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Renesas 74FCT164245TPAG8
- Part No.:
- 74FCT164245TPAG8
- Manufacturer:
- Renesas
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74FCT164245TPAG8.pdf
- Description:
- IC TRANSLATOR BIDIR 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:13,559
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Product details
Overview
74FCT164245TPAG8 from Renesas Electronics (formerly IDT) is a 16-bit bidirectional voltage-level translator IC enabling interoperability between 3.3V and 5V digital buses. It features dual supply rails (VCC1 = 5V ±10%, VCC2 = 2.7–3.6V), active-low output enable (xOE), direction control (xDIR), and high-drive outputs (–32mA IOH, 64mA IOL on 5V port). It supports industrial temperature range (–40°C to +85°C) and is used in mixed-voltage backplane interfaces and hot-insertion board designs.
For engineers reviewing the 74FCT164245TPAG8 datasheet, 74FCT164245TPAG8 pinout, 74FCT164245TPAG8 application, or 74FCT164245TPAG8 equivalent, key selection criteria include bidirectional level translation capability, power-off disable for live insertion, 5V/3.3V port isolation, propagation delay ≤5 ns, and compatibility with TTL- and CMOS-level inputs on both sides.
Technical Context
The 74FCT164245TPAG8 implements two independent 8-bit transceivers or one unified 16-bit transceiver via xDIR and xOE controls. Its A port (3.3V side) and B port (5V side) operate with separate VCC2 and VCC1 supplies, supporting asymmetric voltage translation without external biasing. Control inputs accept logic levels from either voltage domain.
Designed with 0.5 µm CMOS technology, it integrates power-off disable on both ports, ensuring high-impedance states when either VCC1 or VCC2 is unpowered-critical for hot-swap backplane drivers. Absolute maximum terminal voltage ranges (–0.5 V to +7 V on non-VCC2 pins; –0.5 V to VCC1+0.5 V on VCC2) support robust system-level ESD resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Supply Range | 5V ±10% - powers 5V-side I/Os and enables full 64mA sink drive capability |
| VCC2 Supply Range | 2.7V to 3.6V - supports standard 3.3V LVTTL/LVCMOS interfaces with 15µA max input leakage |
| Propagation Delay | ≤5 ns (CL = 50pF, RL = 500Ω) - ensures timing-critical bus bridging up to ~100 MHz data rates |
| Output Drive (B port) | –32mA IOH / 64mA IOL - drives heavy capacitive loads (e.g., backplanes, long traces) without signal degradation |
| ESD Rating | >2000V HBM, >200V MM - meets MIL-STD-883 Class 3015 for industrial environments |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems and telecom infrastructure |
| Power Off Disable | Active on both ports - permits safe live insertion/removal of daughter cards without disrupting host bus operation |
Pinout & Package
TSSOP-48 package (Green, RoHS-compliant), 12.5 mm × 6.1 mm footprint, 0.5 mm pitch. Pin count: 48. Thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (active HIGH) | Selects data flow direction per 8-bit section: LOW = B→A, HIGH = A→B |
| 1OE, 2OE | Output enable input (active LOW) | Disables both A and B ports to high-impedance state regardless of xDIR state |
| 1A1–1A8, 2A1–2A8 | 3.3V-side I/O (A port) | Bidirectional interface pins tied to VCC2 (2.7–3.6V); tolerate 5V inputs |
| 1B1–1B8, 2B1–2B8 | 5V-side I/O (B port) | Bidirectional interface pins tied to VCC1 (4.5–5.5V); clamp diodes protect against overvoltage |
| VCC1, VCC2, GND | Power and ground terminals | Dual independent supplies: VCC1 for B-port logic/drive, VCC2 for A-port logic; multiple GND pins reduce ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional 3.3V ↔ 5V translation | Enables direct interconnection between legacy 5V TTL subsystems and modern 3.3V microcontrollers/FPGAs without external resistors or translators |
| Independent 8-bit channel control | Two DIR/OE pairs allow simultaneous but distinct data flows (e.g., control bus in one direction, data bus in the other) |
| Live insertion support | Power-off disable ensures no bus contention or current injection during hot-plug events in modular chassis systems |
| High noise immunity | 150 mV input hysteresis and guaranteed VIH/VIL thresholds (2.0V/0.8V min/max) prevent metastability in noisy industrial environments |
| Low ground bounce | Typical VOLP < 0.9V at VCC1=5V/VCC2=3.3V - maintains signal integrity under fast switching across 16 lines |
Applications
| Industrial Backplane Interface | Embedded System Voltage Bridging |
|---|---|
Use Scenario: Interfacing a 3.3V FPGA carrier board with legacy 5V peripheral modules in a modular PLC rack. IC Role / Device Role / Timing Role: Bidirectional level translator managing address/data/control signals across voltage domains with sub-5ns latency. Use Value: Eliminates need for discrete resistor networks or multiple single-bit translators, reducing BOM count and PCB area by >70% versus discrete solutions. | Use Scenario: Connecting a 3.3V ARM-based SoM to 5V CAN transceivers and RS-232 line drivers in an automotive diagnostic tool. IC Role / Device Role / Timing Role: Voltage-domain isolator enabling clean signal handoff while maintaining timing alignment across mixed-supply peripherals. Use Value: Supports concurrent operation of 5V analog front-ends and 3.3V digital logic without level-shifter-induced skew or setup/hold violations. |
| Hot-Swappable Module Design | Legacy System Modernization |
Use Scenario: Daughter card with 3.3V sensors and processors inserted into a powered 5V motherboard in test equipment. IC Role / Device Role / Timing Role: Bus protector providing automatic high-Z isolation when VCC1 or VCC2 is absent during insertion/removal. Use Value: Prevents bus contention and latch-up during live insertion, meeting IEC 61000-4-2 Level 4 ESD immunity requirements. | Use Scenario: Upgrading a 5V microcontroller-based medical device with a new 3.3V display controller and touch interface IC. IC Role / Device Role / Timing Role: Protocol-transparent bridge preserving SPI/I²C timing margins while translating logic levels. Use Value: Enables reuse of existing 5V power architecture and firmware stack without redesigning clock trees or signal integrity paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH16T245DGGR | Single-supply (1.2–3.6V), auto-direction sensing, lower drive (–12mA/12mA), 56-pin TSSOP | Requires no direction control signal; suited for I²C/SPI but not high-current backplane use | Choose for space-constrained, low-power applications where direction is data-dependent and drive strength <20mA suffices. |
| TXB0108PWR | Auto-bidirectional, 1.2–3.6V to 1.65–5.5V, 8-channel, 20mA drive, 20-pin TSSOP | Lacks independent OE/DIR per channel; unsuitable for 16-bit parallel bus translation | Prefer for low-pin-count, low-speed GPIO translation; not viable for wide synchronous bus bridging. |
Compared with SN74AVCH16T245DGGR and TXB0108PWR, the 74FCT164245TPAG8 delivers higher drive strength, deterministic direction control, and proven industrial reliability-making it optimal for high-capacitance, high-speed, and hot-swap-critical 16-bit bus translation.
Availability
74FCT164245TPAG8 is available at Aetrix Electronics and suitable for industrial backplane interfaces, embedded system voltage bridging, hot-swappable module designs, and legacy system modernization requiring stable component supply and long-term lifecycle support.
Supply support for 74FCT164245TPAG8 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, infrastructure, and IoT applications.
The 74FCT164245TPAG8 belongs to Renesas' legacy IDT logic portfolio, engineered specifically for robust, high-speed bidirectional voltage translation in mixed-supply industrial systems-prioritizing signal integrity, hot-swap safety, and long-term manufacturability.
FAQ
What is the function of the xDIR and xOE pins on the 74FCT164245TPAG8?
The 74FCT164245TPAG8 uses two xDIR (direction control) and two xOE (output enable) pins-one pair per 8-bit section-to configure data flow and output states independently. xDIR sets direction (LOW = B→A, HIGH = A→B); xOE (active LOW) forces both ports into high-impedance regardless of xDIR. This allows flexible partitioning of the 16-bit bus for concurrent bidirectional operations, such as separate address and data path control in the 74FCT164245TPAG8.
Can the 74FCT164245TPAG8 operate with VCC1 = 5V and VCC2 = 2.7V?
Yes, the 74FCT164245TPAG8 is fully specified for VCC1 = 5V ±10% and VCC2 = 2.7V to 3.6V. At VCC2 = 2.7V, DC electrical characteristics-including VIH (min 2.0V), VOL (max 0.4V at 16mA), and IIH/IIL (±15µA)-remain valid across the industrial temperature range. The 74FCT164245TPAG8 maintains reliable 3.3V-to-5V translation even at the lower VCC2 limit, supporting low-power 2.7V I/O standards.
Does the 74FCT164245TPAG8 support hot insertion?
Yes, the 74FCT164245TPAG8 supports hot insertion via power-off disable: when either VCC1 or VCC2 is unpowered, both A and B ports enter high-impedance mode automatically. This prevents bus contention and back-driving during live card insertion. The 74FCT164245TPAG8 also meets MIL-STD-883 ESD ratings (>2000V HBM), making it suitable for modular chassis systems requiring frequent field upgrades without system shutdown.
What is the maximum capacitive load the 74FCT164245TPAG8 can drive on the B port?
The 74FCT164245TPAG8 B port (5V side) is characterized for CL = 50pF in switching tests and supports sustained 64mA sink current-sufficient to drive ≥100pF loads at full speed with marginal timing margin. Real-world performance depends on trace impedance and termination; for >100pF or >10-inch traces, derating propagation delay by ≤1.5ns is recommended. The 74FCT164245TPAG8 datasheet confirms stable operation driving backplanes and multi-drop buses typical in industrial control systems.
Is the 74FCT164245TPAG8 pin-compatible with earlier IDT FCT164245 variants?
Yes, the 74FCT164245TPAG8 shares identical pinout, function mapping, and AC/DC specifications with IDT's original 74FCT164245T in TSSOP-48 (PAG) packaging. Renesas maintains full backward compatibility-including identical DIR/OE polarity, voltage tolerances, and timing parameters-ensuring drop-in replacement for legacy designs using the 74FCT164245TPAG8 without layout or firmware changes.
74FCT164245TPAG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74FCT
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 2
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 2.7 V ~ 3.6 V
- Voltage - VCCB:
- 4.5 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TFSOP (0.240", 6.10mm Width)
74FCT164245TPAG8 FAQ
1.How can I place an order for 74FCT164245TPAG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT164245TPAG8 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 74FCT164245TPAG8 reliable?
The price and inventory of 74FCT164245TPAG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT164245TPAG8 is usually 5 days.
3.What payment methods are accepted for 74FCT164245TPAG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT164245TPAG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT164245TPAG8?
74FCT164245TPAG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT164245TPAG8 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 74FCT164245TPAG8?
For technical support, including 74FCT164245TPAG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT164245TPAG8 requirements.
6.How does Aetrix verify that 74FCT164245TPAG8 is sourced from the original manufacturer or authorized distributors?
All 74FCT164245TPAG8 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 74FCT164245TPAG8 meets industry standards.
7.What is the process for return or replacement of 74FCT164245TPAG8?
All 74FCT164245TPAG8 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT164245TPAG8, 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 74FCT164245TPAG8 part is unused and in its original packaging.
Return procedure for 74FCT164245TPAG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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