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Texas Instruments SN74LVCR162245DLR
- Part No.:
- SN74LVCR162245DLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVCR162245DLR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:800
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Product details
Overview
SN74LVCR162245DLR from Texas Instruments is a dual-octal noninverting 16-bit bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between buses operating at 2.7 V to 3.6 V. It supports 5.5 V-tolerant inputs, delivers ≤8.5 ns propagation delay at 3.3 V, and integrates 26-Ω series output resistors and bus-hold circuitry-enabling robust signal integrity in industrial backplane and memory interface applications.
For engineers reviewing the SN74LVCR162245DLR datasheet, SN74LVCR162245DLR pinout, SN74LVCR162245DLR application, or SN74LVCR162245DLR equivalent, key selection criteria include its 48-pin SSOP (DL) package, dual-direction control via DIR/OE pins, 12 mA output drive capability, and compatibility with mixed-voltage 3.3 V/5 V system interconnects.
Technical Context
The SN74LVCR162245DLR implements two independent 8-bit transceiver sections, each with separate direction (DIR) and output-enable (OE) controls. Its logic diagram confirms noninverting data paths and true 3-state output behavior, where OE = high forces all outputs into high-impedance regardless of DIR state.
Bus-hold circuitry is embedded on all A and B port inputs-active independently of OE/DIR-and eliminates external pullup/pulldown resistors. All outputs feature integrated 26-Ω series termination to suppress overshoot/undershoot without requiring PCB-level resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - ensures compatibility with 3.3 V logic systems and tolerance to supply variation. |
| Input Voltage Tolerance | Up to 5.5 V - enables safe interfacing with 5 V peripherals without level shifters. |
| Max Propagation Delay | 8.5 ns at VCC = 3.3 V - supports high-speed data transfer up to ~117 MHz clock-equivalent rates. |
| Output Drive Strength | ±12 mA - sufficient to drive standard 50 Ω transmission lines or multiple CMOS loads. |
| Bus-Hold Current | ±75 µA at VI = 2 V - actively maintains valid logic levels on floating inputs without external components. |
| Output Series Resistance | 26 Ω - reduces ringing and EMI by damping edge rates; no external termination required. |
| IOZ Leakage (3-State) | ±10 µA at VCC = 3.6 V - ensures minimal power draw and signal leakage during isolation mode. |
Pinout & Package
SN74LVCR162245DLR uses a 48-pin SSOP (Shrink Small-Outline Package) with 0.5 mm pitch, 12.4–12.6 mm body width, and 6.0–6.2 mm body length. The package is RoHS-compliant, moisture-sensitivity Level-1 rated, and optimized for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Low = B→A data flow; High = A→B data flow; determines signal path direction independently per section. |
| 1OE, 2OE | Output enable input (per 8-bit section) | Low = outputs active; High = all outputs enter high-impedance state, isolating both buses. |
| 1A1–1A8, 2A1–2A8 | Port A data I/O (input/output) | 8-bit bidirectional data channel A; accepts 5.5 V-tolerant inputs and drives 3.3 V outputs. |
| 1B1–1B8, 2B1–2B8 | Port B data I/O (input/output) | 8-bit bidirectional data channel B; identical electrical characteristics to Port A. |
| VCC | Power supply | Single 2.7–3.6 V supply powers internal logic and I/O buffers; multiple VCC pins reduce supply noise. |
| GND | Ground reference | Multiple GND pins provide low-inductance return paths for switching currents and improve noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω output series resistors | Eliminates need for discrete termination resistors, reducing BOM count and PCB area while controlling edge-induced EMI. |
| Active bus-hold on all data inputs | Maintains stable logic states on unused or unterminated inputs, preventing metastability and eliminating external biasing components. |
| 5.5 V-tolerant inputs | Enables direct connection to legacy 5 V logic without voltage translation, simplifying mixed-voltage system design. |
| Low ground bounce (VOLP < 0.8 V) | Minimizes noise coupling into shared ground planes during simultaneous switching, improving signal integrity in dense layouts. |
| Latch-up immunity > 250 mA | Meets JEDEC JESD-17 requirements, ensuring robust operation under transient overvoltage or ESD stress conditions. |
Applications
| Memory Subsystem Interfacing | Industrial Backplane Data Routing |
|---|---|
Use Scenario: Connecting FPGA or ASIC memory controllers to DDR SDRAM or SRAM modules with mismatched voltage domains. IC Role / Device Role / Timing Role: Bidirectional level-tolerant data buffer enabling 3.3 V controller-to-5 V memory communication with precise timing control via DIR/OE. Use Value: Eliminates discrete level shifters and pull resistors while maintaining sub-9 ns propagation delay for tight memory timing budgets. | Use Scenario: Isolating and routing parallel data across modular PLC or CNC controller backplanes with hot-swap capability. IC Role / Device Role / Timing Role: 16-bit transceiver providing controlled bus isolation during module insertion/removal using OE-driven 3-state transitions. Use Value: Prevents bus contention during live insertion and reduces ground bounce-induced errors in multi-slot industrial chassis. |
| Embedded Processor Local Bus Expansion | Test Equipment Digital I/O Interface |
Use Scenario: Extending the local parallel bus of an ARM Cortex-M7 microcontroller to off-chip peripherals such as ADCs, DACs, or display drivers. IC Role / Device Role / Timing Role: Dual-octal transceiver supporting independent read/write direction control per 8-bit segment for flexible peripheral addressing. Use Value: Enables synchronous burst transfers with deterministic 8.5 ns latency and built-in bus-hold for glitch-free idle-state behavior. | Use Scenario: Implementing programmable digital stimulus/response channels in automated test equipment (ATE) with configurable voltage thresholds. IC Role / Device Role / Timing Role: High-drive 16-bit I/O buffer supporting 12 mA sink/source per line and 5.5 V input tolerance for legacy DUT interfacing. Use Value: Reduces external component count per channel and improves test repeatability through consistent output impedance and low undershoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADLR | No bus-hold; no 5.5 V-tolerant inputs; max tpd = 6.1 ns at 3.3 V. | Requires external pull resistors; limited to 3.3 V-only systems; faster but less robust in noisy environments. | Choose when maximum speed is critical and bus-hold/5 V tolerance are unnecessary. |
| SN74AVC162245DGGR | Wider VCC range (1.2 V to 3.6 V); lower drive (8 mA); no integrated 26-Ω resistors. | Suitable for ultra-low-voltage SoC interfaces; requires external termination; lacks bus-hold for floating inputs. | Prefer for battery-powered or multi-rail voltage-scalable designs where 3.3 V robustness is secondary. |
Compared with SN74LVC16245ADLR and SN74AVC162245DGGR, the SN74LVCR162245DLR uniquely combines 5.5 V input tolerance, active bus-hold, and integrated 26-Ω termination-making it optimal for industrial and mixed-voltage backplane applications where reliability and BOM simplification outweigh marginal speed gains.
Availability
SN74LVCR162245DLR is available at Aetrix Electronics and suitable for industrial backplane routing, memory subsystem interfacing, and embedded processor bus expansion requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74LVCR162245DLR 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 decades of expertise in high-reliability interface ICs.
The SN74LVCR162245DLR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for noise-immune, mixed-voltage data routing in industrial automation, test equipment, and communications infrastructure.
FAQ
What is the recommended power-up sequence for SN74LVCR162245DLR to ensure high-impedance outputs?
To guarantee high-impedance outputs during power-up, tie OE (pins 1 and 24) to VCC through a pullup resistor. TI specifies the minimum resistance based on the driver's current-sinking capability-typically ≤10 kΩ suffices for most 3.3 V systems. This prevents bus contention before system initialization completes. The SN74LVCR162245DLR does not require special sequencing for DIR or data pins, but OE must be asserted high before VCC stabilizes. Always verify against latest TI application notes SCBA004 and SCES047E.
Does SN74LVCR162245DLR support hot-swap operation, and what design precautions apply?
Yes, SN74LVCR162245DLR supports hot-swap operation due to its 5.5 V-tolerant inputs, high-impedance 3-state outputs, and latch-up immunity exceeding 250 mA per JEDEC JESD-17. To ensure robustness, connect OE to a controlled enable signal rather than tying directly to VCC, use series resistors on DIR/OE lines to limit inrush current, and implement staggered VCC ramping if possible. The SN74LVCR162245DLR's bus-hold circuitry further prevents floating-input faults during partial insertion. Refer to TI's hot-swap guidelines in SLVA612.
How does the bus-hold feature of SN74LVCR162245DLR interact with OE and DIR control signals?
The bus-hold circuitry in SN74LVCR162245DLR operates independently of OE and DIR-it remains fully active even when outputs are disabled (OE = high) or direction is undefined. Bus-hold maintains valid logic levels on all A and B port inputs (1A1–1A8, 1B1–1B8, etc.) using ±75 µA hold current, eliminating need for external biasing. TI explicitly warns against combining bus-hold with pullup/pulldown resistors, as this may cause excessive current draw. The SN74LVCR162245DLR's bus-hold is always enabled and cannot be disabled via any control pin.
Can SN74LVCR162245DLR be used as a single 16-bit transceiver instead of two independent 8-bit units?
Yes, SN74LVCR162245DLR can operate as a unified 16-bit transceiver by tying 1DIR and 2DIR together, and 1OE and 2OE together-effectively synchronizing both 8-bit sections. The device's functional table confirms identical behavior across sections, and its pinout allows straightforward external wiring. However, doing so forfeits independent control of direction and enable per byte lane, which may be needed for byte-selective operations in memory or protocol interfaces. The SN74LVCR162245DLR's dual-section architecture is intentionally flexible for either configuration.
What is the thermal performance of SN74LVCR162245DLR in its SSOP (DL) package, and how does it affect continuous operation?
The SN74LVCR162245DLR in SSOP (DL) package has a junction-to-ambient thermal resistance (θJA) of 63°C/W, measured per JESD 51-7 on a standard 4-layer board. At maximum recommended VCC = 3.6 V and full 16-bit switching, typical power dissipation is <150 mW-resulting in <10°C junction rise above ambient. This allows reliable continuous operation from –40°C to 85°C without heatsinking. TI specifies absolute max VCC = 4.6 V and storage temperature up to 150°C, but sustained operation above 85°C ambient requires derating per SCES047E Section 6.2. The SN74LVCR162245DLR's low static ICC (<20 µA) further minimizes self-heating.
SN74LVCR162245DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCR
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74LVCR162245DLR FAQ
1.How can I place an order for SN74LVCR162245DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCR162245DLR 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 SN74LVCR162245DLR reliable?
The price and inventory of SN74LVCR162245DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCR162245DLR is usually 5 days.
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SN74LVCR162245DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCR162245DLR 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 SN74LVCR162245DLR?
For technical support, including SN74LVCR162245DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCR162245DLR requirements.
6.How does Aetrix verify that SN74LVCR162245DLR is sourced from the original manufacturer or authorized distributors?
All SN74LVCR162245DLR 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 SN74LVCR162245DLR meets industry standards.
7.What is the process for return or replacement of SN74LVCR162245DLR?
All SN74LVCR162245DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCR162245DLR, 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 SN74LVCR162245DLR part is unused and in its original packaging.
Return procedure for SN74LVCR162245DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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