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Texas Instruments SN74LVCH16245AZQLR
- Part No.:
- SN74LVCH16245AZQLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-VFBGA
- Datasheet:
-
SN74LVCH16245AZQLR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,057
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Product details
Overview
SN74LVCH16245AZQLR 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 signal operation (5.5-V-tolerant inputs at 3.3-V VCC), delivers 4-ns max propagation delay at 3.3 V, and integrates bus-hold circuitry to eliminate external pull resistors - used in tablet memory interfaces and industrial backplane data routing.
For engineers reviewing the SN74LVCH16245AZQLR datasheet, SN74LVCH16245AZQLR pinout, SN74LVCH16245AZQLR application, or SN74LVCH16245AZQLR equivalent, key selection criteria include Ioff-enabled live insertion support, 5.5-V input tolerance for level translation, bus-hold functionality, and TSSOP-48 package compatibility with high-density PCB layouts.
Technical Context
The SN74LVCH16245AZQLR implements two independent 8-bit transceiver sections, each controlled by dedicated DIR and OE pins (1DIR/1OE and 2DIR/2OE), enabling simultaneous or isolated A↔B data flow. Its CMOS design features active bus-hold on all A- and B-port I/Os, eliminating floating-input risk without external biasing.
It supports partial-power-down via Ioff, blocking current flow when VCC = 0 V, and tolerates 5.5-V inputs across full VCC range (1.65–3.6 V), making it suitable for voltage-level bridging between legacy 5-V logic and modern low-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables direct integration into 1.8-V, 2.5-V, and 3.3-V system rails without level shifters. |
| Input Voltage Tolerance | Up to 5.5 V - Allows safe interfacing with 5-V peripherals while powered from 3.3-V supply. |
| Max Propagation Delay | 4 ns at 3.3 V - Supports >100-MHz data throughput in synchronous bus applications. |
| Ioff Current | ±10 µA at VCC = 0 V - Prevents back-drive damage during hot-swap or partial power-down sequences. |
| Bus-Hold Current | ±45 µA at 3 V - Maintains valid logic state on undriven A/B-port inputs without external resistors. |
| Output Drive Strength | ±24 mA at 3 V - Drives standard 50-Ω transmission lines or multiple LVC loads without buffering. |
| ESD Rating | 2000-V HBM - Meets industrial-grade robustness requirements per JESD22-A114. |
Pinout & Package
TSSOP-48 package (body size 12.50 mm × 6.10 mm), lead-free, RoHS-compliant, moisture sensitivity level 1 (260°C peak reflow).
| 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 A/B ports in high-impedance isolation. |
| 1A1–1A8, 2A1–2A8 | A-port I/O | First and second 8-bit data interface - accepts and drives signals with bus-hold active regardless of OE state. |
| 1B1–1B8, 2B1–2B8 | B-port I/O | Complementary 8-bit data interface - bidirectionally coupled to A-port via DIR-controlled path. |
| VCC (Pins 7, 18, 31, 42) | Power supply | Four distributed VCC pins reduce switching noise and improve PSRR across high-speed operation. |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths for all I/Os and minimize ground bounce (VOLP < 0.8 V). |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5.5-V-tolerant inputs at 1.65–3.6-V VCC enable seamless interfacing between 3.3-V microcontrollers and 5-V legacy peripherals. |
| Integrated bus-hold circuitry | Eliminates need for external pullup/pulldown resistors on all 16 I/Os, reducing BOM count and board space in point-of-sale terminals. |
| Ioff partial-power-down support | Prevents current backflow when VCC = 0 V, allowing safe live insertion into powered backplanes or modular computing systems. |
| Low ground bounce (VOLP) | Typical 0.8 V at VCC = 3.3 V ensures signal integrity in noise-sensitive medical wearables and test equipment. |
| High-speed switching | 4-ns max tpd at 3.3 V enables reliable operation in DDR memory buffers and FPGA I/O expansion interfaces. |
Applications
| Industrial Backplane Interface | Tablet Memory Expansion |
|---|---|
Use Scenario: Isolating and translating data between a 3.3-V ARM SoC and legacy 5-V peripheral modules on a modular industrial controller backplane. IC Role / Device Role / Timing Role: Bidirectional level-translating bus transceiver managing A/B port arbitration under real-time OS control. Use Value: Eliminates discrete level shifters and reduces layout complexity while maintaining 4-ns timing margin for 100-MHz burst transfers. |
Use Scenario: Expanding LPDDR2 memory bandwidth between application processor and secondary memory bank in ultra-thin tablets. IC Role / Device Role / Timing Role: Dual-octal transceiver providing isolated 16-bit data path with independent DIR/OE control per octet. Use Value: Enables concurrent read/write operations across memory banks using bus-hold to retain state during arbitration delays. |
| Wearable Health Sensor Hub | Electronic Point-of-Sale Terminal |
Use Scenario: Aggregating sensor data from multiple 5-V analog front-ends into a 1.8-V MCU in compact wearable health monitors. IC Role / Device Role / Timing Role: Low-voltage tolerant transceiver performing down-translation and bus isolation during sleep/wake transitions. Use Value: Ioff protection prevents battery drain during MCU deep-sleep mode while preserving signal integrity via sub-1-V ground bounce. |
Use Scenario: Interfacing barcode scanner, receipt printer, and cash drawer controllers to a central 3.3-V payment processing unit in retail POS terminals. IC Role / Device Role / Timing Role: Robust 16-bit data bridge supporting hot-plug peripherals with ESD-hardened I/Os and bus-hold stability. Use Value: 2000-V HBM rating and no-floating-input requirement simplify field-replaceable module design and reduce warranty returns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | Lacks bus-hold circuitry; requires external pull resistors on unused I/Os. | Suitable only where all I/Os are actively driven; not recommended for modular or hot-swap designs. | Select SN74LVCH16245AZQLR when bus-hold is required to reduce component count and improve reliability in undriven scenarios. |
| SN74AVC16245DGGR | Supports 1.2-V to 3.6-V VCC; higher speed (2.8-ns tpd) but lower drive (±12 mA) and no 5.5-V input tolerance. | Better for ultra-low-voltage SoC interconnects; incompatible with 5-V peripheral interfacing. | Choose SN74LVCH16245AZQLR for mixed-voltage systems requiring 5-V tolerance and ±24-mA drive at 3.3 V. |
Compared with SN74LVC16245ADGGR and SN74AVC16245DGGR, the SN74LVCH16245AZQLR uniquely combines 5.5-V input tolerance, integrated bus-hold, and Ioff - making it the only option among the three qualified for live-insertion 5-V/3.3-V bridging in industrial and retail embedded systems.
Availability
SN74LVCH16245AZQLR is available at Aetrix Electronics and suitable for industrial backplane interfaces, tablet memory expansion, wearable health sensor hubs, and electronic point-of-sale terminals requiring stable component supply across extended temperature ranges (–40°C to 125°C).
Supply support for SN74LVCH16245AZQLR 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 company specializing in analog and embedded processing solutions, with leadership in interface, logic, and power management ICs.
The SN74LVCH16245AZQLR belongs to TI's Widebus™ family of advanced logic devices, engineered specifically for high-speed, low-voltage bidirectional data transfer in mixed-signal and multi-rail embedded systems.
FAQ
What is the maximum operating temperature for the SN74LVCH16245AZQLR?
The SN74LVCH16245AZQLR is rated for continuous operation from –40°C to +125°C ambient temperature, meeting industrial-grade thermal requirements. This specification is validated per JEDEC JESD78 and confirmed in the device's Recommended Operating Conditions table (Section 7.3 of SCES495C). The TSSOP-48 package's thermal metrics - including RθJA = 67.1°C/W - ensure reliable performance within this range under typical PCB copper pour conditions.
Does the SN74LVCH16245AZQLR support live insertion in powered systems?
Yes, the SN74LVCH16245AZQLR supports live insertion via its Ioff feature, which disables output drivers and blocks current backflow when VCC = 0 V. This capability is explicitly characterized in Section 7.5 (Electrical Characteristics) with Ioff ≤ ±10 µA at VI or VO = 5.5 V and VCC = 0 V. It enables safe hot-plug operation in modular backplanes and field-upgradeable POS terminals without risking damage to upstream logic.
Can the SN74LVCH16245AZQLR interface a 5-V sensor with a 1.8-V microcontroller?
Yes, the SN74LVCH16245AZQLR accepts inputs up to 5.5 V across its full 1.65–3.6-V VCC range, enabling direct connection of 5-V sensors to a 1.8-V-powered MCU. Input thresholds scale with VCC (e.g., VIH = 0.65×VCC at 1.65 V), and bus-hold maintains valid logic states during signal transitions. This behavior is documented in Sections 7.3 and 9.1 of the SCES495C datasheet.
How does bus-hold functionality work on the SN74LVCH16245AZQLR?
Bus-hold circuitry on the SN74LVCH16245AZQLR actively maintains the last-valid logic state on all A- and B-port I/Os when inputs are undriven or floating, drawing ±45 µA at 3 V (Section 7.5). It operates independently of OE and DIR states and eliminates external pull resistors - critical for reducing BOM cost and improving reliability in handheld and modular electronics where connector disconnection may occur.
What is the propagation delay of the SN74LVCH16245AZQLR at 2.5 V?
At VCC = 2.5 V, the SN74LVCH16245AZQLR exhibits a maximum propagation delay (tpd) of 4.5 ns, as specified in Section 7.6 (Switching Characteristics) of SCES495C. This value applies to both A→B and B→A data paths under load conditions of CL = 30 pF and ΔV = ±0.2 V. Typical tpd is 1 ns, supporting high-throughput data transfer in real-time industrial communication links.
SN74LVCH16245AZQLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCH
- 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:
- 24mA, 24mA
- 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)
SN74LVCH16245AZQLR FAQ
1.How can I place an order for SN74LVCH16245AZQLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCH16245AZQLR 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 SN74LVCH16245AZQLR reliable?
The price and inventory of SN74LVCH16245AZQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCH16245AZQLR is usually 5 days.
3.What payment methods are accepted for SN74LVCH16245AZQLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCH16245AZQLR transactions.
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4.How is shipping managed for SN74LVCH16245AZQLR?
SN74LVCH16245AZQLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCH16245AZQLR 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 SN74LVCH16245AZQLR?
For technical support, including SN74LVCH16245AZQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH16245AZQLR requirements.
6.How does Aetrix verify that SN74LVCH16245AZQLR is sourced from the original manufacturer or authorized distributors?
All SN74LVCH16245AZQLR 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 SN74LVCH16245AZQLR meets industry standards.
7.What is the process for return or replacement of SN74LVCH16245AZQLR?
All SN74LVCH16245AZQLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH16245AZQLR, 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 SN74LVCH16245AZQLR part is unused and in its original packaging.
Return procedure for SN74LVCH16245AZQLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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