사양
| 속성 | 가치 |
| Supplier | Texas Instruments |
| Package / Case | Tape & Reel (TR) |
| Series | 74AXC |
| Part Status | Active |
| Logic Type | Translation Transceiver |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| Output Type | 3-State |
| Current - Output High Low | 12mA, 12mA |
| Voltage - Supply | 0.65V ~ 3.6V |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount |
개요
Description
SN74AXCH4T245RSVR is a 4‑bit bidirectional bus transceiver with dual supplies and level shifting. It links two sides (A and B) and translates data between different logic levels, controlled by DIR. OE enables/disables the outputs (high‑Z when disabled), allowing bus sharing.
Key points
- 4 data lines on each side: A1–A4 and B1–B4
- DIR selects direction (A→B or B→A); OE to enable/disable
- Dual supplies: VCCA and VCCB for voltage-level translation
- Ioff/partial-power-down protection (no back-powering when a supply is off)
- 3‑state outputs suitable for bus interfaces
- RSVR suffix indicates tape‑and‑reel packaging for automated assembly
Typical uses
- Level shifting between devices with different logic voltages
- Bidirectional data bus interfacing (MCUs, memories, peripherals)
- Backplane or interconnects requiring controlled, tri‑state bidirectional data paths
For exact electrical specs and timing, consult the TI datasheet.
Key points
- 4 data lines on each side: A1–A4 and B1–B4
- DIR selects direction (A→B or B→A); OE to enable/disable
- Dual supplies: VCCA and VCCB for voltage-level translation
- Ioff/partial-power-down protection (no back-powering when a supply is off)
- 3‑state outputs suitable for bus interfaces
- RSVR suffix indicates tape‑and‑reel packaging for automated assembly
Typical uses
- Level shifting between devices with different logic voltages
- Bidirectional data bus interfacing (MCUs, memories, peripherals)
- Backplane or interconnects requiring controlled, tri‑state bidirectional data paths
For exact electrical specs and timing, consult the TI datasheet.
Equivalent
The SN74AXCH4T245RSVR is an 8-bit bidirectional bus transceiver (AXCH family). Equivalents from other vendors include:
- MC74AXCH4T245 (ON Semiconductor)
- 74AXCH4T245 (Nexperia/other vendors)
- 74HC245 or 74HCT245 (alternative 8-bit transceivers; check voltage/pin compatibility)
For exact cross references, consult Digi-Key/Mouser cross-reference data.
- MC74AXCH4T245 (ON Semiconductor)
- 74AXCH4T245 (Nexperia/other vendors)
- 74HC245 or 74HCT245 (alternative 8-bit transceivers; check voltage/pin compatibility)
For exact cross references, consult Digi-Key/Mouser cross-reference data.
Features
SN74AXCH4T245RSVR features:
- 4-bit bidirectional transceiver with two 4-bit data paths (A and B)
- Direction control input (DIR): selects A→B or B→A
- Output enable (OE, active low): tri-states both sides when asserted
- True 3-state outputs on both buses
- Ioff protection for partial-power-down without back-powering
- Wide operating voltage: 1.65 V to 3.6 V (CMOS)
- High-speed CMOS with low static power
- ESD protection for robustness
- Packaging note: RSVR indicates Tape & Reel option
For exact electrical specs (drive, timing, etc.), refer to the TI datasheet.
- 4-bit bidirectional transceiver with two 4-bit data paths (A and B)
- Direction control input (DIR): selects A→B or B→A
- Output enable (OE, active low): tri-states both sides when asserted
- True 3-state outputs on both buses
- Ioff protection for partial-power-down without back-powering
- Wide operating voltage: 1.65 V to 3.6 V (CMOS)
- High-speed CMOS with low static power
- ESD protection for robustness
- Packaging note: RSVR indicates Tape & Reel option
For exact electrical specs (drive, timing, etc.), refer to the TI datasheet.
Pinout
- Pin count: 20 pins (20-pin package, RSVR/tape-and-reel variant).
- Function: 4-bit bidirectional bus transceiver with 3-state outputs and bus-hold. It has A0–A3 and B0–B3 data lines, a direction input (DIR) that selects A↔B data flow, and an output-enable (OE) to tri-state the outputs.
- Function: 4-bit bidirectional bus transceiver with 3-state outputs and bus-hold. It has A0–A3 and B0–B3 data lines, a direction input (DIR) that selects A↔B data flow, and an output-enable (OE) to tri-state the outputs.
Manufacturer
- Manufacturer: Texas Instruments (TI).
- What kind of company: An American multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits, and is one of the world’s leading semiconductor suppliers.
- What kind of company: An American multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits, and is one of the world’s leading semiconductor suppliers.
Application
SN74AXCH4T245RSVR is a 4-bit bidirectional bus transceiver with tri-state outputs (DIR and OE control). Common application areas:
- Bidirectional buffering and isolation of data buses between devices (MCUs, microprocessors, DSPs, FPGAs) and memories/peripherals.
- Voltage-domain level shifting between different logic levels (e.g., 1.65–3.3V and 5V) for safe data transfer.
- Interfacing within microprocessor/microcontroller systems and peripheral I/O.
- Inter-board or backplane data-path buffering in embedded, automotive, and industrial applications.
- General-purpose, high-speed digital signal buffering where bus contention must be avoided.
- Bidirectional buffering and isolation of data buses between devices (MCUs, microprocessors, DSPs, FPGAs) and memories/peripherals.
- Voltage-domain level shifting between different logic levels (e.g., 1.65–3.3V and 5V) for safe data transfer.
- Interfacing within microprocessor/microcontroller systems and peripheral I/O.
- Inter-board or backplane data-path buffering in embedded, automotive, and industrial applications.
- General-purpose, high-speed digital signal buffering where bus contention must be avoided.
Package
20-pin TSSOP (Thin Shrink Small Outline) package.
