Thông số kỹ thuật
| thuộc tính | Giá trị |
| Supplier | Texas Instruments |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Series | 74LVC |
| Part Status | Active |
| Logic Type | Buffer, Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| Output Type | 3-State |
| Current - Output High Low | 24mA, 24mA |
| Voltage - Supply | 1.65V ~ 3.6V |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount |
Tổng quan
Description
The SN74LVC240APWR is an 8‑bit, non‑inverting buffer/line driver with two 4‑bit banks and 3‑state outputs. Inputs A0–A7 feed outputs Y0–Y7; each bank is enabled by its own output-enable pin (OE1 for Y0–Y3, OE2 for Y4–Y7). When an OE is asserted, the corresponding outputs follow inputs; when deasserted, those outputs are high impedance, allowing bus sharing. It’s part of TI’s LVC family and operates from a single 1.65–3.6 V supply with CMOS/TTL-compatible inputs. Typical uses include buffering and level-shifting signals between microcontrollers, memories, and peripherals, or isolating buses in multi-device systems. Packaging is the Pb‑free, RoHS-compliant 20‑pin version (APWR suffix) in standard TI small-outline packages. For exact drive strength, propagation delay, and available packages, see the data sheet.
Equivalent
Equivalent parts (octal buffer/line driver with 3-state outputs, LVC family):
- Nexperia: 74LVC240A
- On Semiconductor: MC74LVC240A
- Renesas: uPD74LVC240A
- Diodes Incorporated: ALVC240A
Note: these are functionally the same device in other vendors’ naming; pick the one with matching voltage range, speed grade, and package (e.g., APWR).
- Nexperia: 74LVC240A
- On Semiconductor: MC74LVC240A
- Renesas: uPD74LVC240A
- Diodes Incorporated: ALVC240A
Note: these are functionally the same device in other vendors’ naming; pick the one with matching voltage range, speed grade, and package (e.g., APWR).
Features
SN74LVC240APWR features:
- Octal (8-bit) non-inverting buffer/driver with 3-state outputs
- Two independent 4-bit buffers (groups) with separate output-enable controls
- High-speed CMOS logic and low static/dynamic power
- Wide supply voltage: 1.65 V to 3.6 V (LVC family)
- Ioff support for partial-power-down protection
- Outputs go to high impedance when disabled, allowing bus sharing
- Suitable for driving data/address buses and high-speed signaling
- Pb-free, RoHS-compliant APWR package (high-density small footprint)
- Temperature range: suitable for -40°C to 125°C operation
Note: OE polarity is as per datasheet (allows tri-state when inactive).
- Octal (8-bit) non-inverting buffer/driver with 3-state outputs
- Two independent 4-bit buffers (groups) with separate output-enable controls
- High-speed CMOS logic and low static/dynamic power
- Wide supply voltage: 1.65 V to 3.6 V (LVC family)
- Ioff support for partial-power-down protection
- Outputs go to high impedance when disabled, allowing bus sharing
- Suitable for driving data/address buses and high-speed signaling
- Pb-free, RoHS-compliant APWR package (high-density small footprint)
- Temperature range: suitable for -40°C to 125°C operation
Note: OE polarity is as per datasheet (allows tri-state when inactive).
Pinout
Pin count: 20 pins.
Function: SN74LVC240APWR is an octal buffer/line driver with 3-state outputs. It provides eight non-inverting buffers (A1–A8 to Y1–Y8) with two active-low output-enable inputs (OE1 and OE2). When enables are low, outputs follow inputs; when high, outputs are high-impedance. Suitable for low-voltage CMOS operation (Vcc 1.65–3.6 V).
Function: SN74LVC240APWR is an octal buffer/line driver with 3-state outputs. It provides eight non-inverting buffers (A1–A8 to Y1–Y8) with two active-low output-enable inputs (OE1 and OE2). When enables are low, outputs follow inputs; when high, outputs are high-impedance. Suitable for low-voltage CMOS operation (Vcc 1.65–3.6 V).
Manufacturer
- Manufacturer: Texas Instruments (TI).
- What kind of company: An American multinational semiconductor company that designs and manufactures integrated circuits (ICs), including analog, digital, and mixed-signal ICs for electronics.
- What kind of company: An American multinational semiconductor company that designs and manufactures integrated circuits (ICs), including analog, digital, and mixed-signal ICs for electronics.
Application
SN74LVC240APWR is an 8-bit buffer/line driver with 3-state outputs (OE). Typical applications:
- Buffering/busing between microprocessors/MCUs, memory, and peripherals.
- Bus sharing with tri-state control to prevent contention.
- Level shifting/interface between different logic-voltage domains (e.g., 1.65–3.3 V).
- Signal integrity and fan-out reduction on data/address lines and backplanes.
- High-speed I/O buffering where clean edges and controlled drive are needed.
It’s suited for general-purpose data buffering and bus-driving in mixed-voltage digital systems.
- Buffering/busing between microprocessors/MCUs, memory, and peripherals.
- Bus sharing with tri-state control to prevent contention.
- Level shifting/interface between different logic-voltage domains (e.g., 1.65–3.3 V).
- Signal integrity and fan-out reduction on data/address lines and backplanes.
- High-speed I/O buffering where clean edges and controlled drive are needed.
It’s suited for general-purpose data buffering and bus-driving in mixed-voltage digital systems.
Package
Package: 20-pin TSSOP (PWR suffix), RoHS-compliant.
