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STMicroelectronics 74VCX162245TTR
- Part No.:
- 74VCX162245TTR
- Manufacturer:
- STMicroelectronics
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74VCX162245TTR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,644
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Product details
Overview
74VCX162245TTR from STMicroelectronics is a low-voltage CMOS 16-bit bus transceiver (3-state) with dual-output impedance profiles, 3.6V-tolerant I/O, and asymmetric A/B port drive strengths (12mA/24mA at 3.0V). It supports bidirectional asynchronous data transfer between buses under DIR control and features integrated 26Ω series resistors on A-port outputs to suppress high-speed line noise. Used in voltage-level-agile memory and peripheral interconnects within 1.8–3.6V systems.
For engineers reviewing the 74VCX162245TTR datasheet, 74VCX162245TTR pinout, 74VCX162245TTR application, or 74VCX162245TTR equivalent, this device is selected for mixed-voltage bus bridging where differential drive capability, ESD-hardened I/O (2kV HBM), and precise propagation delay matching (≤0.5ns skew) are critical design requirements.
Technical Context
This transceiver implements two independent 8-bit bidirectional data paths (A↔B), each controlled by dedicated DIR and G inputs. Directional flow is determined solely by the logic level on DIR pins (1DIR/2DIR), while output enable is asserted low on nG pins (1G/2G), placing ports in high-impedance state when inactive.
It features electrically distinct A and B output stages: A-side delivers symmetrical ±12mA/±8mA/±4mA drive across 3.0–3.6V/2.3–2.7V/1.8V VCC ranges, while B-side provides higher ±24mA/±18mA/±6mA drive - enabling optimized signal integrity per path. All I/O tolerate up to 3.6V regardless of VCC, supporting safe interfacing with legacy 3.3V subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.8V to 3.6V - enables operation across multiple low-voltage logic families without level shifters. |
| tPD (A→B, 3.0–3.6V) | 3.4 ns max - ensures sub-4ns latency for time-critical address/data transfers in high-speed peripherals. |
| tPD (B→A, 3.0–3.6V) | 2.5 ns max - fastest path for write-back or response traffic requiring minimal propagation delay. |
| IOL/IOH (B-side, 3.0V) | ±24 mA - drives heavier capacitive loads (e.g., long traces, multiple receivers) without external buffers. |
| Input/Output Tolerance | 3.6V - allows direct connection to 3.3V buses while powered from 1.8V, simplifying mixed-voltage board design. |
| ESD Rating (HBM) | >2000 V - meets industrial-grade robustness requirements for handling and assembly environments. |
| Output Skew | ≤0.5 ns - guarantees tight timing alignment across all 8 bits of a port, critical for parallel bus setup/hold compliance. |
Pinout & Package
TSSOP-48 package with 0.5 mm pitch, 12.6 mm × 8.1 mm body size, and exposed thermal pad (non-electrical). Pin 1 marked via beveled corner; pin numbering follows standard counter-clockwise convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24 | DIR (1DIR, 2DIR) | Direction control input: LOW = A→B data flow; HIGH = B→A data flow. |
| 4, 10, 15, 21, 28, 34, 39, 45 | GND | Ground reference for all internal circuitry and I/O stages; eight dedicated pins minimize ground bounce. |
| 7, 18, 31, 42 | VCC | Single supply rail for entire IC; four distributed pins reduce supply impedance and improve noise immunity. |
| 2–3, 5–6, 8–9, 11–12 | 1B1–1B8 | Bus B side I/O for first 8-bit channel; 3.6V-tolerant, ±24mA capable (B-side). |
| 13–14, 16–17, 19–20, 22–23 | 2B1–2B8 | Bus B side I/O for second 8-bit channel; identical electrical specs to 1Bx pins. |
| 26–27, 29–30, 32–33, 35–36 | 2A1–2A8 | Bus A side I/O for second channel; includes integrated 26Ω series resistor per output for EMI reduction. |
| 38, 40, 41, 43, 44, 46, 47, 48 | 1A1–1A8, 1G | A-side I/O (1A1–1A8) and channel 1 output enable (1G, active-low); 1A pins also feature 26Ω series resistance. |
| 25, 48 | 2G, 1G | Active-low output enable inputs: LOW enables transceiver; HIGH forces all I/O into high-Z state. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-drive output architecture | A-port: ±12mA @ 3.0V with built-in 26Ω series termination; B-port: ±24mA @ 3.0V - enables matched drive strength per signal path requirement. |
| 3.6V-tolerant I/O | All inputs and outputs operate safely at up to 3.6V even when VCC = 1.8V - eliminates need for external level translators in mixed-voltage designs. |
| Sub-3ns propagation delay (B→A) | 2.5 ns max at 3.0–3.6V - supports >300 MHz bus toggle rates while maintaining timing margin for setup/hold windows. |
| High-impedance power-down protection | Inputs and outputs remain protected against static discharge and floating states during disable - prevents bus contention and latch-up. |
| Low dynamic noise generation | Integrated 26Ω resistors on A-port outputs suppress ringing and overshoot on fast edges, reducing radiated emissions in dense PCB layouts. |
Applications
| Memory Subsystem Interconnect | Peripheral Bridge Interface |
|---|---|
|
Use Scenario: Bidirectional data exchange between 1.8V SoC memory controller and 3.3V DDR SDRAM module. IC Role / Device Role / Timing Role: Voltage-tolerant bus transceiver managing direction and isolation between mismatched voltage domains. Use Value: Eliminates discrete level shifters while maintaining <3.4ns A→B delay and 2.5ns B→A delay for tight memory timing budgets. |
Use Scenario: Isolating and translating signals between 2.5V FPGA configuration interface and 3.3V USB PHY controller. IC Role / Device Role / Timing Role: Dual-channel transceiver enabling concurrent read/write handshaking with independent DIR/G control per channel. Use Value: 0.5ns max output skew ensures simultaneous bit arrival across 16-bit control bus, preventing protocol framing errors. |
| Industrial Backplane Bus | Automotive Infotainment Data Link |
|
Use Scenario: High-reliability data routing across modular PLC backplane operating at 1.8V core and 3.3V I/O levels. IC Role / Device Role / Timing Role: Fault-isolated bus repeater with power-down protection and 2kV HBM ESD hardening. Use Value: Latch-up immunity >300mA (JESD17) and -55°C to +125°C operation ensure uninterrupted function in harsh industrial environments. |
Use Scenario: Interfacing 1.8V ADAS processor with 3.3V display timing controller in automotive head unit. IC Role / Device Role / Timing Role: Low-power, high-speed transceiver providing bidirectional pixel clock and data lane translation. Use Value: 26Ω A-port series resistors reduce EMI in sensitive RF-rich cabin environments without sacrificing rise/fall time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC162245DGGR | Lower drive (±24mA only on both sides), no integrated series resistors, 3.6V tolerance confirmed. | Lacks A-port noise suppression; requires external termination for EMI-sensitive layouts. | Select when cost sensitivity outweighs EMI performance and board space permits discrete resistors. |
| 74ALVC162245PW | Higher ICC (up to 40µA vs. 20µA), same pinout, but no 26Ω resistors and narrower VCC range (2.3–3.6V). | Not suitable for 1.8V-only systems; lacks low-voltage operational margin below 2.3V. | Choose only if system operates strictly above 2.3V and lower quiescent current is not required. |
Compared with SN74LVC162245DGGR and 74ALVC162245PW, the 74VCX162245TTR uniquely combines 1.8V operation, integrated A-port termination, and tighter skew control - making it optimal for compact, noise-constrained, multi-voltage embedded interconnects.
Availability
74VCX162245TTR is available at Aetrix Electronics and suitable for memory subsystem interconnects, industrial backplane buses, automotive infotainment data links, and peripheral bridge interfaces requiring stable component supply across extended temperature and voltage ranges.
Supply support for 74VCX162245TTR 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 microcontrollers, analog ICs, power management devices, and discrete components for industrial, automotive, and consumer markets.
The VCX logic family targets ultra-low-voltage, high-speed digital interfacing with enhanced noise immunity and mixed-signal compatibility - specifically engineered for next-generation portable and embedded systems operating down to 1.8V.
FAQ
What is the maximum operating temperature range for the 74VCX162245TTR?
The 74VCX162245TTR is rated for operation from –55°C to +125°C, meeting extended industrial and automotive under-hood requirements. This range is validated per JEDEC JESD78 and supported by full DC/AC characterization across the entire span, including propagation delay, drive strength, and leakage specifications.
Can the 74VCX162245TTR be used with a 1.8V supply while interfacing to a 3.3V bus?
Yes - all inputs and outputs are explicitly rated for 3.6V tolerance regardless of VCC. When powered at 1.8V, the device safely accepts and drives 3.3V signals without damage or level-shifting circuitry, enabling direct connection to legacy 3.3V peripherals while minimizing system power consumption.
Why does the A-port have 26Ω series resistors but the B-port does not?
The 26Ω resistors are integrated only on A-port outputs to dampen high-frequency reflections and reduce EMI on typically shorter, more noise-sensitive local bus segments. The B-port's higher drive strength (±24mA) is intended for longer or more heavily loaded paths where active drive dominates over passive termination needs.
Is the 74VCX162245TTR pin-compatible with standard 74-series 162245 devices?
Yes - it is pin- and function-compatible with industry-standard 74-series 162245 transceivers, including identical pin mapping for DIR, G, A/B I/O, VCC, and GND. However, its VCX-specific electrical behavior (e.g., 1.8V operation, 3.6V tolerance, skew performance) exceeds legacy 74AC/74ALS specifications.
74VCX162245TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74VCX
- 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; 24mA, 24mA
- Voltage - Supply:
- 1.8V ~ 3.6V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74VCX162245TTR FAQ
1.How can I place an order for 74VCX162245TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VCX162245TTR 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 74VCX162245TTR reliable?
The price and inventory of 74VCX162245TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCX162245TTR is usually 5 days.
3.What payment methods are accepted for 74VCX162245TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCX162245TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VCX162245TTR?
74VCX162245TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VCX162245TTR 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 74VCX162245TTR?
For technical support, including 74VCX162245TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCX162245TTR requirements.
6.How does Aetrix verify that 74VCX162245TTR is sourced from the original manufacturer or authorized distributors?
All 74VCX162245TTR 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 74VCX162245TTR meets industry standards.
7.What is the process for return or replacement of 74VCX162245TTR?
All 74VCX162245TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74VCX162245TTR, 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 74VCX162245TTR part is unused and in its original packaging.
Return procedure for 74VCX162245TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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