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Texas Instruments SN74LVCR162245DGGR
- Part No.:
- SN74LVCR162245DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74LVCR162245DGGR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:982
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Product details
Overview
SN74LVCR162245 from Texas Instruments is a dual-octal noninverting 16-bit bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 2.7-V to 3.6-V buses. It supports 5.5-V-tolerant inputs, features integrated 26-Ω output series resistors, and includes active bus-hold circuitry on all data inputs. It is used in high-speed memory interfacing and FPGA-to-ASIC communication subsystems.
For engineers reviewing the SN74LVCR162245 datasheet, SN74LVCR162245 pinout, SN74LVCR162245 application, or SN74LVCR162245 equivalent, key selection criteria include VCC operating range (2.7–3.6 V), 5.5-V input tolerance, 8.5-ns max propagation delay at 3.3 V, bus-hold functionality, and TSSOP-48 package compatibility with industrial temperature range (–40°C to 85°C).
Technical Context
The SN74LVCR162245 implements two independent 8-bit transceiver sections, each controlled by dedicated DIR (direction) and OE (output enable) signals. Its dual-control architecture enables simultaneous or staggered A↔B data flow without internal contention.
Each I/O port integrates 26-Ω series termination to suppress overshoot/undershoot, and bus-hold circuitry maintains valid logic levels on floating inputs-eliminating external pull resistors. All outputs drive ±12 mA and support hot-swap capable 3-state isolation during power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - Ensures stable operation across modern low-voltage logic domains including 3.3-V LVTTL and mixed-supply systems. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct interfacing with legacy 5-V peripherals without level-shifting circuitry. |
| Max Propagation Delay | 8.5 ns at 3.3 V - Supports >100-MHz data rates in point-to-point or short-bus configurations. |
| Output Series Resistance | 26 Ω - Integrated termination reduces signal reflections and eliminates need for discrete series resistors on PCB. |
| Bus-Hold Current | ±75 µA at VI = 2 V - Actively holds unused inputs at valid logic levels, preventing metastability in partially loaded buses. |
| IOZ Leakage (3-State) | ±10 µA at 3.6 V - Guarantees high-impedance isolation integrity during device disable, critical for multi-drop bus arbitration. |
| ESD Rating | 2000-V HBM - Meets industrial-grade robustness requirements for handling and board-level reliability. |
Pinout & Package
TSSOP-48 (DGG) package: 12.6 mm × 6.2 mm × 1.2 mm body, 0.5-mm lead pitch, gull-wing leads, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Determines data flow direction: DIR = L → B-to-A; DIR = H → A-to-B; enables independent bidirectional control per half-bus. |
| 1OE, 2OE | Output enable input (per 8-bit section) | Active-low control: OE = L enables transceiver; OE = H forces all outputs into high-impedance state for bus isolation. |
| 1A1–1A8, 2A1–2A8 | Port A data terminals (input/output) | First and second 8-bit source/sink interface for A-side bus; tolerate up to 5.5 V regardless of VCC. |
| 1B1–1B8, 2B1–2B8 | Port B data terminals (input/output) | First and second 8-bit source/sink interface for B-side bus; identical voltage tolerance and drive strength as A ports. |
| VCC, GND | Power supply and ground | Four VCC and six GND pins distributed across package - reduce switching noise and improve PSRR in high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω output series resistors | Eliminates need for 32 external termination resistors in 16-bit configuration, reducing BOM count and layout area. |
| Bus-hold on all data inputs | Maintains stable logic states on unconnected or unterminated inputs, preventing oscillation and system lockup during initialization. |
| 5.5-V tolerant inputs at any VCC (2.7–3.6 V) | Enables seamless integration between 3.3-V logic and legacy 5-V peripherals without external translators or voltage dividers. |
| Low ground bounce (VOLP < 0.8 V) and undershoot (VOHV > 2 V) | Minimizes signal integrity degradation and crosstalk in dense PCB layouts with shared return paths. |
| Latch-up immunity > 250 mA per JESD-17 | Ensures robust operation under transient overvoltage or ESD events without destructive latch-up failure. |
Applications
| Memory Interface Subsystem | FPGA-to-ASIC Data Bridge |
|---|---|
Use Scenario: Bidirectional data exchange between DDR SDRAM controller and memory bus in embedded computing modules. IC Role / Device Role / Timing Role: Level-translating bus transceiver managing timing-critical read/write strobes and data lanes between mismatched voltage domains. Use Value: 8.5-ns tpd and 26-Ω termination ensure clean eye diagrams at 100+ MHz clock rates while eliminating external resistors and pull-ups. | Use Scenario: High-speed interconnect between Xilinx Artix FPGA I/O banks and ASIC-based peripheral controller in industrial PLC backplane. IC Role / Device Role / Timing Role: Asynchronous protocol-agnostic data shuttle enabling configurable A↔B routing per octet under independent DIR/OE control. Use Value: Dual 8-bit sections allow independent enable/control of address vs. data channels, improving timing margin and debug flexibility. |
| Hot-Swappable Backplane Slot | Legacy Peripheral Adapter |
Use Scenario: Isolating add-in card bus signals during live insertion/removal in telecom shelf management systems. IC Role / Device Role / Timing Role: 3-state isolation gate ensuring zero current injection into main backplane when card power is sequenced or absent. Use Value: Controlled OE assertion during power-up/down prevents bus contention; 5.5-V tolerance accommodates varying slot supply ramp profiles. | Use Scenario: Interfacing microcontroller GPIO expansion ports with 5-V RS-485 transceivers or optocoupled I/O modules. IC Role / Device Role / Timing Role: Voltage-tolerant buffer translating 3.3-V MCU logic levels to 5-V peripheral signaling while maintaining noise immunity. Use Value: Bus-hold function prevents floating inputs during MCU reset; no external biasing required even with intermittent peripheral connection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC162245DGGR | No bus-hold; 3.6-V max input tolerance (not 5.5 V); same 26-Ω outputs and pinout. | Lacks input state retention - requires external pull resistors if inputs float; unsuitable for unpopulated or dynamically reconfigured buses. | Select only when cost sensitivity outweighs robustness needs and all inputs are actively driven. |
| SN74AVC162245DGGR | Lower VCC range (1.2–3.6 V); higher speed (tpd ≤ 5.2 ns); no integrated 26-Ω resistors. | Supports 1.8-V/2.5-V domains but demands external termination; better for ultra-high-speed compact designs with tight timing budgets. | Prefer when migrating to sub-2-V logic families or requiring <6-ns delay; verify layout includes series resistors. |
Compared with SN74LVCR162245, SN74LVC162245DGGR sacrifices bus-hold and 5.5-V tolerance for lower cost, while SN74AVC162245DGGR trades integrated termination and robustness for wider voltage support and faster switching - making SN74LVCR162245 the optimal choice for industrial 3.3-V systems needing plug-and-play reliability.
Availability
SN74LVCR162245 is available at Aetrix Electronics and suitable for memory interface subsystems, FPGA-to-ASIC bridges, hot-swappable backplane slots, and legacy peripheral adapters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVCR162245 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 experience in high-reliability interface IC design.
The SN74LVCR162245 belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for noise-immune, high-speed bidirectional data transfer in industrial, telecom, and computing infrastructure where signal integrity and supply flexibility are critical.
FAQ
What is the maximum input voltage rating for SN74LVCR162245?
The SN74LVCR162245 supports input voltages up to 5.5 V regardless of VCC setting (2.7–3.6 V), enabling direct interfacing with 5-V peripherals without level shifters. This specification is verified per Absolute Maximum Ratings table in the SCES047E datasheet and applies to all A- and B-port data inputs, DIR, and OE pins.
Does SN74LVCR162245 require external pull-up or pull-down resistors on its data inputs?
No, SN74LVCR162245 does not require external pull-up or pull-down resistors because it integrates active bus-hold circuitry on all data inputs (A1–A8, B1–B8). This feature maintains valid logic levels on floating inputs, and using external resistors with bus-hold is explicitly discouraged in the datasheet.
What is the propagation delay of SN74LVCR162245 at 3.3 V?
The maximum propagation delay (tpd) of SN74LVCR162245 is 8.5 ns at VCC = 3.3 V, TA = 25°C, with CL = 50 pF. This value is measured from DIR or data input to corresponding output transition and is guaranteed across the full operating temperature range (–40°C to 85°C) per the Switching Characteristics table.
Can SN74LVCR162245 be used as a single 16-bit transceiver or only as two independent 8-bit units?
SN74LVCR162245 can be configured either as two independent 8-bit transceivers (using 1DIR/1OE and 2DIR/2OE separately) or as one unified 16-bit transceiver (by tying 1DIR = 2DIR and 1OE = 2OE). The functional diagram and truth table in the datasheet confirm this dual-mode capability without internal conflict.
What package type and lead finish does SN74LVCR162245DGGR use?
SN74LVCR162245DGGR uses a TSSOP-48 (DGG) package with 0.5-mm pitch, 12.6 mm × 6.2 mm body size, and NIPDAU (nickel-palladium-gold) lead finish. It is rated MSL Level-1 with unlimited floor life and compatible with standard Pb-free reflow profiles up to 260°C peak.
SN74LVCR162245DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCR
- Package/Case:
- 48-TFSOP (0.240", 6.10mm 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-TSSOP
SN74LVCR162245DGGR FAQ
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6.How does Aetrix verify that SN74LVCR162245DGGR is sourced from the original manufacturer or authorized distributors?
All SN74LVCR162245DGGR 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 SN74LVCR162245DGGR meets industry standards.
7.What is the process for return or replacement of SN74LVCR162245DGGR?
All SN74LVCR162245DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCR162245DGGR, 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 SN74LVCR162245DGGR part is unused and in its original packaging.
Return procedure for SN74LVCR162245DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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