Advanced Linear Devices ALD555PAL-Programmable Timers and Oscillators

ALD555PAL Description

Made by Advanced Linear Devices, Inc, the ALD555PAL is a programmable timer that can be used in a wide range of applications, including precision timing, pulse shaping, frequency division, and duty cycle control. It has a typical timing accuracy of ±0.1%, and can be programmed to operate in a variety of modes, including monostable, astable, or bistable modes.

 

The ALD555 timer is a high performance monolithic timing circuit built with advanced silicon gate CMOS technology. It offers the benefits of high input impedance, thereby allowing smaller timing capacitors and longer timing cycle; high speed, with typical cycle time of 500ns; low power dissipation for battery operated environment; reduced supply current spikes, allowing smaller and lower cost decoupling capacitors. It is capable of producing accurate time delays and oscillations in both monostable and astable operation. It operates in the one-shot (monostable) mode or 50% duty cycle free running oscillation mode with a single resistor and one capacitor. The inputs and outputs are fully compatible with CMOS, NMOS or TTL logic.

 

ALD555PAL Application

High speed one-shot (monostable) pulse generation

Precision timing

Sequential timing

Long delay timer

Pulse width and pulse position modulation

Missing pulse detector

Frequency divider

 

ALD555PAL Pin Configuration

 

 

There are three matched internal resistors (approximately 200KΩeach) that set the threshold and trigger levels at two-thirds and one third respectively of V+.

These levels can be adjusted by using the control terminal. When the trigger input is below the trigger level, the output is in the high state and sourcing 2mA. When threshold input is above the threshold level at the same time the trigger input is above the trigger level, the internal flip-flop is reset, the output goes to the low state and sinks up to 10mA. The reset input overrides all other inputs and when it is active (reset voltage less than 1V), the output is in the low state.

ALD555PAL Block Diagram

ALD555PAL Features

Functional equivalent to NE555 with greatly expanded high and low frequency ranges

High speed, low power, monolithic CMOS technology

Low supply current: 100µA typical

Extremely low trigger, threshold and reset currents:1pA typical

High speed operation -- 2MHz oscillation

Low operating supply voltage of 2 to 12V

Operates in both monostable and astable modes

Fixed 50% duty cycle or adjustable duty cycle

CMOS, NMOS and TTL compatible input/output

High discharge sinking current of 80mA

Low supply current spikes

 

ALD555PAL Absolute Maximum Rating

Supply voltage: V+ 13.2V

Input voltage range: 0.3V to V+ +0.3V

Power dissipation: 600 mW

Operating temperature range SAL, PAL packages: 0°C to + 70°C; DA package -55°C to +125°C

Storage temperature range: -65°C to +150°C

Lead temperature, 10 seconds: +260°C

 

ALD555PAL 8 Pin Plastic SOIC Package

ALD555PAL Product Parameter

Manufacturer	Advanced Linear Devices, Inc.	Manufacturer's Part	ALD555PAL
Categories	Integrated Circuits (ICs)	Sub-Categories	Clock/Timing - Programmable Timers and Oscillators
Series	-	Part Status	Active
Type	555 Type, Timer/Oscillator (Single)	Count	-
Frequency	2MHz	Voltage - Supply	2V ~ 12V
Current - Supply	100µA	Operating Temperature	0°C ~ 70°C
Package / Case	8-DIP (0.300", 7.62mm)	Supplier Device Package	8-PDIP
Mounting Type	Through Hole

 

ALD555PAL Manufacturer

Advanced Linear Devices, Inc specializes in the development, production and sales of precision low-power linear integrated circuits, which are used in industrial control, electronic equipment, computers and peripheral equipment, medical equipment, automobiles, and telecommunication systems. In 1985, the company began to provide standard products and customized solutions for linear engineers with brand new CMOS technology.