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Texas Instruments SN74AVCA164245KR
- Part No.:
- SN74AVCA164245KR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74AVCA164245KR.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,849
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Product details
Overview
SN74AVCA164245KR from Texas Instruments is a 16-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs, designed for bidirectional level-shifting between 1.4-V to 3.6-V domains (e.g., 1.8-V ↔ 3.3-V). It features independent A/B ports tracking VCCA and VCCB, Ioff partial-power-down support, DOC™ dynamic drive control, and ±24-mA output drive at 2.5-V VCC. Used in mixed-voltage memory interfaces and FPGA-to-ASIC interconnects.
For engineers reviewing the SN74AVCA164245KR datasheet, SN74AVCA164245KR pinout, SN74AVCA164245KR application, or SN74AVCA164245KR equivalent, key selection criteria include dual-rail voltage flexibility (1.4–3.6 V per rail), direction-control logic behavior, Ioff-enabled isolation during power sequencing, 3.1-ns minimum propagation delay (VCCA=3.3 V, VCCB=3.3 V), and VFBGA-ZQL package compatibility with high-density PCB layouts.
Technical Context
This device implements asynchronous bidirectional data flow controlled by DIR and OE inputs per 8-bit section, with control pins referenced strictly to VCCA. Its DOC™ circuitry dynamically modulates output impedance during transitions to reduce noise while maintaining ±24-mA drive capability at 2.5-V VCC.
The Ioff feature disables outputs when either VCCA or VCCB is at GND, preventing back-current flow. Input thresholds (VIH/VIL) scale with VCCA, enabling robust operation across mixed-supply systems without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.4 V to 3.6 V each - enables universal translation among 1.5-V, 1.8-V, 2.5-V, and 3.3-V logic domains |
| IOH / IOL | ±24 mA at 2.5-V VCC - matches standard-output drive strength for signal integrity in loaded buses |
| tpd (max) | 7.3 ns (VCCA=3.3 V, VCCB=3.3 V) - supports >100-MHz data rates in short-trace applications |
| Ioff Current | ±10 µA - ensures safe isolation during partial power-down without external pull-ups |
| VIH/VIL Reference | Referenced to VCCA - eliminates need for level-shifted control signals in asymmetric supply configurations |
| ESD Rating | 2000-V HBM - meets industrial-grade robustness requirements for board-level handling |
| Operating Temp | –40°C to +85°C - qualified for extended-temperature embedded and automotive body electronics |
Pinout & Package
VFBGA package (ZQL), 48-pin, 5.5 mm × 6.0 mm, 0.5-mm pitch, bottom-side ball layout. RoHS-compliant, MSL Level-3 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Determines data flow direction: L = B→A, H = A→B; referenced to VCCA |
| 1OE, 2OE | Output enable input (per 8-bit section) | L = outputs active, H = 3-state isolation; tied to VCCA via pull-up for power-up safety |
| 1A1–1A8, 2A1–2A8 | A-port data I/O | Track VCCA supply; tolerate up to VCCA + 0.5 V in driven state |
| 1B1–1B8, 2B1–2B8 | B-port data I/O | Track VCCB supply; tolerate up to VCCB + 0.5 V in driven state |
| VCCA, VCCB | Independent power rails | Enable simultaneous operation at different voltages (e.g., VCCA=1.8 V, VCCB=3.3 V) |
| GND | Ground reference | Multiple dedicated ground balls minimize ground bounce in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Each port operates independently from 1.4 V to 3.6 V - eliminates external level shifters in multi-voltage SoC interconnects |
| DOC™ dynamic drive control | Initial low-impedance drive followed by impedance rise - reduces simultaneous switching noise without sacrificing edge rate |
| Ioff partial-power-down | Outputs disable automatically if VCCA or VCCB = GND - prevents backfeed current during hot-swap or staggered power sequencing |
| Voltage-tolerant I/O | Inputs/outputs withstand up to 4.6 V regardless of rail voltage - simplifies interface to legacy 5-V peripherals via clamping |
| Configurable control referencing | All control inputs (DIR/OE) referenced to VCCA only - avoids need for separate control-rail regulators or translators |
Applications
| Mobile Baseband Interface | FPGA-to-ASIC Data Bridge |
|---|---|
Use Scenario: Interfacing 1.8-V baseband processor with 3.3-V RF transceiver IC in LTE modem design. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing command/status/data exchange on shared parallel bus. Use Value: Eliminates discrete level-shifter ICs and associated layout area; Ioff prevents current leakage during processor sleep mode. |
Use Scenario: Connecting 2.5-V FPGA I/O banks to 3.3-V ASIC peripheral controller in industrial PLC module. IC Role / Device Role / Timing Role: Asynchronous bus transceiver enabling clock-domain crossing with direction-controlled data flow. Use Value: DOC™ circuitry suppresses ground bounce on dense PCBs; 3.1-ns tpd supports 100+ MHz handshaking protocols. |
| DDR Memory Subsystem Isolation | Automotive Infotainment SoC Interconnect |
Use Scenario: Isolating 1.5-V DDR3 SDRAM controller from 2.5-V PMIC management bus in automotive head unit. IC Role / Device Role / Timing Role: 3-state enabled bus isolator activated during memory initialization or power-state transitions. Use Value: Ioff blocks reverse current during VDDQ ramp-up; ±24-mA drive ensures clean signal edges into capacitive memory bus loads. |
Use Scenario: Translating control signals between 1.8-V infotainment SoC and 3.3-V CAN/LIN transceiver cluster. IC Role / Device Role / Timing Role: Voltage-translating buffer for GPIO, reset, and interrupt lines requiring rail-agnostic logic levels. Use Value: VIH/VIL scaling with VCCA allows direct connection to SoC GPIO without external resistive dividers; –40°C to +85°C rating ensures reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCB164245KR | Supports 1.2-V to 3.6-V rails (wider low-voltage range); identical pinout and DOC™ functionality | Better suited for sub-1.4-V core logic (e.g., advanced mobile SoCs) but requires tighter VCC tolerance control | Select when interfacing with 1.2-V or 1.35-V domains; otherwise SN74AVCA164245KR offers broader margin at 1.4-V minimum |
| TXB0108PWR | 8-bit, auto-direction sensing, no DIR/OE pins; 1.2-V to 3.6-V rails; smaller TSSOP-20 package | Eliminates direction-control logic but lacks 3-state isolation and high-drive capability (±24 mA) | Choose for space-constrained, low-pin-count applications where automatic direction detection suffices and drive strength < ±8 mA is acceptable |
Compared with SN74AVCB164245KR and TXB0108PWR, SN74AVCA164245KR provides optimal balance of 16-bit width, deterministic direction control, industrial temperature range, and high-current drive-making it preferred for fixed-protocol, high-reliability bus bridging where manual DIR management is acceptable and layout density permits VFBGA placement.
Availability
SN74AVCA164245KR is available at Aetrix Electronics and suitable for FPGA-to-ASIC interconnects, automotive infotainment subsystems, and DDR memory isolation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AVCA164245KR 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 high-reliability interface solutions.
The SN74AVCA164245KR belongs to TI's Widebus™ family of voltage-translating transceivers, engineered specifically for robust, low-noise bidirectional communication across heterogeneous voltage domains in space-constrained, thermally demanding applications.
FAQ
What is the minimum operating voltage for SN74AVCA164245KR on each rail?
The SN74AVCA164245KR supports VCCA and VCCB down to 1.4 V each, as specified in the Recommended Operating Conditions table. Operation below 1.4 V is not guaranteed and may result in undefined logic thresholds or reduced noise margins. The device is not rated for 1.2-V operation-use SN74AVCB164245KR for that requirement. All electrical characteristics in the datasheet are validated within the 1.4-V to 3.6-V range.
How does the Ioff feature protect the SN74AVCA164245KR during power sequencing?
The Ioff circuitry in the SN74AVCA164245KR disables all outputs when either VCCA or VCCB is at GND, limiting Ioff current to ±10 µA. This prevents damaging back-current flow from a powered rail into a powered-down domain-critical during staggered power-up/down in multi-rail systems. No external components are needed; the function activates automatically based on rail voltage detection.
Can SN74AVCA164245KR translate between 1.8-V and 5-V logic levels?
No. While the SN74AVCA164245KR inputs tolerate up to 4.6 V (absolute max), its output high voltage VOH is limited to VCCO – 0.2 V under load. Driving a true 5-V bus requires VCCB = 5 V, which exceeds the 3.6-V maximum rating. For 1.8-V ↔ 5-V translation, use a dedicated 5-V-tolerant translator like SN74LVC8T245 with appropriate level-shifting topology.
What is the purpose of DOC™ circuitry in SN74AVCA164245KR?
DOC™ (Dynamic Output Control) in the SN74AVCA164245KR temporarily lowers output impedance at signal transition onset to deliver peak current (equivalent to ±24 mA), then raises impedance mid-transition to suppress ringing and reduce simultaneous switching noise. This maintains fast edge rates while improving signal integrity on unterminated or lightly loaded buses-without requiring external series termination.
Is SN74AVCA164245KR pin-compatible with other ZQL-package transceivers?
SN74AVCA164245KR uses the ZQL VFBGA package (48-ball, 0.5-mm pitch, 5.5 mm × 6.0 mm), which is mechanically identical to SN74AVCB164245KR and SN74LVC164245KR in the same footprint. However, pin functions differ: control inputs on SN74AVCA164245KR are VCCA-referenced, whereas SN74LVC164245KR uses VCC-only referencing. Direct replacement requires schematic and layout verification.
SN74AVCA164245KR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCA
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 2
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 1.4 V ~ 3.6 V
- Voltage - VCCB:
- 1.4 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-VFBGA
SN74AVCA164245KR FAQ
1.How can I place an order for SN74AVCA164245KR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVCA164245KR 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 SN74AVCA164245KR reliable?
The price and inventory of SN74AVCA164245KR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVCA164245KR is usually 5 days.
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SN74AVCA164245KR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVCA164245KR 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 SN74AVCA164245KR?
For technical support, including SN74AVCA164245KR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVCA164245KR requirements.
6.How does Aetrix verify that SN74AVCA164245KR is sourced from the original manufacturer or authorized distributors?
All SN74AVCA164245KR 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 SN74AVCA164245KR meets industry standards.
7.What is the process for return or replacement of SN74AVCA164245KR?
All SN74AVCA164245KR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVCA164245KR, 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 SN74AVCA164245KR part is unused and in its original packaging.
Return procedure for SN74AVCA164245KR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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