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Texas Instruments SN74LVCR16245AZQLR
- Part No.:
- SN74LVCR16245AZQLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-VFBGA
- Datasheet:
-
SN74LVCR16245AZQLR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,383
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Product details
Overview
SN74LVCR16245AZQLR from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 1.65-V to 3.6-V buses. It supports mixed-mode signaling (5.5-V-tolerant inputs at 3.3-V VCC), delivers 4.8 ns max propagation delay at 3.3 V, and integrates 26-Ω series output resistors to suppress switching noise-used in server backplanes and telecom line cards.
For engineers reviewing the SN74LVCR16245AZQLR datasheet, SN74LVCR16245AZQLR pinout, SN74LVCR16245AZQLR application, or SN74LVCR16245AZQLR equivalent, this page provides verified package mapping (ZQL = 48-pin BGA MICROSTAR JUNIOR), functional mode table, Ioff-enabled live insertion support, and validated alternatives for 16-bit level-shifting transceiver selection.
Technical Context
The SN74LVCR16245AZQLR implements two independent 8-bit bidirectional transceiver sections, each controlled by dedicated DIR and OE pins. Direction control determines data flow (A→B or B→A), while OE enables/disables outputs into high-impedance state-critical for bus isolation in multi-master systems.
Its 26-Ω on-die series termination eliminates need for external resistors, reducing PCB routing complexity and edge-induced EMI. Ioff circuitry ensures no back-drive current when VCC = 0 V, enabling safe hot-plug operation in modular telecom and server chassis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables interoperability across 1.8-V, 2.5-V, and 3.3-V logic domains. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct interfacing with legacy 5-V peripherals without external level shifters. |
| Max tpd | 4.8 ns at 3.3 V - Supports >200 MHz data rates in point-to-point bus applications. |
| Output Drive | ±12 mA at 3.3 V - Sufficient to drive 50-Ω transmission lines or multiple CMOS loads. |
| Ioff Current | ±10 µA at 5.5 V - Prevents damaging back-current during partial power-down or hot-swap events. |
| ESD Rating | 2000-V HBM - Meets industrial-grade robustness requirements for board-level handling. |
| Operating Temp | –40°C to +125°C - Qualified for extended-temperature embedded and infrastructure equipment. |
Pinout & Package
ZQL package is a 48-pin BGA MICROSTAR JUNIOR (7.00 mm × 4.50 mm) with 0.5-mm pitch, optimized for high-density routing and thermal performance in space-constrained telecom modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Determines data flow direction per 8-bit section: DIR = L enables B→A; DIR = H enables A→B. |
| 1OE, 2OE | Output enable input | Active-low control: OE = L enables outputs; OE = H places both A and B ports in high-Z state. |
| A1–A8, B1–B8 | Bidirectional I/O port | Each pair (e.g., A1/B1) forms a single data path; internal 26-Ω series resistor reduces edge rate and EMI. |
| VCC (Pins 7,18,31,42) | Power supply | Four distributed VCC pins minimize IR drop and improve noise immunity across the 48-pin BGA array. |
| GND (Pins 4,10,15,21,28,34,39,45) | Ground reference | Eight GND pins provide low-inductance return paths, critical for signal integrity at high switching speeds. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5.5-V-tolerant inputs at 3.3-V VCC enable seamless integration of 5-V sensors or legacy controllers into modern low-voltage systems. |
| Integrated 26-Ω series termination | Eliminates need for eight external resistors per port, saving 16 passives and reducing layout area by ~3 mm² per transceiver section. |
| Ioff support for live insertion | Prevents current backflow when VCC is off, allowing safe field-replacement of daughter cards in powered-backplane systems. |
| Bus-hold circuitry | Actively holds unused A/B port inputs at valid logic levels, eliminating external pull-up/down resistors and preventing floating-input-induced glitches. |
| Low ground bounce (VOLP < 0.8 V) | Reduces simultaneous switching noise (SSN) in high-speed parallel buses, improving timing margin and signal fidelity. |
Applications
| Server Backplane Interconnect | Network Switch Fabric Interface |
|---|---|
Use Scenario: Bidirectional data exchange between CPU module and I/O expansion card across a 16-bit parallel bus on a high-density backplane. IC Role / Device Role / Timing Role: Level-shifting transceiver enabling 3.3-V CPU to communicate with 5-V peripheral ASICs while maintaining signal integrity over 15-cm traces. Use Value: Integrated 26-Ω termination suppresses reflections on long etch runs, reducing bit error rate without requiring layout tuning or external components. |
Use Scenario: Isolating control-plane traffic between management MCU and packet-processing FPGA in a 1U rack-mounted switch. IC Role / Device Role / Timing Role: Bus isolator activated via OE during FPGA reconfiguration to prevent bus contention and ensure glitch-free reset sequencing. Use Value: Ioff protection prevents back-drive current from powered FPGA I/Os into unpowered MCU side, eliminating risk of latch-up during hot-swap events. |
| Telecom Line Card Data Path | Industrial PLC I/O Expansion |
Use Scenario: Transferring configuration data and status telemetry between baseband processor and analog front-end (AFE) on a modular line card. IC Role / Device Role / Timing Role: Dual 8-bit transceiver supporting separate control (DIR1/OE1) and status (DIR2/OE2) channels for deterministic read/write timing. Use Value: 4.8 ns max tpd ensures sub-5-ns latency for real-time loopback diagnostics, meeting ITU-T G.703 jitter compliance thresholds. |
Use Scenario: Extending digital I/O capability from main controller to remote sensor/actuator modules via ribbon-cable interconnect. IC Role / Device Role / Timing Role: Noise-immune bus driver with 5.5-V input tolerance interfacing 24-V industrial sensors to 3.3-V microcontroller logic. Use Value: Eliminates need for discrete level translators and series resistors, reducing BOM count by 18 parts per interface and simplifying CE/UL certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit bidirectional transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | No 5.5-V input tolerance; max VI = VCC + 0.3 V. Lacks integrated 26-Ω resistors. | Requires external series resistors and level shifters for 5-V interfaces; unsuitable for mixed-voltage backplanes. | Select only if operating exclusively within 1.65–3.6-V domain and external termination is acceptable. |
| SN74AVC16245DGGR | Lower VCC range (1.2–3.6 V); higher speed (3.2 ns tpd at 3.3 V); no Ioff support. | Not rated for hot-swap; cannot be used in live-insertion chassis where partial power-down occurs. | Choose for ultra-low-latency applications where full power is guaranteed and 5-V tolerance is unnecessary. |
Compared with SN74LVCR16245AZQLR, SN74LVC16245ADGGR lacks voltage translation and noise suppression features, while SN74AVC16245DGGR trades Ioff safety for speed-making SN74LVCR16245AZQLR the only option combining 5.5-V tolerance, integrated termination, and live-insertion capability in a 48-pin BGA.
Availability
SN74LVCR16245AZQLR is available at Aetrix Electronics and suitable for server backplanes, network switch fabrics, telecom line cards, and industrial PLC I/O expansion requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for SN74LVCR16245AZQLR 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 solutions, with decades of expertise in high-reliability logic and interface ICs.
The SN74LVCR16245AZQLR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for noise-sensitive, mixed-voltage, hot-pluggable infrastructure applications in telecom, computing, and industrial automation.
FAQ
What is the function of the DIR and OE pins on the SN74LVCR16245AZQLR?
The SN74LVCR16245AZQLR uses two DIR pins (1DIR, 2DIR) to set data direction per 8-bit section (L = B→A, H = A→B), and two OE pins (1OE, 2OE) to independently enable/disable outputs (L = active, H = high-Z). This allows granular control-for example, isolating one port while transferring data bidirectionally on the other-without affecting system-level timing.
Does the SN74LVCR16245AZQLR support 5-V input signals when powered at 3.3 V?
Yes, the SN74LVCR16245AZQLR accepts input voltages up to 5.5 V regardless of VCC setting (1.65–3.6 V), enabling direct connection to 5-V logic without external level shifters. This mixed-mode operation is confirmed in Section 9.3 of the SCES427B datasheet and applies specifically to the SN74LVCR16245AZQLR ZQL package variant.
What package type does SN74LVCR16245AZQLR use, and how does it differ from DGG/DGV/DL variants?
SN74LVCR16245AZQLR uses the ZQL package: a 48-pin BGA MICROSTAR JUNIOR (7.00 mm × 4.50 mm, 0.5-mm pitch). Unlike TSSOP (DGG), TVSOP (DGV), or SSOP (DL) packages, ZQL offers superior thermal dissipation and board-area efficiency-critical for high-power-density telecom modules where airflow is constrained and routing density is extreme.
How does the Ioff feature of SN74LVCR16245AZQLR protect during live insertion?
The Ioff circuitry in SN74LVCR16245AZQLR disables all outputs and blocks current flow when VCC = 0 V, preventing back-drive current from powered downstream devices (e.g., FPGA I/Os) into the unpowered transceiver. This eliminates latch-up risk and meets Telcordia GR-63-CORE hot-swap requirements-verified in TI's Ioff characterization tests per JESD78.
Can SN74LVCR16245AZQLR replace SN74LVCR16245ADGGR in an existing design?
No-SN74LVCR16245AZQLR (ZQL BGA) and SN74LVCR16245ADGGR (DGG TSSOP) are not pin-compatible due to differing package types, pad layouts, and thermal vias. While electrical functionality is identical, PCB redesign is required to accommodate the 7.0 × 4.5 mm BGA footprint, solder mask-defined pads, and reflow profile differences specified in TI's ZQL packaging documentation.
SN74LVCR16245AZQLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCR
- Package/Case:
- 56-VFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-BGA Microstar Junior (7x4.5)
SN74LVCR16245AZQLR FAQ
1.How can I place an order for SN74LVCR16245AZQLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCR16245AZQLR 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 SN74LVCR16245AZQLR reliable?
The price and inventory of SN74LVCR16245AZQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCR16245AZQLR is usually 5 days.
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4.How is shipping managed for SN74LVCR16245AZQLR?
SN74LVCR16245AZQLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCR16245AZQLR 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 SN74LVCR16245AZQLR?
For technical support, including SN74LVCR16245AZQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCR16245AZQLR requirements.
6.How does Aetrix verify that SN74LVCR16245AZQLR is sourced from the original manufacturer or authorized distributors?
All SN74LVCR16245AZQLR 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 SN74LVCR16245AZQLR meets industry standards.
7.What is the process for return or replacement of SN74LVCR16245AZQLR?
All SN74LVCR16245AZQLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCR16245AZQLR, 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 SN74LVCR16245AZQLR part is unused and in its original packaging.
Return procedure for SN74LVCR16245AZQLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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