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Texas Instruments SN74ALVCHR16245KR
- Part No.:
- SN74ALVCHR16245KR
- Manufacturer:
- Texas Instruments
- Package:
- 56-VFBGA
- Datasheet:
-
SN74ALVCHR16245KR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,622
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Product details
Overview
SN74ALVCHR16245KR from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 1.65-V to 3.6-V buses. It features ±12-mA output drive at 3.3 V, 4.2-ns max propagation delay, integrated 26-Ω series output resistors, and active bus-hold circuitry-enabling robust signal integrity in high-speed memory and peripheral interconnects.
For engineers reviewing the SN74ALVCHR16245KR datasheet, SN74ALVCHR16245KR pinout, SN74ALVCHR16245KR application, or SN74ALVCHR16245KR equivalent, key selection considerations include its VFBGA (ZQL) 48-pin package, dual-direction control via DIR/OE inputs, bus-hold elimination of external biasing, and compatibility with mixed-voltage LVTTL/ALVC logic systems.
Technical Context
This device implements two independent 8-bit transceiver sections, each with separate direction (DIR) and output-enable (OE) controls, allowing flexible A↔B or B↔A data flow per section. Its logic diagram confirms true noninverting operation and 3-state output behavior governed by OE-driven isolation and DIR-determined signal path polarity.
The internal bus-hold circuitry actively maintains valid logic states on undriven inputs without external resistors, while integrated 26-Ω series termination minimizes overshoot/undershoot across all 16 I/Os-eliminating need for discrete damping resistors in point-to-point or stubbed bus topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports mixed-voltage system interfacing across LVTTL, ALVC, and low-voltage CMOS domains |
| Max Propagation Delay | 4.2 ns at 3.3 V - enables reliable operation in 200+ MHz bus timing budgets |
| Output Drive | ±12 mA at 3.3 V - sufficient to drive 50-Ω transmission lines or fan-out to ≥10 LVTTL loads |
| Integrated Series Resistor | 26 Ω per output - reduces EMI and signal reflections without PCB layout overhead |
| Bus-Hold Current | ±45 µA at 3 V - maintains stable logic levels on floating inputs, eliminating pullup/pulldown components |
| ESD Protection | 2000-V HBM, 200-V MM - exceeds JEDEC standards for handling robustness in assembly and field environments |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and computing applications |
Pinout & Package
VFBGA package: ZQL (48-ball, 5.5 mm × 5.5 mm, 0.5-mm pitch), bottom-side solder ball array with standard JEDEC MO-220 footprint. Pin 1 located at corner marked by chamfered edge per TI mechanical drawing DGG0048A variant adapted for ZQL.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Determines data flow direction: DIR = L → B→A; DIR = H → A→B |
| 1OE, 2OE | Output-enable input (per 8-bit section) | OE = L → outputs active; OE = H → all outputs enter high-impedance state |
| 1A1–1A8, 2A1–2A8 | Port A data I/Os (input when DIR=H, output when DIR=L) | First 8-bit bus interface; driven from or sourced to A-side logic |
| 1B1–1B8, 2B1–2B8 | Port B data I/Os (input when DIR=L, output when DIR=H) | Second 8-bit bus interface; driven from or sourced to B-side logic |
| VCC, GND | Power and ground terminals (multiple distributed balls) | Decoupling-critical supply rails; 4 VCC and 4 GND balls minimize IR drop and noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω series output termination | Eliminates need for 16 discrete series resistors, reducing BOM count and PCB area in high-density layouts |
| Active bus-hold on all data inputs | Maintains valid logic state during hot-plug, power sequencing, or tri-state transitions-no external bias required |
| Wide 1.65-V to 3.6-V supply range | Enables direct interface between 1.8-V FPGAs, 2.5-V ASICs, and 3.3-V peripherals without level shifters |
| Low 4.2-ns propagation delay at 3.3 V | Supports >200-MHz data rates in synchronous bus architectures with margin for setup/hold timing |
| Latch-up immunity >250 mA | Guarantees robust operation under transient overvoltage or ground-bounce conditions per JESD17 |
Applications
| Memory Subsystem Interconnect | Peripheral Bridge Interface |
|---|---|
Use Scenario: Bidirectional data routing between DDR SDRAM controller and memory module in embedded computing platforms. IC Role / Device Role / Timing Role: Bus transceiver managing address/data strobe handshaking with precise 4.2-ns tpd alignment to meet JEDEC tAC/tOH timing windows. Use Value: Integrated 26-Ω termination ensures clean signal edges across 16-bit memory bus, reducing board-level reflection artifacts and enabling stable 166-MHz operation. |
Use Scenario: Level-shifting and isolation between 1.8-V SoC GPIO banks and 3.3-V USB PHY or PCIe endpoint peripherals. IC Role / Device Role / Timing Role: Voltage-tolerant transceiver providing direction-controlled data flow with bus-hold protection during peripheral reset or hot-unplug events. Use Value: Wide VCC range and bus-hold eliminate need for external level shifters and pull resistors-reducing component count and improving reliability in portable designs. |
| FPGA I/O Expansion | Industrial Backplane Interface |
Use Scenario: Expanding limited FPGA I/O count to drive multiple 8-bit parallel sensors or displays in test equipment. IC Role / Device Role / Timing Role: Dual-section transceiver configured as two independent 8-bit channels, each controlled by dedicated DIR/OE signals from FPGA fabric. Use Value: Low 4.2-ns delay preserves timing closure across FPGA-to-peripheral paths; 12-mA drive supports long trace runs on multi-layer PCBs. |
Use Scenario: Isolating and buffering control/status signals across modular backplane slots in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: High-reliability transceiver providing galvanically isolated signal translation between slot controllers and field I/O modules. Use Value: 250-mA latch-up immunity and 2000-V HBM ESD rating ensure resilience against industrial EMI and electrostatic discharge in factory-floor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | Same pinout (TSSOP-48), but lacks bus-hold and integrated 26-Ω resistors; requires external termination and biasing | Suitable only where board space allows discrete resistors and pullups, and where lower cost outweighs design simplification | Select if legacy LVC voltage range (1.65–3.6 V) suffices and bus-hold is not required |
| SN74AVC16245DGGR | Higher speed (2.9 ns tpd at 1.8 V), supports 1.2–3.6 V, but no bus-hold and no integrated series resistors | Better for ultra-low-voltage, high-frequency interfaces (e.g., mobile SoC subsystems), but increases layout complexity | Prefer when sub-3.3-V operation below 1.65 V is needed and external termination is acceptable |
Compared with SN74LVC16245ADGGR and SN74AVC16245DGGR, the SN74ALVCHR16245KR uniquely combines bus-hold, integrated 26-Ω termination, and industrial temperature range in a compact VFBGA-reducing total solution size and improving signal integrity without sacrificing voltage flexibility.
Availability
SN74ALVCHR16245KR is available at Aetrix Electronics and suitable for memory subsystem interconnect, FPGA I/O expansion, industrial backplane interface, and peripheral bridge interface requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for SN74ALVCHR16245KR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, scalability, and broad ecosystem support.
The SN74ALVCHR16245KR belongs to TI's Widebus™ family of high-speed, low-voltage bus interface ICs-designed specifically for robust, low-overhead data routing in memory, FPGA, and industrial control systems.
FAQ
What is the package type and dimensions of the SN74ALVCHR16245KR?
The SN74ALVCHR16245KR uses a VFBGA package designated ZQL: 48-ball, 5.5 mm × 5.5 mm body, 0.5-mm ball pitch, JEDEC MO-220 compliant. Its low-profile construction (max 1.2 mm height) supports high-density PCB layouts and automated assembly with standard reflow profiles (MSL Level-1).
Does the SN74ALVCHR16245KR require external pullup resistors on OE or DIR inputs?
No-external pullup resistors are not required on OE or DIR inputs of the SN74ALVCHR16245KR. These control inputs are CMOS-compatible and internally biased; however, TI recommends tying OE to VCC via a pullup resistor during power-up to guarantee high-impedance state until firmware initializes control logic.
How does the bus-hold feature function on the SN74ALVCHR16245KR?
The SN74ALVCHR16245KR incorporates active bus-hold circuitry on all A- and B-port data inputs, maintaining the last-valid logic state with ±45 µA hold current at 3 V. This eliminates need for external pullup/pulldown resistors and prevents floating-input metastability during hot-swap or power sequencing events.
Can the SN74ALVCHR16245KR operate reliably at 1.65 V supply?
Yes-the SN74ALVCHR16245KR is fully specified from 1.65 V to 3.6 V. At 1.65 V, it delivers guaranteed 2-mA low-level output drive and 1.2-V high-level output voltage, supporting interoperability with 1.8-V logic families while maintaining 4.9-ns max propagation delay per datasheet SCES064G.
What is the thermal performance of the SN74ALVCHR16245KR in its ZQL package?
The SN74ALVCHR16245KR in ZQL package has a junction-to-ambient thermal resistance (θJA) of 42°C/W, significantly lower than TSSOP (63°C/W) or SSOP (70°C/W) variants. This enables higher sustained power dissipation in compact industrial enclosures without forced airflow or heatsinking.
SN74ALVCHR16245KR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCHR
- 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:
- 12mA, 12mA
- 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)
SN74ALVCHR16245KR FAQ
1.How can I place an order for SN74ALVCHR16245KR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCHR16245KR 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 SN74ALVCHR16245KR reliable?
The price and inventory of SN74ALVCHR16245KR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCHR16245KR is usually 5 days.
3.What payment methods are accepted for SN74ALVCHR16245KR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVCHR16245KR transactions.
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4.How is shipping managed for SN74ALVCHR16245KR?
SN74ALVCHR16245KR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVCHR16245KR 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 SN74ALVCHR16245KR?
For technical support, including SN74ALVCHR16245KR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCHR16245KR requirements.
6.How does Aetrix verify that SN74ALVCHR16245KR is sourced from the original manufacturer or authorized distributors?
All SN74ALVCHR16245KR 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 SN74ALVCHR16245KR meets industry standards.
7.What is the process for return or replacement of SN74ALVCHR16245KR?
All SN74ALVCHR16245KR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCHR16245KR, 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 SN74ALVCHR16245KR part is unused and in its original packaging.
Return procedure for SN74ALVCHR16245KR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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