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STMicroelectronics 74VCXR162245TTR
- Part No.:
- 74VCXR162245TTR
- Manufacturer:
- STMicroelectronics
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74VCXR162245TTR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,305
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Product details
Overview
74VCXR162245TTR from STMicroelectronics is a low-voltage CMOS 16-bit bus transceiver (3-state) with 3.6V-tolerant I/O, symmetrical ±12mA drive at 3.0–3.6V, 3.4ns max propagation delay, and integrated 26Ω series output resistors. It enables bidirectional data flow between asynchronous buses in 1.8–3.6V systems such as DDR memory interfaces and FPGA I/O expansion.
For engineers reviewing the 74VCXR162245TTR datasheet, 74VCXR162245TTR pinout, 74VCXR162245TTR application, or 74VCXR162245TTR equivalent, key selection criteria include voltage-range compatibility (1.8–3.6V), DIR-controlled directionality, dual enable (1G/2G), 3.6V I/O tolerance for mixed-supply interconnects, and built-in noise suppression via on-die 26Ω termination.
Technical Context
This transceiver implements two independent 8-bit bidirectional data paths (A↔B), each controlled by dedicated DIR and G inputs. Direction is determined solely by the DIR signal level, while G asserts high-impedance state on both ports simultaneously.
It uses sub-micron C2MOS process with five-layer metal routing to achieve low ICC (20µA quiescent) and rail-to-rail 3.6V-tolerant I/O across 1.8–3.6V VCC. The integrated 26Ω series resistors per output reduce simultaneous switching noise without requiring external termination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.8V to 3.6V - supports direct interface with 1.8V, 2.5V, and 3.3V logic domains |
| tPD (Max) | 3.4ns at 3.0–3.6V - enables >200MHz bus operation in high-speed digital systems |
| IOL/IOH (Min) | ±12mA at VCC = 3.0–3.6V - drives standard CMOS loads with margin for fanout and trace capacitance |
| Input/Output Tolerance | 3.6V - allows safe connection to legacy 3.3V buses without level shifters |
| Series Resistance | 26Ω per A/B port output - suppresses ringing and EMI in PCB traces up to 15cm |
| ESD Rating | HBM >2000V - protects against handling damage during assembly and field operation |
| Operating Temp | −55°C to +125°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
TSSOP-48 package (4.4mm × 12.5mm body, 0.5mm pitch), thermally enhanced for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24 | DIR | Direction control for Port 1 and Port 2 respectively - LOW enables A→B, HIGH enables B→A |
| 4, 10, 15, 21, 28, 34, 39, 45 | GND | Eight ground connections - minimize ground bounce and improve noise immunity in 16-bit parallel paths |
| 7, 18, 31, 42 | VCC | Four power supply pins - reduce IR drop and stabilize VCC under fast switching of all 16 outputs |
| 48, 25 | 1G, 2G | Active-low output enable for Port 1 and Port 2 - independently isolate either bus segment |
| 2–3, 5–6, 8–9, 11–12, 13–14, 16–17, 19–20, 22–23 | 1B1–1B8, 2B1–2B8 | B-side bidirectional I/O - connect to system data bus or peripheral interface |
| 26–27, 29–30, 32–33, 35–36, 38, 40–41, 43–44, 46–47 | 2A1–2A8, 1A1–1A8 | A-side bidirectional I/O - connect to processor/FPGA or memory controller bus |
Key Features
| Feature | Design Value |
|---|---|
| 3.6V-tolerant I/O | Enables interoperability with 3.3V systems without external level translators or clamping diodes |
| Integrated 26Ω series resistors | Eliminates need for discrete series termination on each line - reduces BOM count and layout area |
| Symmetrical drive strength | Equal |IOH| and |IOL| ensures consistent rise/fall times and reduced duty-cycle distortion |
| Power-down protection | Prevents back-driving and latch-up when VCC = 0V - safe for hot-swap and partial-power-down scenarios |
| Latch-up immunity >300mA | Meets JESD17 Class II - robust against transient overvoltage events in noisy industrial environments |
Applications
| DDR Memory Interface | FPGA I/O Expansion |
|---|---|
Use Scenario: Bidirectional data transfer between DDR SDRAM and memory controller in portable computing platforms. IC Role / Device Role / Timing Role: Level-shifting bus transceiver enabling 1.8V controller to drive 3.3V-tolerant DDR address/data lines with timing-critical 3.4ns propagation. Use Value: Eliminates discrete level shifters and reduces signal integrity risk via on-die 26Ω termination matching PCB trace impedance. | Use Scenario: Extending FPGA GPIO count to interface with multiple legacy peripherals operating at different voltage rails. IC Role / Device Role / Timing Role: Voltage-flexible bidirectional bridge isolating FPGA core logic (1.8V) from 3.3V sensors, displays, and communication ICs. Use Value: Single-chip solution supports mixed-voltage domain isolation with independent DIR/G control per 8-bit segment. |
| Industrial PLC Backplane | Automotive Infotainment Gateway |
Use Scenario: Data arbitration between multiple microcontrollers on a shared 16-bit parallel backplane in programmable logic controllers. IC Role / Device Role / Timing Role: Asynchronous bus isolator with dual enable (1G/2G) allowing dynamic segmentation of control and status data lanes. Use Value: −55°C to +125°C rating and >300mA latch-up immunity ensure reliability in uncontrolled cabinet environments. | Use Scenario: Interfacing ADAS sensor cluster (1.8V) with infotainment head unit (3.3V) over short-reach parallel video or control bus. IC Role / Device Role / Timing Role: ESD-hardened (2kV HBM) transceiver providing fault-tolerant bidirectional communication in automotive EMC-critical zones. Use Value: Integrated 26Ω resistors suppress radiated emissions from high-speed video/control signals routed near RF modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit bidirectional bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC162245DGGR | Lower drive (±24mA), no integrated series resistors, 1.65–3.6V range | Requires external 26Ω termination per line; higher current draw increases power in dense layouts | Preferred where maximum drive strength is required and board space permits discrete termination |
| 74ALVC162245PW | Same 1.8–3.6V range and 3.6V I/O tolerance, but no on-die 26Ω resistors | Lacks built-in noise suppression - susceptible to overshoot/ringing on long traces without careful layout | Selected when cost sensitivity outweighs EMI mitigation needs and layout constraints allow external termination |
Compared with SN74LVC162245DGGR and 74ALVC162245PW, the 74VCXR162245TTR uniquely integrates 26Ω series resistors per output - reducing design iteration time, PCB layer count, and radiated emissions without sacrificing voltage flexibility or temperature range.
Availability
74VCXR162245TTR is available at Aetrix Electronics and suitable for DDR memory interfaces, FPGA I/O expansion, industrial PLC backplanes, and automotive infotainment gateways requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for 74VCXR162245TTR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.
The VCX series targets ultra-low-power, high-speed logic interfacing - specifically engineered for voltage-scalable bidirectional data bridging in battery-powered and thermally constrained embedded systems.
FAQ
What is the maximum clock frequency supported by the 74VCXR162245TTR?
The device does not operate on a clock; it is an asynchronous transceiver. Its 3.4ns maximum propagation delay at 3.0–3.6V enables reliable operation with data rates exceeding 200MHz on well-terminated 16-bit buses. Timing depends on load capacitance, trace length, and drive strength - verified at CL = 30pF and RL = 500Ω per AC test conditions.
Can 74VCXR162245TTR be used with 1.2V logic systems?
No. The absolute minimum operating VCC is 1.8V per recommended conditions. At 1.2V, internal circuitry fails to meet VIH/VIL thresholds, and output drive collapses below specification. For 1.2V systems, consider ST's 74LVC162245 variants with 1.65V min VCC, but note loss of 3.6V I/O tolerance.
How does the 26Ω series resistor affect signal integrity?
The 26Ω resistor is placed in series with each A/B port output and functions as source termination. When matched to typical PCB trace impedance (50–75Ω), it damps reflections and reduces overshoot/ringing - particularly critical for edges with <1ns rise time. Measured dynamic peak/valley voltages confirm ≤±0.35V excursion at 3.3V VCC.
Is the 74VCXR162245TTR pin-compatible with standard 74-series transceivers?
Yes - it is explicitly pin- and function-compatible with the 74R162245 family. Pin numbering, DIR/G control logic, and I/O mapping match industry-standard 48-pin TSSOP layout. However, its 3.6V I/O tolerance and integrated 26Ω resistors provide functional enhancements not present in legacy 74-series parts.
74VCXR162245TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74VCXR
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- 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:
- 1.8V ~ 3.6V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74VCXR162245TTR FAQ
1.How can I place an order for 74VCXR162245TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VCXR162245TTR 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 74VCXR162245TTR reliable?
The price and inventory of 74VCXR162245TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCXR162245TTR is usually 5 days.
3.What payment methods are accepted for 74VCXR162245TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCXR162245TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VCXR162245TTR?
74VCXR162245TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VCXR162245TTR 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 74VCXR162245TTR?
For technical support, including 74VCXR162245TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCXR162245TTR requirements.
6.How does Aetrix verify that 74VCXR162245TTR is sourced from the original manufacturer or authorized distributors?
All 74VCXR162245TTR 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 74VCXR162245TTR meets industry standards.
7.What is the process for return or replacement of 74VCXR162245TTR?
All 74VCXR162245TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74VCXR162245TTR, 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 74VCXR162245TTR part is unused and in its original packaging.
Return procedure for 74VCXR162245TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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