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Texas Instruments SN74AVCAH164245GR
- Part No.:
- SN74AVCAH164245GR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74AVCAH164245GR.pdf
- Description:
- IC TRANSLATOR BIDIR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,188
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Product details
Overview
SN74AVCAH164245 from Texas Instruments is a 16-bit dual-supply bus transceiver with configurable voltage translation, supporting independent 1.4-V to 3.6-V operation on A and B ports, ±24-mA dynamic drive capability, bus-hold circuitry, and Ioff partial-power-down protection. It enables bidirectional level-shifting between 1.5-V, 1.8-V, 2.5-V, and 3.3-V domains in memory expansion and mixed-voltage SoC interconnects.
For engineers reviewing the SN74AVCAH164245 datasheet, SN74AVCAH164245 pinout, SN74AVCAH164245 application, or SN74AVCAH164245 equivalent, key selection considerations include dual-rail VCCA/VCCB supply flexibility, DIR/OE control logic referenced to VCCA, DOC™-enabled noise-suppressed switching, and TSSOP-48 package compatibility with high-density PCB layouts.
Technical Context
This device implements two independent 8-bit transceiver sections (1DIR/1OE and 2DIR/2OE), each supporting asynchronous bidirectional data flow controlled by DIR and enabled/disabled via OE. Both ports operate across overlapping 1.4-V to 3.6-V supply ranges, with control inputs (DIR, OE) referenced strictly to VCCA.
The integrated DOC™ (Dynamic Output Control) circuitry dynamically modulates output impedance during signal transitions-lowering it initially for strong edge drive (±24 mA), then raising it to suppress ringing and crosstalk without sacrificing propagation speed. Bus-hold circuitry actively maintains unused data inputs at valid logic levels, eliminating external bias resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.4 V to 3.6 V each - enables universal translation between 1.5-V, 1.8-V, 2.5-V, and 3.3-V logic domains |
| Dynamic Drive | ±24 mA at 2.5-V VCC - delivers standard-output strength while maintaining low-noise operation via DOC™ |
| tpd (max) | 8.6 ns (VCCA = 1.8 V, VCCB = 3.3 V) - ensures timing compliance in high-speed memory and peripheral buses |
| Ioff | ±10 µA - prevents backflow current when either VCC rail is at GND, enabling safe partial-power-down sequencing |
| Bus-Hold Current | ±100 µA to ±525 µA (VIN = 0–VCC) - sustains stable logic states on floating inputs without external components |
| ESD Rating | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-grade robustness requirements for board-level handling |
| Operating Temp | –40°C to +85°C - qualified for extended-temperature industrial and automotive under-hood applications |
Pinout & Package
TSSOP-48 (DGG) package: 12.6 mm × 6.2 mm × 1.2 mm body, 0.5-mm pitch, lead-free NiPdAu finish, MSL Level-1 (260°C peak reflow), RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Logic level determines data flow direction: L = B→A, H = A→B; referenced to VCCA |
| 1OE, 2OE | Output enable input (per 8-bit section) | Active-Low: L enables transceiver, H places both A/B ports in high-impedance isolation state |
| 1A1–1A8, 2A1–2A8 | A-port data I/O terminals | Track VCCA supply; support 1.4–3.6 V logic; include bus-hold on all inputs |
| 1B1–1B8, 2B1–2B8 | B-port data I/O terminals | Track VCCB supply; support 1.4–3.6 V logic; overvoltage-tolerant up to 4.6 V |
| VCCA, VCCB | Independent power supplies | VCCA powers control inputs and A-port circuitry; VCCB powers B-port circuitry; no shared rail required |
| GND | Ground reference | Four dedicated ground pins (pins 4, 10, 23, 35) minimize ground bounce in high-speed switching |
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 |
| DOC™ output architecture | Dynamically adjusts output impedance during transitions to reduce simultaneous switching noise without slowing tpd |
| Integrated bus-hold | Eliminates need for external pullup/pulldown resistors on unused data lines, reducing BOM count and layout area |
| Ioff protection | Disables outputs and blocks current flow when either VCC rail is powered down, preventing system-level damage |
| Overvoltage-tolerant I/O | B-port pins tolerate up to 4.6 V regardless of VCCB, allowing safe connection to higher-voltage peripherals |
Applications
| Memory Expansion Interface | FPGA-to-ASIC Interconnect |
|---|---|
|
Use Scenario: Connecting a 1.8-V FPGA I/O bank to a 3.3-V parallel NOR flash memory array in an embedded controller. IC Role / Device Role / Timing Role: Bidirectional level translator managing address/data/control signals with sub-9-ns propagation delay and matched timing paths. Use Value: Eliminates discrete level-shifter ICs and external biasing, reducing component count while maintaining setup/hold timing margins. |
Use Scenario: Enabling communication between a 2.5-V ASIC subsystem and a 1.5-V low-power sensor hub MCU in a battery-operated IoT node. IC Role / Device Role / Timing Role: Dual-rail transceiver providing isolated, direction-controlled data transfer with bus-hold stabilization on idle lines. Use Value: Prevents floating inputs during sleep mode and supports asymmetric voltage domains without custom power sequencing. |
| Industrial PLC Backplane | Automotive ADAS Sensor Hub |
|
Use Scenario: Interfacing multiple 3.3-V fieldbus controllers to a 2.5-V central processor unit across a ruggedized backplane. IC Role / Device Role / Timing Role: Robust 16-bit transceiver with ±24-mA drive, ESD-hardened I/O, and Ioff-enabled hot-swap capability. Use Value: Ensures signal integrity under noisy industrial environments and allows module replacement without full system shutdown. |
Use Scenario: Aggregating camera, radar, and ultrasonic sensor data streams into a 1.8-V domain ADAS SoC using a compact, thermally efficient interface. IC Role / Device Role / Timing Role: Low-profile TSSOP-48 transceiver delivering fast, low-noise translation with minimal thermal dissipation (Cpd = 14 pF). Use Value: Meets automotive temperature range (–40°C to +85°C) and reduces PCB real estate versus discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH16T245DGGR | Single-supply (1.2–3.6 V), no VCCA/VCCB separation; lacks DOC™ and bus-hold | Suitable only for same-voltage-domain buffering; not for mixed-voltage translation | Select when cost and simplicity outweigh dual-rail flexibility and noise control needs |
| TXB0108PWR | Auto-direction sensing (no DIR pin); lower drive (±2 mA); smaller 20-pin VQFN package | Optimized for low-pin-count, low-power I²C/SPI translation; not for wide parallel buses | Choose for space-constrained, low-bandwidth interfaces where automatic direction detection is preferred |
Compared with SN74AVCAH164245, SN74AVCH16T245DGGR requires identical supply rails and offers no voltage translation or DOC™ noise suppression, while TXB0108PWR trades 16-bit width and manual direction control for automatic sensing and ultra-low power-making SN74AVCAH164245 uniquely suited for high-fidelity, mixed-voltage parallel bus bridging.
Availability
SN74AVCAH164245 is available at Aetrix Electronics and suitable for memory expansion interfaces, FPGA-to-ASIC interconnects, and industrial PLC backplanes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74AVCAH164245 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 decades of expertise in logic interface solutions.
The SN74AVCAH164245 belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for high-integrity, mixed-voltage data communication in industrial, computing, and automotive systems.
FAQ
What voltage ranges does the SN74AVCAH164245 support on its A and B ports?
The SN74AVCAH164245 supports independent supply voltages from 1.4 V to 3.6 V on both VCCA (A port) and VCCB (B port), enabling translation between common logic levels including 1.5 V, 1.8 V, 2.5 V, and 3.3 V. Control inputs (DIR, OE) are referenced solely to VCCA, and both ports tolerate up to 4.6 V on I/O pins regardless of supply voltage.
How does the DOC™ circuitry in the SN74AVCAH164245 improve signal integrity?
The DOC™ (Dynamic Output Control) circuitry in the SN74AVCAH164245 dynamically lowers output impedance during signal transitions to deliver strong edge drive (±24 mA), then raises impedance mid-transition to suppress ringing and crosstalk. This maintains fast propagation delay (as low as 1.3 ns) while reducing simultaneous switching noise-critical for high-density parallel bus designs.
Can the SN74AVCAH164245 operate safely if one supply rail is powered down?
Yes. The SN74AVCAH164245 features Ioff circuitry that disables outputs and limits leakage to ±10 µA when either VCCA or VCCB is at GND. This prevents damaging current backflow and places both A and B ports in high-impedance state, supporting safe partial-power-down sequences in modular systems.
Does the SN74AVCAH164245 require external pullup or pulldown resistors on data lines?
No. The SN74AVCAH164245 integrates active bus-hold circuitry on all data inputs (A and B ports), which maintains unused or floating inputs at valid logic levels. TI explicitly advises against using external pullup/pulldown resistors with this feature, as they may interfere with bus-hold functionality and increase power consumption.
What is the package type and thermal performance of the SN74AVCAH164245GR variant?
The SN74AVCAH164245GR uses a TSSOP-48 (DGG) package measuring 12.6 mm × 6.2 mm × 1.2 mm with 0.5-mm pitch. Its thermal impedance is θJA = 70°C/W, and it is rated for MSL Level-1 (unlimited floor life at ≤30°C/60% RH), making it suitable for automated assembly and high-reliability industrial applications.
SN74AVCAH164245GR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCAH
- 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)
SN74AVCAH164245GR FAQ
1.How can I place an order for SN74AVCAH164245GR through Aetrix?
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5.How can I obtain technical support or documentation for SN74AVCAH164245GR?
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6.How does Aetrix verify that SN74AVCAH164245GR is sourced from the original manufacturer or authorized distributors?
All SN74AVCAH164245GR 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 SN74AVCAH164245GR meets industry standards.
7.What is the process for return or replacement of SN74AVCAH164245GR?
All SN74AVCAH164245GR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVCAH164245GR, 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 SN74AVCAH164245GR part is unused and in its original packaging.
Return procedure for SN74AVCAH164245GR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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