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SN74HC541N
SN74HC541N belongs to TI high‑speed HC‑CMOS logic family, packaged in PDIP‑20 through‑hole form. It integrates eight non‑inverting buffer channels with three‑state outputs.
Two active‑low enable pins OE1 and OE2 control output status. Only when both pins are low, input signals pass to output; any pin high will set all outputs to high‑impedance status, preventing bus conflict. It works from 2V‑6V power supply, features fast 10ns typical propagation delay and low quiescent current.
Inputs and outputs locate on opposite sides of chip, making PCB signal routing much easier. Main applications include microcontroller bus driver, digital signal buffering, level matching, industrial control board and electronic experimental circuits. Add power‑supply decoupling capacitor near VCC pin during hardware design. Datasheet PDF can be downloaded.
8‑channel non‑inverting octal buffer / line driver with 3‑state outputs
Wide supply voltage range: 2.0V ~ 6.0V, compatible with 3.3V and 5V logic systems
Two independent output‑enable pins (OE1, OE2); outputs enter high‑impedance state when any enable pin is high
±6mA output drive capability at 5V, can drive up to 15 LSTTL loads directly
Typical propagation delay tpd = 10ns, high‑speed CMOS performance
Low maximum input current: 1μA; low quiescent current ICC max 80μA
Flow‑through pinout: inputs and outputs on opposite sides of PDIP‑20 package, simplify PCB layout
Built‑in input clamp diodes for over‑voltage input protection
High noise immunity, good latch‑up resistance
Through‑hole PDIP‑20 package for manual assembly and breadboard prototyping
Industrial operating temperature: ‑40°C ~ +85°C
Item | Specifications |
|---|---|
Part Number | SN74HC541N |
Device Type | Octal Non‑Inverting 3‑State Buffer / Line Driver |
Manufacturer | Texas Instruments |
Number of Channels | 8 |
Output Logic | Non‑Inverting, 3‑State High‑Z |
Supply Voltage(Vcc) | 2.0V ~ 6.0V |
Output Drive Current | ±6mA @5V |
Typical Propagation Delay | 10ns |
Max Input Current | 1μA |
Max Quiescent Current(Icc) | 80μA |
Enable Control | Dual OE1, OE2 high active for high‑impedance |
Mounting Type | Through‑Hole |
Package / Case | PDIP‑20 |
Operating Temperature Range | -40°C ~ +85°C |
Storage Temperature | -55°C ~ +125°C |
Special Features | Flow‑through pin layout, input clamp diodes, bus‑oriented driver |
Microcontroller Bus Interface Expansion
Isolation and driving for MCU data bus and address bus; multiple chips share one system bus via 3‑state high‑impedance function.
Industrial Control Signal Buffering
Signal isolation for PLC peripheral I/O ports, protects main controller from external circuit interference.
Embedded System Memory Interface
Buffer driver for SRAM, ROM peripheral memory modules, enhances signal integrity for long PCB traces.
Instrument & Measuring Equipment
Digital signal level matching and line driving in multi‑channel test instruments, stabilise signal transmission.
Printer & Peripheral Hardware
Parallel port signal buffering for industrial printers and legacy peripheral devices.
Prototype & Breadboard Development
PDIP through‑hole package ideal for laboratory prototype circuit building, logic level conversion experiment.
Digital Display Driving Circuit
Drive LED digital tube and indicator arrays, improve output driving capability for logic IO ports.
A1: SN74HC541N is TI PDIP‑20 through‑hole 8‑channel non‑inverting three‑state buffer chip, widely used for bus driving and signal isolation.
A2: SN74HC541 uses flow‑through pin arrangement (inputs on one side, outputs on opposite side); SN74HC244 interleaves input‑output pins. They are not pin‑to‑pin compatible.
A3: Both OE1 and OE2 must pull low; if either pin goes high, all 8 outputs enter high‑impedance state.
A4: Yes, support 2V‑6V supply, can be used for 3.3V logic system.
A5: No, SN74HC541N is PDIP‑20 through‑hole package; surface‑mount version is SN74HC541DW (SOIC‑20).
