사양
| 속성 | 가치 |
| Supplier | Texas Instruments |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Series | 74ABT |
| 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 | 32mA, 64mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
개요
Description
SN74ABT244ANSR is an 8‑bit buffer/driver with 3‑state outputs from TI. It contains two 4‑bit buffers with independent output enables (1OE and 2OE). Inputs A0–A7 drive outputs Y0–Y7 when the corresponding OE is active (the enables are active‑low). If an OE is deasserted, the associated outputs go high impedance, allowing the device to share a bus or parallel data lines. Built on TI’s ABT (Advanced BiCMOS) technology, it offers fast, CMOS‑compatible inputs with TTL thresholds. Supply voltage is typically 4.5–5.5 V; input/output levels suit 5 V logic. Propagation delays are on the order of a few nanoseconds, varying with temperature and process. The NSR suffix indicates a 20‑pin narrow SOIC RoHS package. Applications include bus buffering, data buffering between microcontrollers and peripherals, and other digital buffering tasks needing tri‑state control.
Equivalent
Equivalent devices (octal buffer/driver with 3-state outputs):
- TI: SN74ABT244AN / SN74ABT244ANSR
- NXP/Onsemi: 74ABT244A / 74ABT244N
- Other families (similar function): 74ACT244 / 74HC244 / 74HCT244 / 74LS244
Note: verify input thresholds, timing, and pinout before substituting.
- TI: SN74ABT244AN / SN74ABT244ANSR
- NXP/Onsemi: 74ABT244A / 74ABT244N
- Other families (similar function): 74ACT244 / 74HC244 / 74HCT244 / 74LS244
Note: verify input thresholds, timing, and pinout before substituting.
Features
SN74ABT244ANSR is an octal buffer/driver with 3-state outputs. Key features:
- Two 4‑bit buffers with separate active-low enables (OE1, OE2)
- Non-inverting data path from A inputs to Y outputs
- Outputs go High‑Z when their enable is deasserted
- Ioff support for partial-power-down (no back-powering when Vcc = 0)
- Advanced BiCMOS (ABT) technology; TTL‑compatible inputs
- Wide operating supply: typically 2.0 V to 5.5 V
- Fast switching with low power consumption; standard ESD protection
Common use: buffering between logic families and driving busses.
- Two 4‑bit buffers with separate active-low enables (OE1, OE2)
- Non-inverting data path from A inputs to Y outputs
- Outputs go High‑Z when their enable is deasserted
- Ioff support for partial-power-down (no back-powering when Vcc = 0)
- Advanced BiCMOS (ABT) technology; TTL‑compatible inputs
- Wide operating supply: typically 2.0 V to 5.5 V
- Fast switching with low power consumption; standard ESD protection
Common use: buffering between logic families and driving busses.
Pinout
- Pin count: 20 pins (DIP-20/SO-20).
- Function: Octal buffer/line driver with 3-state outputs. It buffers A1–A8 to Y1–Y8 (non-inverting) with two enable inputs (G1 for Y1–Y4 and G2 for Y5–Y8) that tri-state the corresponding outputs.
- Function: Octal buffer/line driver with 3-state outputs. It buffers A1–A8 to Y1–Y8 (non-inverting) with two enable inputs (G1 for Y1–Y4 and G2 for Y5–Y8) that tri-state the corresponding outputs.
Manufacturer
The manufacturer is Texas Instruments Incorporated (TI). TI is an American multinational technology company that designs and manufactures semiconductors and integrated circuits, including analog and digital ICs.
Application
SN74ABT244ANSR is an 8-bit buffer/line driver with tri-state outputs. Common applications:
- 8-bit data/address bus buffering between a microprocessor/microcontroller and memory, I/O devices, ASICs, or FPGAs
- Bus isolation and fan-out expansion (two independent 4-bit sections with separate enable pins)
- Interface between different logic families or voltage domains in memory-mapped I/O or peripheral interfaces
- General-purpose, high-speed noninverting buffering for timing control and signal distribution in digital systems
- 8-bit data/address bus buffering between a microprocessor/microcontroller and memory, I/O devices, ASICs, or FPGAs
- Bus isolation and fan-out expansion (two independent 4-bit sections with separate enable pins)
- Interface between different logic families or voltage domains in memory-mapped I/O or peripheral interfaces
- General-purpose, high-speed noninverting buffering for timing control and signal distribution in digital systems
Package
20-pin Small Outline Integrated Circuit (SOIC) surface-mount package.
