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Texas Instruments SN74ALVCH16245KR
- Part No.:
- SN74ALVCH16245KR
- Manufacturer:
- Texas Instruments
- Package:
- 56-VFBGA
- Datasheet:
-
SN74ALVCH16245KR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,278
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Product details
Overview
SN74ALVCH16245 from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver designed for asynchronous bidirectional data transfer between two 8-bit buses operating at 1.65 V to 3.6 V. It features ±24-mA output drive at 3.3 V, 3 ns max propagation delay, bus-hold circuitry on all I/O pins, and 5.5-V tolerant inputs-enabling level translation (e.g., 5 V → 3.3 V) in server backplanes and telecom interface modules.
For engineers reviewing the SN74ALVCH16245 datasheet, SN74ALVCH16245 pinout, SN74ALVCH16245 application, or SN74ALVCH16245 equivalent, key selection criteria include direction-control logic behavior (DIR high = A→B, DIR low = B→A), independent OE control per octal bank, high-impedance state management during power sequencing, and compatibility with TSSOP-48, TVSOP-48, and SSOP-48 PCB footprints.
Technical Context
The SN74ALVCH16245 implements dual independent 8-bit transceivers, each with separate DIR and OE controls (1DIR/1OE for Bank 1, 2DIR/2OE for Bank 2), enabling asymmetric bus enablement and direction switching. Its CMOS design supports rail-to-rail input voltage tolerance up to 5.5 V regardless of VCC, allowing safe interfacing with higher-voltage logic domains without external level shifters.
Active bus-hold circuitry eliminates need for external pullup/pulldown resistors on unused I/Os, reducing BOM count and board space. Input leakage remains ≤±5 µA at 3.6 V, while output leakage in high-Z mode is ≤±10 µA-critical for low-power standby operation in network switches and LED display controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Supports mixed-voltage system integration across 1.8 V, 2.5 V, and 3.3 V domains |
| Max tpd | 3 ns at 3.3 V - Enables reliable timing closure in high-speed parallel bus interfaces up to ~300 MHz |
| Output Drive | ±24 mA at 3 V - Drives long PCB traces or multiple loads without signal degradation in motor driver I/O expanders |
| Input Tolerance | 5.5 V absolute max - Permits direct connection to 5 V logic without external clamping or translation |
| Bus-Hold Current | ±45 µA at 2.3 V - Maintains stable logic states on floating inputs, preventing metastability in unpopulated slots |
| ESD Rating | 2000 V HBM - Meets industrial-grade robustness requirements for cable modem termination systems |
| Operating Temp | –40 °C to +85 °C - Qualified for deployment in telecom infrastructure and server chassis environments |
Pinout & Package
TSSOP-48 (DGG), TVSOP-48 (DGV), and SSOP-48 (DL) packages are confirmed for SN74ALVCH16245. All variants share identical 48-pin functional mapping and pinout; mechanical dimensions differ per package type (e.g., DGG: 6.10 mm × 12.50 mm, DGV: 4.40 mm × 9.70 mm).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | High = data flow A→B; Low = B→A - Enables independent bidirectional control per 8-bit bank |
| 1OE, 2OE | Output enable input | Low = outputs active; High = high-impedance - Allows dynamic isolation of either bus segment |
| 1A1–1A8, 2A1–2A8 | A-port I/O | Transceiver inputs/outputs for first and second octal banks - Bus-hold active when undriven |
| 1B1–1B8, 2B1–2B8 | B-port I/O | Transceiver inputs/outputs for first and second octal banks - 5.5-V tolerant, no external clamping needed |
| VCC (Pins 7,18,31,42) | Power supply | Four dedicated VCC pins reduce IR drop and improve noise immunity in high-drive switching |
| GND (Pins 4,10,15,21,28,34,39,45) | Ground | Eight GND pins provide low-inductance return paths for simultaneous 16-bit switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 8-bit banks | Separate DIR/OE controls allow asymmetric bus arbitration-e.g., A→B enabled while B→A disabled |
| 5.5-V tolerant inputs | Eliminates external level translators when interfacing legacy 5 V peripherals to modern 3.3 V/1.8 V SoCs |
| Integrated bus-hold | Prevents floating inputs from drifting to indeterminate states-no external resistors required for I/O expanders |
| ±24-mA drive strength | Supports driving 50-pF loads over 10-cm traces at 3.3 V, critical for LED display column drivers |
| Low ICCZ in high-Z | ≤±10 µA leakage ensures minimal current draw during bus isolation in battery-backed telecom modules |
Applications
| Server Backplane Interface | Telecom Line Card I/O |
|---|---|
Use Scenario: Bidirectional data exchange between baseboard management controller (BMC) and hot-swap line cards in modular chassis. IC Role / Device Role / Timing Role: Level-translating bus transceiver isolating 3.3 V BMC logic from 5 V line card peripherals while maintaining signal integrity. Use Value: 5.5-V input tolerance enables direct connection to legacy 5 V UARTs and GPIO expanders without discrete translators. |
Use Scenario: Interfacing FPGA-based packet processors to analog front-end ASICs with mismatched I/O voltages. IC Role / Device Role / Timing Role: Synchronous bus buffer providing controlled direction switching and high-impedance isolation during reconfiguration. Use Value: Dual OE/DIR control allows independent enable/disable of transmit/receive paths-reducing cross-talk in dense line card layouts. |
| LED Display Column Driver | Motor Control I/O Expander |
Use Scenario: Driving 16-bit column data lines in outdoor full-color LED video walls requiring high-current sink capability. IC Role / Device Role / Timing Role: High-drive transceiver translating microcontroller parallel output to LED driver IC inputs under varying ambient temperatures. Use Value: ±24-mA output drive sustains brightness uniformity across 100+ cascaded LED modules without signal repeaters. |
Use Scenario: Extending GPIO count of MCU to manage enable signals, fault flags, and PWM inputs for multi-axis stepper drivers. IC Role / Device Role / Timing Role: Robust I/O expander with bus-hold protection against EMI-induced glitches in industrial motor enclosures. Use Value: Bus-hold circuitry prevents unintended motor activation during transient noise events on unterminated control lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245A | Lower drive (±24 mA only at 3.3 V; drops to ±12 mA at 2.5 V), no 5.5-V tolerance (max VI = VCC + 0.3 V) | Suitable for pure 3.3 V systems but requires external clamping for 5 V interfaces | Select when cost sensitivity outweighs level-translation requirement and VCC is fixed at 3.3 V |
| SN74AVC16245 | Higher speed (tpd = 2.2 ns at 3.3 V), supports 1.2 V to 3.6 V VCC, but lacks bus-hold circuitry | Requires external pullups on unused I/Os; better for ultra-low-latency FPGA interconnects | Select when sub-2.5 ns propagation is mandatory and board space permits external biasing components |
Compared with SN74LVC16245A and SN74AVC16245, the SN74ALVCH16245 uniquely combines 5.5-V tolerance, integrated bus-hold, and guaranteed ±24-mA drive across its full 1.65–3.6 V range-making it optimal for mixed-voltage industrial backplanes where reliability and BOM simplification are prioritized over marginal speed gains.
Availability
SN74ALVCH16245 is available at Aetrix Electronics and suitable for server backplanes, telecom line cards, LED display controllers, and motor control I/O expanders requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ALVCH16245 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 SN74ALVCH16245 belongs to TI's Widebus™ family of high-speed, low-voltage CMOS transceivers engineered for robust bidirectional data transfer in mixed-signal infrastructure equipment where voltage translation, noise immunity, and bus stability are critical.
FAQ
What is the maximum input voltage rating for SN74ALVCH16245?
The SN74ALVCH16245 supports an absolute maximum input voltage of 5.5 V on all I/O pins, regardless of VCC level. This allows safe interfacing with 5 V logic sources even when operating at 1.65 V to 3.6 V supply-enabling down-translation without external components. The specification is verified per Absolute Maximum Ratings table in SCES015M Rev M.
How does the bus-hold feature work on SN74ALVCH16245?
The SN74ALVCH16245 integrates active bus-hold circuitry on all A- and B-port I/O pins, which maintains a valid logic state (high or low) on undriven or floating inputs using internal feedback. This eliminates the need for external pullup or pulldown resistors-reducing BOM cost and PCB area. Bus-hold current is specified as ±45 µA at 2.3 V in the Electrical Characteristics table.
Can SN74ALVCH16245 be used for bidirectional communication between two different voltage domains?
Yes-the SN74ALVCH16245 supports true bidirectional level translation: its 5.5-V tolerant inputs accept signals from higher-voltage domains (e.g., 5 V), while its outputs swing rail-to-rail within the local VCC range (1.65–3.6 V). Direction is controlled independently per octal bank via DIR pins, making it ideal for asymmetric voltage interfaces in telecom infrastructure.
What are the thermal characteristics of SN74ALVCH16245 in TSSOP-48 package?
In the TSSOP-48 (DGG) package, the SN74ALVCH16245 has a junction-to-ambient thermal resistance (RθJA) of 70 °C/W. This value assumes standard JEDEC test conditions (1s pulse, 2-layer board). For continuous 16-bit switching at ±24 mA, thermal design must account for power dissipation up to 29 mW per output (per Operating Characteristics table), totaling ~464 mW worst-case.
Is SN74ALVCH16245 pin-compatible with other 16-bit transceivers in TI's portfolio?
The SN74ALVCH16245 shares identical pinout and function mapping with SN74LVC16245A and SN74AVC16245 in TSSOP-48, TVSOP-48, and SSOP-48 packages-enabling footprint reuse. However, electrical differences (e.g., bus-hold presence, input tolerance, drive strength) require validation in target application circuits before substitution.
SN74ALVCH16245KR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 56-VFBGA
- Packaging:
- Tape & Reel (TR)
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-BGA Microstar Junior (7x4.5)
SN74ALVCH16245KR FAQ
1.How can I place an order for SN74ALVCH16245KR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH16245KR 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 SN74ALVCH16245KR reliable?
The price and inventory of SN74ALVCH16245KR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16245KR is usually 5 days.
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SN74ALVCH16245KR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVCH16245KR 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 SN74ALVCH16245KR?
For technical support, including SN74ALVCH16245KR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16245KR requirements.
6.How does Aetrix verify that SN74ALVCH16245KR is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH16245KR 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 SN74ALVCH16245KR meets industry standards.
7.What is the process for return or replacement of SN74ALVCH16245KR?
All SN74ALVCH16245KR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16245KR, 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 SN74ALVCH16245KR part is unused and in its original packaging.
Return procedure for SN74ALVCH16245KR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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