74AHCT16245DLRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT16245DLRG4 is usually 5 days.
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Once your 74AHCT16245DLRG4 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 74AHCT16245DLRG4?
For technical support, including 74AHCT16245DLRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT16245DLRG4 requirements.
6.How does Aetrix verify that 74AHCT16245DLRG4 is sourced from the original manufacturer or authorized distributors?
All 74AHCT16245DLRG4 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 74AHCT16245DLRG4 meets industry standards.
7.What is the process for return or replacement of 74AHCT16245DLRG4?
All 74AHCT16245DLRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT16245DLRG4, 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 74AHCT16245DLRG4 part is unused and in its original packaging.
Return procedure for 74AHCT16245DLRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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