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Texas Instruments SN74AVCB164245KR
- Part No.:
- SN74AVCB164245KR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74AVCB164245KR.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 56BGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74AVCB164245 from Texas Instruments is a 16-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs, designed for bidirectional asynchronous data transfer between mixed-voltage buses (1.4 V to 3.6 V). It features independent A and B ports tracking VCCA and VCCB, Ioff support for partial-power-down mode, DOC™ circuitry for dynamic drive/noise reduction, and operates across –40°C to 85°C.
For engineers reviewing the SN74AVCB164245 datasheet, SN74AVCB164245 pinout, SN74AVCB164245 application, or SN74AVCB164245 equivalent, key selection criteria include dual-rail voltage flexibility (1.4–3.6 V per rail), ±24 mA output drive, Ioff-enabled isolation during power sequencing, and VFBGA-56 (ZQL) package compatibility with high-density PCB layouts.
Technical Context
The SN74AVCB164245 implements two independent 8-bit transceiver sections (1DIR/1OE and 2DIR/2OE), each supporting bidirectional translation between A and B ports via direction-control logic. Control inputs (DIR, OE) are referenced to VCCB, ensuring consistent threshold behavior across supply combinations.
Its DOC™ circuitry dynamically modulates output impedance during signal transitions-lowering impedance initially for strong edge drive (±24 mA), then raising it to suppress ringing and crosstalk. Ioff protection disables outputs when either VCCA or VCCB = GND, preventing backflow current in partial-power-down systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage range per rail | 1.4 V to 3.6 V for both VCCA and VCCB - enables translation among 1.5 V, 1.8 V, 2.5 V, and 3.3 V domains without level shifters |
| Output drive | ±24 mA at 3.3 V - supports driving standard CMOS loads with fast edge rates and low skew |
| Propagation delay | 1.3 ns to 7.6 ns (VCCA/VCCB = 1.5–3.3 V) - ensures timing compliance in high-speed parallel bus interfaces |
| Ioff current | ±10 µA max at 0 V supply - guarantees safe isolation during hot-insertion or staggered power-up sequences |
| ESD rating | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-grade robustness requirements for board-level handling |
| Operating temperature | –40°C to +85°C - qualified for extended-temperature commercial and industrial applications |
Pinout & Package
VFBGA-56 package (ZQL), 7.0 mm × 4.5 mm × 1.0 mm body, 0.5 mm ball pitch, Pb-free, moisture sensitivity level 3 (MSL-3 @ 260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Determines data flow direction per 8-bit section (L = B→A, H = A→B); referenced to VCCB |
| 1OE, 2OE | Output enable input | Active-low; places corresponding port outputs in high-impedance state when high; tied to VCCB via pullup for power-up safety |
| 1A1–1A8, 2A1–2A8 | A-port data I/O | Track VCCA supply; tolerate up to VCCA + 0.5 V in active state; overvoltage-tolerant to 4.6 V |
| 1B1–1B8, 2B1–2B8 | B-port data I/O | Track VCCB supply; tolerate up to VCCB + 0.5 V in active state; overvoltage-tolerant to 4.6 V |
| VCCA, VCCB | Power supplies | Independent rails; each accepts 1.4–3.6 V; must be decoupled locally; no sequencing requirement |
| GND | Ground reference | Multiple dedicated ground balls (12 total) minimize ground bounce and improve noise immunity |
| NC | No internal connection | 7 pins (A1, A3–A6, K2–K4) - must remain unconnected; no routing or stitching required |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Full 1.4–3.6 V operation on both A and B ports enables seamless interconnection of heterogeneous logic families without external translators |
| DOC™ dynamic output control | Reduces simultaneous switching noise by lowering output impedance during transition edges, then increasing it to damp ringing - improves signal integrity without external termination |
| Ioff partial-power-down support | Prevents damaging current backflow when either VCCA or VCCB is at GND, enabling safe use in systems with independent rail sequencing or hot-swap capability |
| Overvoltage-tolerant I/O | Withstands up to 4.6 V on any I/O pin regardless of supply state - eliminates need for external clamping diodes in mixed-voltage environments |
| VCCB-referenced controls | DIR and OE thresholds track VCCB, ensuring reliable logic interpretation even when VCCA and VCCB differ significantly (e.g., 1.5 V ↔ 3.3 V) |
Applications
| Processor-to-FPGA Interface | Memory Subsystem Translation |
|---|---|
Use Scenario: Connecting an ARM Cortex-A9 processor (1.8 V I/O) to a Xilinx Artix-7 FPGA (2.5 V bank) via parallel address/data bus. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing real-time read/write cycles with sub-8 ns propagation delay and 3-state isolation during bus arbitration. Use Value: Eliminates discrete level-shifter arrays, reduces PCB area by >40%, and maintains setup/hold timing margins across voltage domains. | Use Scenario: Interfacing a 3.3 V microcontroller to LPDDR2 SDRAM operating at 1.2 V I/O with shared command/address bus. IC Role / Device Role / Timing Role: Dual-rail transceiver translating control signals (CS#, RAS#, CAS#) and bidirectional DQ lines while supporting burst-mode timing. Use Value: Enables direct memory access without voltage-domain bottlenecks; Ioff prevents leakage during controller sleep states. |
| Industrial PLC Backplane | Automotive ADAS Sensor Hub |
Use Scenario: Isolating and translating 24 V field I/O module data (via 3.3 V interface) to a 1.8 V SoC-based controller over a 16-bit parallel bus. IC Role / Device Role / Timing Role: Robust bus transceiver providing ESD-hardened, noise-immune communication with programmable 3-state control per segment. Use Value: Survives harsh industrial environments (IEC 61000-4-2 Level 4) and simplifies backplane design by removing separate isolators and translators. | Use Scenario: Aggregating camera, radar, and ultrasonic sensor data (1.5 V/1.8 V) into a 3.3 V domain for processing in a TI Jacinto 7 SoC. IC Role / Device Role / Timing Role: Low-skew, low-noise transceiver enabling time-critical sensor fusion with deterministic latency under 7 ns. Use Value: DOC™ circuitry suppresses crosstalk in dense sensor harnesses; MSL-3 packaging supports automotive reflow profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC16T245ZR | 48-pin TSSOP (DGG), same electrical specs but different package; lacks NC pins; higher θJA (70°C/W vs 28°C/W) | Suitable for prototyping or lower-density boards where thermal dissipation is less critical | Select when manual assembly, test fixtures, or legacy footprint compatibility are priorities over thermal performance |
| SN74LVC16T245DGGR | Fixed 3.3 V/3.3 V operation only; no dual-rail translation; ±24 mA drive; no DOC™ or Ioff | Limited to same-voltage-domain applications; not suitable for mixed-voltage translation | Choose only if all connected devices share identical VCC and no partial-power-down isolation is required |
Compared with SN74AVCB164245, the SN74AVC16T245ZR offers identical functionality in a larger, thermally less efficient package, while the SN74LVC16T245DGGR sacrifices voltage flexibility and advanced power management for cost-sensitive single-rail designs.
Availability
SN74AVCB164245 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive ADAS sensor hubs, processor-to-FPGA interfaces, and memory subsystem translation requiring stable component supply and long-term lifecycle assurance.
Supply support for SN74AVCB164245 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 experience in high-reliability interface solutions.
The SN74AVCB164245 belongs to TI's Widebus™ family of advanced bus interface ICs, engineered specifically for low-voltage, mixed-domain system interconnect in space-constrained, thermally demanding applications.
FAQ
What voltage ranges does the SN74AVCB164245 support on its A and B ports?
The SN74AVCB164245 supports independent supply voltages from 1.4 V to 3.6 V on both VCCA (A port) and VCCB (B port). This allows translation between common logic families including 1.5 V, 1.8 V, 2.5 V, and 3.3 V domains. The device maintains full functionality across this range without speed degradation or additional biasing components, and its overvoltage-tolerant I/O pins withstand up to 4.6 V regardless of supply state.
How does the Ioff feature protect the SN74AVCB164245 during partial power-down?
The Ioff feature in the SN74AVCB164245 disables all outputs when either VCCA or VCCB is at GND, limiting Ioff current to ±10 µA maximum. This prevents damaging current backflow through the device during power sequencing, hot-swap events, or standby modes. For example, if the A-side processor powers down first while the B-side FPGA remains active, the SN74AVCB164245 enters high-impedance isolation automatically - eliminating the need for external isolation circuitry.
What is the purpose of DOC™ circuitry in the SN74AVCB164245?
DOC™ (Dynamic Output Control) circuitry in the SN74AVCB164245 dynamically adjusts output impedance during signal transitions: lowering it initially to deliver strong edge drive (equivalent to ±24 mA), then raising it to suppress ringing and reduce simultaneous switching noise. This improves signal integrity on high-speed parallel buses without requiring external series resistors or termination networks, directly enhancing timing margin and electromagnetic compatibility in dense PCB layouts.
Can the SN74AVCB164245 be used with mismatched supply voltages like 1.5 V and 3.3 V?
Yes, the SN74AVCB164245 is explicitly designed for mismatched supply operation - for example, VCCA = 1.5 V and VCCB = 3.3 V. Its control inputs (DIR, OE) are referenced to VCCB, and its I/O structures are overvoltage-tolerant up to 4.6 V. Data transmission remains fully functional in both directions, with propagation delays specified across all voltage combinations (e.g., tpd = 1.7–7.6 ns depending on rail pairings), making it ideal for heterogeneous system integration.
What package type and mounting details apply to the SN74AVCB164245KR orderable part?
The SN74AVCB164245KR uses a VFBGA-56 (ZQL) package: 7.0 mm × 4.5 mm × 1.0 mm body, 0.5 mm ball pitch, Pb-free, MSL-3 rated (floor life 168 hours at ≤30°C/60% RH). It ships in tape-and-reel format (2000 units/reel) with Q1 pin quadrant orientation. Board layout requires strict adherence to TI's recommended land pattern (DGG0048A derivative), including solder mask defined pads and controlled stencil aperture design for reliable 0.5 mm pitch assembly.
SN74AVCB164245KR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCB
- 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
SN74AVCB164245KR FAQ
1.How can I place an order for SN74AVCB164245KR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVCB164245KR 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 SN74AVCB164245KR reliable?
The price and inventory of SN74AVCB164245KR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVCB164245KR is usually 5 days.
3.What payment methods are accepted for SN74AVCB164245KR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AVCB164245KR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AVCB164245KR?
SN74AVCB164245KR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVCB164245KR 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 SN74AVCB164245KR?
For technical support, including SN74AVCB164245KR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVCB164245KR requirements.
6.How does Aetrix verify that SN74AVCB164245KR is sourced from the original manufacturer or authorized distributors?
All SN74AVCB164245KR 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 SN74AVCB164245KR meets industry standards.
7.What is the process for return or replacement of SN74AVCB164245KR?
All SN74AVCB164245KR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVCB164245KR, 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 SN74AVCB164245KR part is unused and in its original packaging.
Return procedure for SN74AVCB164245KR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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