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Renesas 74CBTLV3244PGG8
- Part No.:
- 74CBTLV3244PGG8
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74CBTLV3244PGG8.pdf
- Description:
- IC BUS SWITCH 4 X 1:1 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
74CBTLV3244PGG8 from Renesas Electronics is a low-voltage octal bus switch with dual 4-channel bi-directional switches, 5Ω on-resistance at 3.3V, VCC range of 2.3V–3.6V, and industrial temperature operation (−40°C to +85°C), used for high-speed 3.3V bus isolation and asynchronous data bus communication.
For engineers reviewing the 74CBTLV3244PGG8 datasheet, 74CBTLV3244PGG8 pinout, 74CBTLV3244PGG8 application, or 74CBTLV3244PGG8 equivalent, key selection criteria include bidirectional switching capability, power-off isolation, over-voltage tolerance up to 4.6V, latch-up immunity (>100mA), and TSSOP-20 package compatibility with standard '244 logic footprints.
Technical Context
The 74CBTLV3244PGG8 implements two independent 4-bit bus switch sections, each controlled by an active-low output enable (1OE, 2OE). When enabled, it provides low-impedance bidirectional conduction between Port A and Port B; when disabled, it presents high-impedance isolation with IOFF ≤ 50µA at VCC = 0V.
It operates across 2.3V–3.6V supply, supports 50pF load capacitance, achieves propagation delay ≤ 0.25ns (at 3.3V), and maintains over-voltage tolerance on I/O pins (−0.5V to +4.6V) independent of VCC, enabling safe hot-swap and mixed-voltage interface operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V–3.6V - Enables direct integration into 2.5V/3.3V logic systems without level translation. |
| RON (Typ.) | 5Ω at 3.3V - Ensures minimal signal attenuation and <0.25ns propagation delay in high-speed buses. |
| IOFF (Max) | 50µA at VCC = 0V - Guarantees robust power-off isolation for system-level bus contention prevention. |
| Over-Voltage Tolerance | −0.5V to +4.6V on I/O - Allows safe interfacing with 5V-tolerant peripherals without external clamping. |
| Operating Temp | −40°C to +85°C - Qualified for industrial environments including factory automation and telecom infrastructure. |
| ESD Rating | 2000V HBM, 200V MM - Meets MIL-STD-883 requirements for handling robustness in manufacturing and field use. |
| tEN / tDIS | 1–4.5ns enable/disable - Supports nanosecond-scale bus arbitration and dynamic reconfiguration. |
Pinout & Package
TSSOP-20 (PGG20) package: 6.5mm × 4.4mm body, 0.65mm pitch, exposed pad not present, RoHS-compliant green finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE / 2OE | Active-low enable controls first/second 4-bit switch bank; must be pulled up to VCC during power sequencing. |
| 2–5, 12–15 | 1A1–1A4 / 2A1–2A4 | Port A bidirectional I/Os - connect to upstream bus or controller side. |
| 6–9, 16–18, 20 | 1B1–1B4 / 2B1–2B4 / GND | Port B bidirectional I/Os and ground - link to downstream bus or peripheral side. |
| 10, 11 | VCC / GND | Primary power and reference - decoupling capacitor required within 1cm of pins 10 and 11. |
Key Features
| Feature | Design Value |
|---|---|
| PIN-compatible with '244 logic | Direct drop-in replacement for legacy 74LS244/74HC244 in existing PCB layouts using TSSOP-20 footprint. |
| Bi-directional 5Ω switch | Enables transparent, polarity-agnostic signal routing between buses without direction control logic. |
| Power-off isolation | IOFF ≤ 50µA ensures zero current leakage between ports when VCC = 0, critical for hot-plug safety. |
| Over-voltage tolerant I/O | Withstands −0.5V to +4.6V on all A/B pins regardless of VCC state - eliminates need for external protection diodes. |
| Latch-up immunity | Exceeds 100mA per JEDEC JESD78 - prevents destructive latch-up during transient overvoltage events. |
Applications
| PCI Express Slot Isolation | Industrial Backplane Bus Switching |
|---|---|
Use Scenario: Isolating PCIe root complex from add-in cards during hot-plug insertion/removal to prevent bus contention. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling/disabling 8-lane data path under firmware-controlled OE signals. Use Value: Prevents signal corruption and power rail disturbance during card insertion, leveraging 5Ω RON and sub-5ns enable timing. | Use Scenario: Dynamically routing sensor data from multiple I/O modules to a central controller in modular PLC backplanes. IC Role / Device Role / Timing Role: Octal bus switch providing configurable 4+4 channel connectivity between isolated bus segments. Use Value: Enables real-time reconfiguration without bus shutdown, supported by −40°C to +85°C operation and 50µA IOFF isolation. |
| 3.3V Memory Subsystem Buffering | Multi-Voltage FPGA I/O Interface |
Use Scenario: Isolating DDR SDRAM address/control lines from SoC during low-power sleep modes to reduce leakage. IC Role / Device Role / Timing Role: Low-latency switch disconnecting memory bus while preserving signal integrity via 5Ω on-resistance. Use Value: Cuts standby current by blocking leakage paths, validated by 2000V HBM ESD rating for reliability in memory subsystems. | Use Scenario: Interfacing 3.3V FPGA I/O banks with 5V legacy peripherals in test equipment or instrumentation. IC Role / Device Role / Timing Role: Over-voltage tolerant bus switch translating voltage domains without level shifters. Use Value: Eliminates external voltage translators using ±0.5V to +4.6V I/O tolerance, reducing BOM count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3244PWR | TI part in TSSOP-20; RON = 6Ω typical at 3.3V; identical pinout and DC specs. | Same industrial temp range and bus isolation function; minor RON variance has negligible impact on <100MHz buses. | Preferred where TI supply chain alignment or dual-sourcing is required; no layout change needed. |
| 74LVC244APW,118 | NXP part is non-bidirectional 3-state buffer (not bus switch); higher RON (~20Ω), no power-off isolation. | Suitable only for unidirectional buffering; lacks IOFF and over-voltage tolerance - requires external protection. | Select only if directionality is fixed and isolation not required; verify I/O voltage limits separately. |
Compared with SN74CBTLV3244PWR and 74LVC244APW,118, the 74CBTLV3244PGG8 uniquely delivers true bidirectional 5Ω switching with guaranteed power-off isolation and ±0.5V to +4.6V I/O tolerance - making it optimal for dynamic bus reconfiguration and mixed-voltage interconnects where signal transparency and safety are critical.
Availability
74CBTLV3244PGG8 is available at Aetrix Electronics and suitable for industrial backplane switching, PCIe hot-plug isolation, and 3.3V memory subsystem buffering requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 74CBTLV3244PGG8 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, and datacenter applications.
The 74CBTLV3244PGG8 belongs to Renesas' CBTLV low-voltage bus switch family, engineered specifically for high-speed, low-latency, and fail-safe 3.3V bus isolation in industrial and communications infrastructure.
FAQ
What is the maximum operating voltage on the I/O pins of the 74CBTLV3244PGG8?
The 74CBTLV3244PGG8 supports an absolute maximum I/O voltage range of −0.5V to +4.6V, independent of VCC level. This over-voltage tolerance allows safe interfacing with 5V peripherals even when VCC is at 3.3V or lower, eliminating the need for external clamping diodes in mixed-voltage systems.
Does the 74CBTLV3244PGG8 require external pull-up resistors on its OE pins?
Yes - to ensure a defined high-impedance state during power-up and power-down, both 1OE and 2OE pins of the 74CBTLV3244PGG8 must be tied to VCC through external pull-up resistors. This prevents undefined switch states that could cause bus contention or excessive current draw before firmware initialization.
Can the 74CBTLV3244PGG8 be used in hot-swap applications?
Yes - the 74CBTLV3244PGG8 is explicitly designed for hot-swap use, featuring power-off isolation (IOFF ≤ 50µA), over-voltage tolerant I/Os, and latch-up immunity exceeding 100mA. These characteristics protect downstream circuitry during live insertion/removal in backplane and modular system architectures.
What is the typical on-resistance of the 74CBTLV3244PGG8 at 2.5V supply?
At VCC = 2.5V, the 74CBTLV3244PGG8 exhibits a typical on-resistance (RON) of 5Ω when VI = 0V and IO = 64mA. This low resistance ensures minimal voltage drop and signal distortion, supporting clean signal transmission in low-voltage, high-speed digital interfaces.
Is the 74CBTLV3244PGG8 pin-compatible with older 74-series logic devices?
Yes - the 74CBTLV3244PGG8 maintains pin-out compatibility with standard '244 logic devices such as 74LS244 and 74HC244 in TSSOP-20 packages. This enables drop-in upgrades to lower voltage, lower power, and higher speed operation without PCB redesign.
74CBTLV3244PGG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74CBTLV
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 4 x 1:1
- Independent Circuits:
- 2
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74CBTLV3244PGG8 FAQ
1.How can I place an order for 74CBTLV3244PGG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3244PGG8 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 74CBTLV3244PGG8 reliable?
The price and inventory of 74CBTLV3244PGG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3244PGG8 is usually 5 days.
3.What payment methods are accepted for 74CBTLV3244PGG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3244PGG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74CBTLV3244PGG8?
74CBTLV3244PGG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3244PGG8 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 74CBTLV3244PGG8?
For technical support, including 74CBTLV3244PGG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3244PGG8 requirements.
6.How does Aetrix verify that 74CBTLV3244PGG8 is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3244PGG8 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 74CBTLV3244PGG8 meets industry standards.
7.What is the process for return or replacement of 74CBTLV3244PGG8?
All 74CBTLV3244PGG8 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3244PGG8, 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 74CBTLV3244PGG8 part is unused and in its original packaging.
Return procedure for 74CBTLV3244PGG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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