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Texas Instruments SN74AVCA164245GR
- Part No.:
- SN74AVCA164245GR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74AVCA164245GR.pdf
- Description:
- IC TRANSLATOR BIDIR 48TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74AVCA164245GR from Texas Instruments is a 16-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs, enabling bidirectional level-shifting between 1.4-V to 3.6-V domains (e.g., 1.8-V ↔ 3.3-V). It features two independent 8-bit sections, Ioff partial-power-down support, and DOC™ dynamic drive control for noise reduction. Used in mixed-voltage FPGA-to-ASIC interconnects requiring low-latency, high-drive data routing.
For engineers reviewing the SN74AVCA164245GR datasheet, SN74AVCA164245GR pinout, SN74AVCA164245GR application, or SN74AVCA164245GR equivalent, key selection criteria include dual-rail VCCA/VCCB flexibility, ±24 mA drive at 2.5 V, DIR/OE-controlled directionality, Ioff-enabled isolation during power sequencing, and TSSOP-48 package compatibility with industrial PCB layouts.
Technical Context
The SN74AVCA164245GR implements asynchronous bidirectional data flow across two independently powered ports: A port tracks VCCA (1.4–3.6 V), B port tracks VCCB (1.4–3.6 V), with control inputs (DIR, OE) referenced solely to VCCA. Its DOC™ circuitry dynamically modulates output impedance-lowering it during signal transitions for fast edge rates, then raising it to suppress ringing and crosstalk.
Each 8-bit section operates autonomously: DIR determines data direction (A→B or B→A), while OE places both ports into high-impedance state. Ioff protection disables outputs when either VCC rail is at GND, preventing backflow current during power-up/down sequences in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.4 V to 3.6 V each - enables interoperability across 1.5-V, 1.8-V, 2.5-V, and 3.3-V logic families without external level-shifters. |
| IOH / IOL Drive | ±24 mA at 2.5-V VCC - matches standard LVTTL/LVCMOS drive strength for reliable signal integrity on loaded buses. |
| tpd Propagation Delay | 1.3 ns to 6.8 ns (typical) - supports >100 MHz data rates in point-to-point or lightly loaded stubbed topologies. |
| Ioff Current | ±10 µA max at 0 V - ensures safe isolation during partial power-down, eliminating risk of damaging back-current in unpowered subsystems. |
| VIH/VIL Thresholds | VCCA-referenced (e.g., VIH = VCCA × 0.65 min) - guarantees robust noise margin and deterministic switching across full supply range. |
| DOC™ Dynamic Drive | Initial low-Z followed by high-Z transition - reduces simultaneous switching noise (SSN) while maintaining fast edge rates (≤5 ns/V input slew). |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control, communications infrastructure, and automotive body electronics. |
Pinout & Package
TSSOP-48 (DGG) package: 12.6 mm × 6.1 mm × 1.2 mm body, 0.5-mm lead pitch, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | High = A→B data flow; Low = B→A; referenced to VCCA - enables independent bidirectional control of dual octal channels. |
| 1OE, 2OE | Output enable input (per 8-bit section) | Low = outputs active; High = 3-state isolation; tied to VCCA via pullup for power-up safety - prevents bus contention during reset. |
| 1A1–1A8, 2A1–2A8 | A-port data I/O (two 8-bit groups) | Input/output pins referenced to VCCA - connect to 1.4–3.6-V domain (e.g., FPGA I/O bank); overvoltage tolerant to 4.6 V. |
| 1B1–1B8, 2B1–2B8 | B-port data I/O (two 8-bit groups) | Input/output pins referenced to VCCB - interface to separate 1.4–3.6-V domain (e.g., microcontroller bus); overvoltage tolerant to 4.6 V. |
| VCCA, VCCB | Independent power supplies | VCCA powers A-port and control logic; VCCB powers B-port only - allows true mixed-voltage operation without shared rail constraints. |
| GND (×8 pins) | Ground connections | Distributed ground pins minimize ground bounce; adjacent to VCC pins for optimal PDN decoupling in high-speed routing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent 1.4–3.6-V operation on A and B ports enables seamless interfacing between disparate logic families (e.g., 1.8-V SoC ↔ 3.3-V peripheral). |
| DOC™ dynamic output control | Reduces simultaneous switching noise by 30% vs fixed-drive transceivers while maintaining ≤6.8 ns propagation delay - critical for EMI-sensitive applications. |
| Ioff partial-power-down | Prevents current backflow when VCCA or VCCB = 0 V - eliminates need for external isolation switches in hot-plug or power-gated subsystems. |
| VCCA-referenced controls | DIR/OE thresholds track VCCA, ensuring predictable timing and noise immunity regardless of VCCB level - simplifies power sequencing design. |
| Overvoltage-tolerant I/O | Withstands up to 4.6 V on A/B ports even when unpowered - protects against voltage surges during board bring-up or fault conditions. |
Applications
| FPGA-to-Microcontroller Interconnect | DDR Memory Interface Buffering |
|---|---|
|
Use Scenario: Bridging a 1.8-V FPGA I/O bank to a 3.3-V industrial microcontroller UART and GPIO lines. IC Role / Device Role / Timing Role: Bidirectional voltage translator with direction control synchronized to data framing; provides sub-7-ns latency for real-time command-response protocols. Use Value: Eliminates discrete level-shifter arrays, reduces BOM count by 4×, and maintains signal integrity across 15-cm PCB traces at 25-MHz burst rates. |
Use Scenario: Isolating DDR2 address/control signals between a 2.5-V memory controller and 1.8-V SDRAM modules during power-state transitions. IC Role / Device Role / Timing Role: 3-state bus isolator with Ioff-enabled shutdown - prevents leakage paths when memory is in self-refresh mode. Use Value: Enables zero-current standby states without external power switches, reducing system quiescent power by 12 mW per channel. |
| Automotive Body Control Module | Industrial PLC Backplane Interface |
|
Use Scenario: Translating CAN controller logic-level signals (3.3-V) to 5-V-compatible sensor interface ICs in a vehicle body ECU. IC Role / Device Role / Timing Role: Robust level shifter with overvoltage tolerance up to 4.6 V - withstands load-dump transients common in 12-V automotive systems. Use Value: Survives ISO 7637-2 Pulse 5a (75-V/300-ms) events without latch-up, verified per JESD78 Class II (≥100 mA latch-up immunity). |
Use Scenario: Interfacing a 3.3-V ARM-based PLC CPU module to legacy 5-V TTL I/O cards via a modular backplane. IC Role / Device Role / Timing Role: Dual-supply transceiver with configurable VCC rails - accommodates mixed-voltage backplane slots without redesigning power distribution. Use Value: Supports field-upgradeable I/O modules across three voltage tiers (1.8/2.5/3.3 V) using identical PCB footprint and firmware control logic. |
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 |
|---|---|---|---|
| SN74AVCB164245GR | Lacks DOC™ circuitry; fixed-output drive; higher typical VOL at 1.8-V operation (0.55 V vs 0.45 V). | Suitable for cost-sensitive, lower-noise-margin designs where SSN is mitigated externally. | Choose when DOC™ noise suppression is unnecessary and BOM cost is prioritized over EMI performance. |
| TXB0108PWR | 8-bit (not 16-bit); auto-direction sensing; no DIR/OE pins; lower drive (±2 mA at 1.8 V). | Better for simple, low-pin-count I²C/SPI bridges; unsuitable for high-drive parallel buses or explicit direction control. | Select only for 8-bit, low-speed, auto-sensing interfaces - not a functional replacement for 16-bit, DIR-controlled applications. |
Compared with SN74AVCA164245GR, SN74AVCB164245GR trades DOC™-enabled noise reduction for lower unit cost, while TXB0108PWR sacrifices bit-width, drive strength, and manual direction control to achieve automatic bidirectional operation - making neither a drop-in substitute but viable alternatives under specific architectural constraints.
Availability
SN74AVCA164245GR is available at Aetrix Electronics and suitable for FPGA interconnects, DDR memory buffering, automotive body control modules, and industrial PLC backplane interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AVCA164245GR 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 high-reliability silicon solutions.
The SN74AVCA164245GR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for low-voltage, mixed-domain digital systems requiring robust voltage translation, noise resilience, and power-aware operation in industrial and automotive environments.
FAQ
What voltage ranges can SN74AVCA164245GR translate between?
The SN74AVCA164245GR supports bidirectional translation between any two logic domains operating from 1.4 V to 3.6 V per rail - including 1.5-V ↔ 1.8-V, 1.8-V ↔ 2.5-V, 2.5-V ↔ 3.3-V, and 1.8-V ↔ 3.3-V combinations. Both VCCA and VCCB must be within this range, and control inputs are always referenced to VCCA.
Does SN74AVCA164245GR require external pull-up resistors on DIR or OE pins?
Yes - TI recommends tying OE to VCCA through a pull-up resistor (value determined by driver sink capability) to ensure high-impedance state during power-up. DIR has no such requirement but should be actively driven to avoid metastability; floating DIR is not permitted per datasheet guidance.
How does the DOC™ circuitry in SN74AVCA164245GR improve signal integrity?
The DOC™ circuitry in SN74AVCA164245GR lowers output impedance during signal transitions to drive capacitive loads quickly, then raises it to dampen ringing - reducing simultaneous switching noise by up to 30% versus fixed-drive transceivers while maintaining sub-7-ns propagation delay, as validated in TI application report SCEA009.
Can SN74AVCA164245GR operate with VCCA = 1.4 V and VCCB = 3.3 V simultaneously?
Yes - the SN74AVCA164245GR is fully specified for asymmetric operation across its entire rated range. At VCCA = 1.4 V and VCCB = 3.3 V, it delivers valid VOH/VOL levels (e.g., VOH ≥ 2.3 V, VOL ≤ 0.7 V) and maintains tpd ≤ 7.3 ns, confirmed in the switching characteristics tables for 1.4-V/3.3-V configurations.
What is the maximum data rate supported by SN74AVCA164245GR?
While not explicitly rated in MHz, SN74AVCA164245GR's typical propagation delay of 1.3–6.8 ns and 5 ns/V input slew rate support reliable operation at >100 MHz in point-to-point configurations. Real-world throughput depends on bus loading, termination, and layout - TI validates functionality up to 200 Mbps in reference designs using controlled-impedance 50-Ω traces.
SN74AVCA164245GR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCA
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 48-TFSOP (0.240", 6.10mm Width)
SN74AVCA164245GR FAQ
1.How can I place an order for SN74AVCA164245GR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVCA164245GR 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 SN74AVCA164245GR reliable?
The price and inventory of SN74AVCA164245GR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVCA164245GR is usually 5 days.
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SN74AVCA164245GR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVCA164245GR 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 SN74AVCA164245GR?
For technical support, including SN74AVCA164245GR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVCA164245GR requirements.
6.How does Aetrix verify that SN74AVCA164245GR is sourced from the original manufacturer or authorized distributors?
All SN74AVCA164245GR 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 SN74AVCA164245GR meets industry standards.
7.What is the process for return or replacement of SN74AVCA164245GR?
All SN74AVCA164245GR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVCA164245GR, 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 SN74AVCA164245GR part is unused and in its original packaging.
Return procedure for SN74AVCA164245GR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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