사양
| 속성 | 가치 |
| Supplier | onsemi |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Series | 74VHCT |
| Part Status | Active |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| Output Type | 3-State |
| Current - Output High Low | 8mA, 8mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
개요
Description
74VHCT244AMTCX is a high‑speed, TTL‑compatible, non‑inverting octal buffer/line driver with tri‑state outputs. It contains two independent 4‑bit buffers (A1–A8 inputs to Y1–Y8 outputs) with separate active‑low enables (/G1, /G2). When the enables are low, inputs are passed to outputs; when high, outputs are high‑impedance. Supply is typically 4.5–5.5 V; inputs are TTL‑friendly (VIH ≈ 2.0 V min, VIL ≈ 0.8 V max at 5 V). Packaging is a standard surface‑mount 20‑pin device (the AMTCX code denotes package/style). Applications include buffering/data bus driving, level shifting between TTL/CMOS domains, and isolating devices on microprocessor/memory interfaces. Pinout roughly includes VCC, GND, A1–A8, Y1–Y8, G1, G2. Always consult the specific datasheet for exact electrical specs and package details.
Equivalent
Equivalent parts (octal buffer/line driver with 3-state outputs) include:
- 74HCT244 (TTL-compatible inputs)
- SN74VHCT244 (TI)
- 74VHC244 (Very High Speed CMOS, TTL-compatible inputs; available from several vendors)
These have the same function; check the exact Vcc range and packaging (AMTCX) when cross-referencing.
- 74HCT244 (TTL-compatible inputs)
- SN74VHCT244 (TI)
- 74VHC244 (Very High Speed CMOS, TTL-compatible inputs; available from several vendors)
These have the same function; check the exact Vcc range and packaging (AMTCX) when cross-referencing.
Features
Key features of 74VHCT244AMTCX:
- Octal buffer/line driver with 3-state outputs (8 bits total)
- Two independent 4-bit sections with separate active-low enables (/G1, /G2)
- Very High-Speed CMOS with TTL input compatibility (VHCT)
- Operating supply: 4.5V to 5.5V (typical 5V)
- Low static and dynamic power consumption
- Output enable provides high-impedance state for bus sharing
- Pin-compatible with other 74xx244 devices; available in AMTCX package
- Suitable for wide temperature ranges (industrial/extended range variants)
- Octal buffer/line driver with 3-state outputs (8 bits total)
- Two independent 4-bit sections with separate active-low enables (/G1, /G2)
- Very High-Speed CMOS with TTL input compatibility (VHCT)
- Operating supply: 4.5V to 5.5V (typical 5V)
- Low static and dynamic power consumption
- Output enable provides high-impedance state for bus sharing
- Pin-compatible with other 74xx244 devices; available in AMTCX package
- Suitable for wide temperature ranges (industrial/extended range variants)
Pinout
- Pin count: 20 pins (DIP-20 / SO-20).
- Function: Octal buffer/line driver with 3-state outputs. Eight data inputs (A1–A8) drive eight outputs (Y1–Y8); two separate enable inputs (G1 and G2) are active-low to enable/disable groups of four buffers; VHCT means high-speed CMOS with TTL-compatible thresholds.
- Function: Octal buffer/line driver with 3-state outputs. Eight data inputs (A1–A8) drive eight outputs (Y1–Y8); two separate enable inputs (G1 and G2) are active-low to enable/disable groups of four buffers; VHCT means high-speed CMOS with TTL-compatible thresholds.
Manufacturer
Manufacturer: NXP Semiconductors (formerly Philips Semiconductor).
What kind of company: A Dutch multinational semiconductor company that designs and manufactures integrated circuits and embedded processing solutions for automotive, industrial, communication, and consumer electronics.
What kind of company: A Dutch multinational semiconductor company that designs and manufactures integrated circuits and embedded processing solutions for automotive, industrial, communication, and consumer electronics.
Application
74VHCT244AMTCX is an 8-bit, non-inverting buffer/line driver with 3-state outputs. Applications:
- 8-bit data/address buffering in microprocessor/memory systems
- Bus interfacing between TTL/LS devices and CMOS logic (TTL-compatible inputs)
- Tri-state buffering for bus sharing, multiplexing, and device enable control
- Signal conditioning and driving strength enhancement (fan-out) on digital backplanes
- General-purpose high-speed buffering in mixed-voltage digital systems
- 8-bit data/address buffering in microprocessor/memory systems
- Bus interfacing between TTL/LS devices and CMOS logic (TTL-compatible inputs)
- Tri-state buffering for bus sharing, multiplexing, and device enable control
- Signal conditioning and driving strength enhancement (fan-out) on digital backplanes
- General-purpose high-speed buffering in mixed-voltage digital systems
Package
It comes in a 20‑pin Small Outline Integrated Circuit (SOIC) package.
