Overview
The SN74CB3T3245PWR, produced by Texas Instruments, is a high-speed TTL-compatible 8-bit FET bus switch designed for low-voltage applications. This device supports mixed-mode signal operation on all data I/O ports, providing voltage translation that tracks the supply voltage (VCC). It is ideal for use in systems that require level translation between different voltage domains, such as 5-V TTL, 3.3-V LVTTL, and 2.5-V CMOS switching standards. The SN74CB3T3245PWR features a standard '245-type pinout and includes a single output-enable (OE) input, enabling easy integration into various digital systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2.3 | 3.6 | V | |
| VIN Control Input Voltage | -0.5 | 7 | V | |
| VI/O Switch I/O Voltage | -0.5 | 7 | V | |
| TA Operating Free-Air Temperature | -40 | 85 | °C | |
| RON ON-State Resistance | 5 | Ω | ||
| Cio(OFF) Input/Output Capacitance | 5 | pF | ||
| ICC Power Consumption | 40 | μA |
Key Features
- Standard '245-type pinout
- Output voltage translation tracks VCC
- Supports mixed-mode signal operation on all data I/O ports
- 5-V tolerant inputs with the device powered up or powered down
- Bidirectional data flow with near-zero propagation delay
- Low ON-state resistance (ron) of 5 Ω typical
- Low input and output capacitance (Cio(OFF) = 5 pF typical)
- Data and control inputs provide undershoot clamp diodes
- Low power consumption (ICC = 40 μA maximum)
- Supports partial-power-down mode operation
Applications
- Digital applications: level translation, PCI interface, USB interface, memory interleaving, bus isolation
- Connecting a 5-V bus to a 3.3-V device
- Low-power portable equipment
- Systems requiring voltage translation between different voltage domains (e.g., 5-V TTL, 3.3-V LVTTL, 2.5-V CMOS)
Q & A
- What is the primary function of the SN74CB3T3245PWR?
The primary function of the SN74CB3T3245PWR is to act as an 8-bit FET bus switch, providing voltage translation and supporting mixed-mode signal operation on all data I/O ports.
- What are the supported voltage ranges for the SN74CB3T3245PWR?
The device supports a VCC operating range from 2.3 V to 3.6 V and can handle data I/O voltages from 0 to 5 V.
- What is the typical ON-state resistance (ron) of the SN74CB3T3245PWR?
The typical ON-state resistance (ron) is 5 Ω.
- Does the SN74CB3T3245PWR support partial-power-down mode operation?
- What are the package options available for the SN74CB3T3245PWR?
The device is available in SSOP (20 pins), TVSOP (20 pins), SOIC (20 pins), and TSSOP (20 pins) packages.
- What is the operating temperature range for the SN74CB3T3245PWR?
The operating temperature range is from -40°C to 85°C.
- How does the SN74CB3T3245PWR handle input and output capacitance?
The device has low input and output capacitance, with Cio(OFF) typically at 5 pF.
- Can the SN74CB3T3245PWR be used in systems with different voltage domains?
- What is the power consumption of the SN74CB3T3245PWR?
The maximum power consumption (ICC) is 40 μA.
- Does the SN74CB3T3245PWR have any special features for protecting against voltage spikes?
