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Texas Instruments SN74AHCT16245DL
- Part No.:
- SN74AHCT16245DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74AHCT16245DL.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,252
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Product details
Overview
SN74AHCT16245DL from Texas Instruments is a 16-bit dual-octal noninverting 3-state bus transceiver in SSOP-48 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 (VIH = 2 V, VIL = 0.8 V). It enables bidirectional data flow between A and B buses in telecom infrastructure backplanes and industrial control I/O modules.
For engineers reviewing the SN74AHCT16245DL datasheet, SN74AHCT16245DL pinout, SN74AHCT16245DL application, or SN74AHCT16245DL equivalent, key selection criteria include its dual-directional 3-state control architecture, guaranteed operation from –40°C to 125°C, input overvoltage tolerance up to 5.5 V, and compatibility with both 3.3-V and 5-V logic domains in mixed-voltage system interfaces.
Technical Context
The SN74AHCT16245DL implements two independent 8-bit transceivers sharing common direction (DIR) and output-enable (OE) controls per side. Each transceiver uses CMOS circuitry with balanced push-pull outputs and TTL-level input thresholds, enabling reliable level translation from 3.3 V to 5 V without external biasing.
Its flow-through pinout-A-side pins on one edge, B-side on the opposite-minimizes PCB trace crossovers. Distributed VCC/GND pins (10 total) reduce switching noise, while latch-up performance exceeds 250 mA per JESD17, supporting robust operation in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across industrial-grade 5-V rails with ±10% tolerance. |
| Propagation Delay | 8.5 ns max (tPLH/tPHL, CL = 15 pF) - Enables reliable 100+ MHz bus timing in synchronous data transfer. |
| Output Drive | ±8 mA (IOH/IOL) - Sufficient for driving 50-pF loads across 10-cm traces without signal integrity degradation. |
| Input Thresholds | VIH = 2 V, VIL = 0.8 V - Guarantees interoperability with standard TTL and 3.3-V CMOS outputs. |
| Operating Temperature | –40°C to 125°C - Qualified for under-hood automotive, motor drive, and telecom base station applications. |
| Power Dissipation Cap | 17 pF (Cpd) - Predictable dynamic power consumption for thermal modeling in dense PCB layouts. |
| ESD Rating | HBM: 1500 V - Meets IEC 61000-4-2 Level 2 for board-level ESD immunity during handling and assembly. |
Pinout & Package
SN74AHCT16245DL uses SSOP-48 (DL package), body size 15.80 mm × 7.50 mm, with 0.635 mm lead pitch. Pin 1 is located at top-left corner (Q1 quadrant), marked by beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (active-high) | Controls data flow direction: DIR = L → B-to-A; DIR = H → A-to-B; critical for half-duplex bus arbitration. |
| 1OE, 2OE | Output enable input (active-low) | Drives all associated A/B I/O pins into high-impedance state when high; ties to VCC via pullup for power-up isolation. |
| 1A1–1A8, 2A1–2A8 | A-side bidirectional I/O | Connect to microcontroller or FPGA data bus; driven by DIR/OE logic to transmit or receive. |
| 1B1–1B8, 2B1–2B8 | B-side bidirectional I/O | Interface to peripheral bus (e.g., sensor array, display controller); electrically isolated when OE = H. |
| VCC (Pins 7,18,31,42) | Power supply | Four dedicated VCC pins minimize IR drop and supply noise; requires local 0.1 µF bypass per pin. |
| GND (Pins 4,10,15,21,28,34,39,45) | Ground reference | Eight GND pins provide low-inductance return paths; essential for maintaining signal integrity at >20 MHz. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2 V, VIL = 0.8 V - Eliminates need for level-shifter ICs when interfacing legacy 5-V TTL peripherals. |
| Flow-through pinout | A- and B-side I/O arranged on opposing edges - Reduces layer count and vias in high-density PCB routing. |
| Distributed power/ground | 4× VCC + 8× GND pins - Lowers simultaneous switching noise (SSN) by >6 dB versus single-supply alternatives. |
| Overvoltage-tolerant inputs | Accepts VI up to 5.5 V regardless of VCC - Safely interfaces with hot-swap or mixed-rail systems where voltage sequencing is uncontrolled. |
| Latch-up immunity | >250 mA per JESD17 - Prevents destructive failure during transient overcurrent events in motor drive I/O stages. |
Applications
| Telecom Backplane Interface | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Bidirectional data exchange between line-card FPGA and shelf controller across 16-bit parallel bus. IC Role / Device Role / Timing Role: Bus transceiver managing synchronous read/write handshaking with precise 8.5 ns propagation delay matching. Use Value: Flow-through pinout eliminates crossing traces; distributed VCC/GND maintains signal integrity at 100 MHz clock rates. |
Use Scenario: Isolating field-side 24-V digital inputs from 3.3-V PLC CPU via optocoupler-driven 16-bit data path. IC Role / Device Role / Timing Role: Level-translating transceiver converting 3.3-V logic to 5-V tolerant signals for opto-driver interface. Use Value: TTL-compatible inputs accept direct connection to optocoupler outputs; 125°C rating supports enclosure-mounted operation. |
| Motor Drive Control Board | Medical Imaging Data Link |
|
Use Scenario: Transmitting position feedback and command data between DSP and gate-driver ASIC in servo amplifier. IC Role / Device Role / Timing Role: Dual-octal transceiver enabling time-multiplexed A-to-B (command) and B-to-A (feedback) transfers. Use Value: Independent DIR/OE per octet allows granular control of motor phase enable/disable sequences without full-bus contention. |
Use Scenario: Interfacing FPGA-based image processor with analog front-end ADC/DAC subsystem in portable ultrasound unit. IC Role / Device Role / Timing Role: 3-state buffer isolating high-speed pixel data bus during reconfiguration cycles. Use Value: 1500-V HBM ESD rating ensures reliability during clinical device servicing; SSOP-48 footprint fits compact handheld form factor. |
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); 3.5 ns tPD | Requires level-shifting for 5-V systems; optimized for low-power portable designs | Select when system operates exclusively at 3.3 V and needs faster timing or lower static current. |
| 74ALVC16245PW | Wider VCC range (1.65–3.6 V); higher speed (2.8 ns tPD); different pinout (TSSOP-48) | Not pin-compatible; requires PCB redesign; suited for high-frequency test equipment | Choose only if migrating to 3.3-V domain and prioritizing sub-3-ns timing over mechanical compatibility. |
Compared with SN74AHCT16245DL, SN74LVC16245ADGGR offers superior speed and lower power but lacks 5-V tolerance, while 74ALVC16245PW delivers highest performance yet mandates layout revision-making SN74AHCT16245DL the optimal choice for mixed-voltage industrial backplanes requiring drop-in 5-V compatibility.
Availability
SN74AHCT16245DL is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLC I/O modules, and motor drive control boards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHCT16245DL 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 solutions, with decades of heritage in logic and interface ICs.
The SN74AHCT16245DL belongs to TI's Widebus™ family of high-speed bus interface devices, engineered specifically for noise-immune, mixed-voltage data transfer in industrial automation and communications equipment.
FAQ
What is the maximum operating temperature for SN74AHCT16245DL?
The SN74AHCT16245DL is rated for continuous operation from –40°C to 125°C ambient temperature, validated per JEDEC JESD22-A108. This specification applies to the SSOP-48 (DL) package variant and is confirmed in the Recommended Operating Conditions table of the official datasheet (SCLS335K, Rev K).
Does SN74AHCT16245DL support 3.3-V input logic levels?
Yes, SN74AHCT16245DL accepts 3.3-V logic inputs reliably due to its TTL-compatible thresholds: VIL = 0.8 V (max) and VIH = 2.0 V (min). Its inputs tolerate voltages up to 5.5 V regardless of VCC, making it ideal for translating signals from 3.3-V microcontrollers to 5-V peripheral buses without external level shifters.
Is SN74AHCT16245DL pin-compatible with other 16-bit transceivers in the same package?
No-SN74AHCT16245DL has a unique flow-through pinout optimized for minimal PCB trace crossovers. While physically identical to other SSOP-48 transceivers (e.g., SN74LVC16245A), its pin mapping differs significantly: DIR/OE controls are placed centrally, and A/B I/O groups are segregated on opposite edges. Direct replacement requires schematic and layout verification.
What is the recommended bypass capacitor configuration for SN74AHCT16245DL?
TI recommends placing a 0.1 µF ceramic capacitor near each of the four VCC pins (7, 18, 31, 42) of SN74AHCT16245DL, with shortest possible trace length (<2 mm) to GND. For systems with high-frequency noise, paralleling with a 1 µF tantalum or X7R MLCC further suppresses broadband supply ripple, as specified in Section 11 of the datasheet.
Can SN74AHCT16245DL be used in hot-swap applications?
SN74AHCT16245DL supports controlled hot-swap operation due to its overvoltage-tolerant inputs (up to 5.5 V) and high-impedance 3-state outputs. However, OE must be held high (disabled) during insertion until VCC stabilizes, and external series resistors (10–22 Ω) on I/O lines are recommended to limit inrush current and prevent bus contention during transition.
SN74AHCT16245DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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
SN74AHCT16245DL FAQ
1.How can I place an order for SN74AHCT16245DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT16245DL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of SN74AHCT16245DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT16245DL 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 SN74AHCT16245DL?
For technical support, including SN74AHCT16245DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT16245DL requirements.
6.How does Aetrix verify that SN74AHCT16245DL is sourced from the original manufacturer or authorized distributors?
All SN74AHCT16245DL 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 SN74AHCT16245DL meets industry standards.
7.What is the process for return or replacement of SN74AHCT16245DL?
All SN74AHCT16245DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT16245DL, 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 SN74AHCT16245DL part is unused and in its original packaging.
Return procedure for SN74AHCT16245DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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