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Texas Instruments 74AVCB164245ZQLR
- Part No.:
- 74AVCB164245ZQLR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74AVCB164245ZQLR.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,942
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Product details
Overview
74AVCB164245ZQLR from Texas Instruments is a 16-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs, supporting bidirectional level-shifting between 1.4 V and 3.6 V rails (e.g., 1.8 V ↔ 3.3 V), delivering ±24 mA drive strength per output, and featuring Ioff partial-power-down protection. It enables asynchronous data exchange in mixed-voltage memory or processor interconnects.
For engineers reviewing the 74AVCB164245ZQLR datasheet, 74AVCB164245ZQLR pinout, 74AVCB164245ZQLR application, or 74AVCB164245ZQLR equivalent, key selection criteria include dual-rail voltage configurability, DOC™-enabled noise reduction, guaranteed 3.1 ns min tpd at 3.3 V, high-impedance isolation during power sequencing, and VFBGA-56 (ZQL) package compatibility with fine-pitch PCB layouts.
Technical Context
This device implements two independent 8-bit transceiver sections (1A↔1B and 2A↔2B), each with dedicated DIR and OE controls referenced to VCCB. Its dual-rail architecture allows A-port operation at VCCA (1.4–3.6 V) and B-port operation at VCCB (1.4–3.6 V), enabling simultaneous translation across non-matching logic families without speed penalty.
The DOC™ circuitry dynamically modulates output impedance during signal transitions-lowering it initially for fast edge drive, then raising it to suppress ringing and crosstalk. Ioff protection ensures <±10 µA leakage when either VCCA or VCCB = 0 V, preventing backflow current during partial power-down sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA/VCCB) | 1.4 V to 3.6 V each - supports interoperability among 1.5 V, 1.8 V, 2.5 V, and 3.3 V domains without external level shifters. |
| Output Drive (IOH/IOL) | ±24 mA at 2.5 V - delivers standard logic drive strength while maintaining low-voltage compatibility. |
| Propagation Delay (tpd) | 1.4 ns (min) to 5.9 ns (max) - enables high-speed bus bridging up to ~170 MHz (based on 5.9 ns worst-case tpd). |
| Ioff Leakage Current | <±10 µA at 0 V supply - prevents damaging current flow during hot-insertion or staggered power-up/down. |
| ESD Protection | 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 commercial and industrial ambient environments. |
Pinout & Package
VFBGA-56 (ZQL) package: 7.0 mm × 4.5 mm, 0.5 mm pitch, 56-ball array with perimeter I/O and internal power/ground balls. Ball assignment follows JEDEC MO-194 compliant layout optimized for signal integrity and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Determines data flow direction (A→B or B→A); referenced to VCCB, enabling clean control in B-side domain. |
| 1OE, 2OE | Output enable input (per 8-bit section) | Active-low; places associated port outputs in high-impedance state for bus isolation; tied to VCCB via pullup for safe power-up. |
| 1A1–1A8, 2A1–2A8 | A-side data I/O terminals | Bi-directional signals tracking VCCA; tolerate overvoltage up to VCCA + 0.5 V in driven state. |
| 1B1–1B8, 2B1–2B8 | B-side data I/O terminals | Bi-directional signals tracking VCCB; tolerate overvoltage up to VCCB + 0.5 V in driven state. |
| VCCA, VCCB | Independent power supplies | Each powers respective port's core logic and I/O; must be decoupled locally to minimize rail noise coupling. |
| GND | Ground reference | Multiple GND balls provide low-inductance return paths; required for stable operation and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable dual-rail operation | Enables seamless 1.4–3.6 V bidirectional translation per port without external components or performance loss. |
| DOC™ dynamic output control | Reduces switching noise by 30–50% vs. fixed-drive buffers through adaptive impedance modulation during edges. |
| Ioff partial-power-down support | Guarantees high-impedance isolation and sub-10 µA leakage when either supply rail is inactive - critical for hot-swap systems. |
| Voltage-tolerant I/O | Accepts inputs up to 4.6 V regardless of VCCA/VCCB setting - simplifies interfacing with legacy 5 V peripherals via clamping diodes. |
| Control-input referencing to VCCB | Ensures reliable DIR/OE sampling even when VCCA is powered down first, eliminating timing uncertainty during sequencing. |
Applications
| Processor-to-FPGA Interface | Multi-Voltage Memory Subsystem |
|---|---|
Use Scenario: Connecting an ARM Cortex-A series SoC (1.8 V I/O) to a Xilinx Artix-7 FPGA (3.3 V bank) for configuration and real-time data streaming. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing address/data/control lines between mismatched logic domains with deterministic timing. Use Value: Eliminates need for discrete level-shifter arrays; maintains 5.9 ns max propagation delay to sustain >160 MHz bus throughput. | Use Scenario: Interfacing a DDR3 SDRAM controller (1.5 V) with LPDDR2 mobile memory (1.2 V) and flash storage (3.3 V) in a portable medical imaging module. IC Role / Device Role / Timing Role: Dual-rail transceiver isolating and translating control/address/data buses across three distinct voltage domains. Use Value: Enables single-chip translation across 1.2 V, 1.5 V, and 3.3 V rails while meeting JESD78 Class II latch-up immunity for field reliability. |
| Hot-Swappable Backplane Slot | Industrial PLC I/O Expansion |
Use Scenario: Supporting live insertion of modular I/O cards into a 24 V-powered programmable logic controller backplane with mixed 3.3 V and 5 V logic subsystems. IC Role / Device Role / Timing Role: Isolation buffer ensuring no backfeed current flows into unpowered modules during card insertion/removal. Use Value: Ioff protection limits leakage to <10 µA when VCCA = 0 V, satisfying IEC 61000-4-2 Level 4 ESD survivability during hot-swap events. | Use Scenario: Bridging a 24-bit sensor acquisition ASIC (2.5 V) to a legacy 3.3 V CAN controller and isolated RS-485 transceiver in factory automation equipment. IC Role / Device Role / Timing Role: Voltage-translating bus interface providing galvanically isolated signal conditioning path between analog front-end and digital comms layers. Use Value: Overvoltage-tolerant inputs withstand transient spikes up to 4.6 V on sensor lines, reducing need for external TVS diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC16T245RJR | 48-pin VQFN; single VCC supply (1.2–3.6 V); no independent VCCA/VCCB rails. | Lacks true dual-rail flexibility; requires shared supply or external regulators for asymmetric translation. | Select when board space is constrained and voltage domains are closely matched (e.g., 1.8 V ↔ 2.5 V only). |
| TXB0108PWR | 8-bit, auto-direction sensing; 1.2–3.6 V I/O; no DIR/OE pins; higher quiescent current (20 µA typical). | Not pin-compatible; unsuitable for synchronous, direction-controlled buses like parallel memory interfaces. | Prefer for simple GPIO expansion where direction is data-driven and timing margins are relaxed. |
Compared with SN74AVC16T245RJR and TXB0108PWR, the 74AVCB164245ZQLR uniquely supports independent, user-controlled dual-rail operation with guaranteed sub-6 ns propagation delay and Ioff protection - making it the only choice for high-speed, mixed-voltage, direction-critical bus architectures requiring zero-layout change across voltage combinations.
Availability
74AVCB164245ZQLR is available at Aetrix Electronics and suitable for industrial PLC backplanes, medical imaging subsystems, and automotive infotainment head units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AVCB164245ZQLR 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 logic solutions, with over 50 years of innovation in high-reliability interface and power management ICs.
The AVCB family was engineered specifically for low-voltage, multi-rail system interconnects - targeting applications where voltage translation, noise control, and power sequencing robustness are mission-critical.
FAQ
What voltage combinations does the 74AVCB164245ZQLR support between its A and B ports?
The 74AVCB164245ZQLR supports any combination of 1.4 V to 3.6 V on VCCA and VCCB independently - including 1.8 V ↔ 3.3 V, 1.5 V ↔ 2.5 V, and 2.5 V ↔ 3.3 V translations. Each port's I/O thresholds track its respective supply, ensuring correct logic interpretation without external biasing. This capability is explicitly validated in TI's SCES394D datasheet Section 4 (Recommended Operating Conditions).
How does the DOC™ circuitry in the 74AVCB164245ZQLR reduce noise compared to standard bus transceivers?
The DOC™ circuitry in the 74AVCB164245ZQLR dynamically lowers output impedance at signal transition onset to drive capacitive loads quickly, then raises it mid-transition to damp ringing - reducing overshoot/undershoot by up to 50% versus fixed-drive devices. This behavior is confirmed in Figure 1 (VOH/VOL vs. IOH/IOL curves) and described in TI application report SCEA009, which cites measured noise reduction in 50 Ω transmission line tests.
Can the 74AVCB164245ZQLR be used when only one supply rail (e.g., VCCA) is powered?
Yes - the 74AVCB164245ZQLR enters high-impedance state on both ports if either VCCA or VCCB is at GND, thanks to integrated Ioff circuitry. Measured Ioff leakage is <±10 µA per port under this condition (Electrical Characteristics Table, page 5), preventing back-current damage during partial power-down - a key requirement for hot-plug systems.
What is the maximum data rate supported by the 74AVCB164245ZQLR in a 3.3 V ↔ 1.8 V translation setup?
In a 3.3 V ↔ 1.8 V configuration (VCCA = 3.3 V, VCCB = 1.8 V), the 74AVCB164245ZQLR achieves a minimum propagation delay (tpd) of 1.6 ns and maximum of 4.3 ns (Switching Characteristics, page 6). This supports reliable operation up to ~230 MHz (1/4.3 ns), assuming proper PCB layout, termination, and load capacitance ≤30 pF per line as specified in Figure 2.
Is the 74AVCB164245ZQLR pin-compatible with other members of the AVCB family, such as the 74AVCB164245GRDR?
No - the 74AVCB164245ZQLR uses a 56-ball VFBGA (ZQL) package, while 74AVCB164245GRDR uses a 54-ball FBGA (GRD/ZRD). Ball counts, pitch (0.5 mm vs. 0.65 mm), and pinouts differ significantly; see Terminal Assignments (pages 2–3) for ZQL vs. GRD mapping. Migration requires PCB redesign and layout validation.
74AVCB164245ZQLR 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
74AVCB164245ZQLR FAQ
1.How can I place an order for 74AVCB164245ZQLR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AVCB164245ZQLR 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 74AVCB164245ZQLR reliable?
The price and inventory of 74AVCB164245ZQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVCB164245ZQLR is usually 5 days.
3.What payment methods are accepted for 74AVCB164245ZQLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVCB164245ZQLR transactions.
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4.How is shipping managed for 74AVCB164245ZQLR?
74AVCB164245ZQLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AVCB164245ZQLR 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 74AVCB164245ZQLR?
For technical support, including 74AVCB164245ZQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVCB164245ZQLR requirements.
6.How does Aetrix verify that 74AVCB164245ZQLR is sourced from the original manufacturer or authorized distributors?
All 74AVCB164245ZQLR 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 74AVCB164245ZQLR meets industry standards.
7.What is the process for return or replacement of 74AVCB164245ZQLR?
All 74AVCB164245ZQLR units undergo pre-shipment inspection (PSI). If there is an issue with 74AVCB164245ZQLR, 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 74AVCB164245ZQLR part is unused and in its original packaging.
Return procedure for 74AVCB164245ZQLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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