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Número de pieza D555
Descripción 112dB 192kHz 24-BIT SCH DAC
Fabricantes Advanced Linear Devices 
Logotipo Advanced Linear Devices Logotipo



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No Preview Available ! D555 Hoja de datos, Descripción, Manual

ADVANCED
LINEAR
DEVICES, INC.
HIGH SPEED CMOS TIMER
ALD555
GENERAL DESCRIPTION
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 (mono-
stable) 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.
There are three matched internal resistors (approximately 200Keach)
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 (pin 5). 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.
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 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 (80mA)
• Low supply current spikes
ORDERING INFORMATION
Operating Temperature Range *
-55°C to +125°C
0°C to +70°C
0°C to +70°C
8-Pin
CERDIP
Package
8-Pin
Small Outline
Package (SOIC)
8-Pin
Plastic Dip
Package
APPLICATIONS
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
PIN CONFIGURATION
GROUND 1
TRIGGER 2
OUTPUT 3
RESET 4
8 V+
7 DISCHARGE
6 THRESHOLD
5 CONTROL
TOP VIEW
DA, PA, SA PACKAGE
BLOCK DIAGRAM
V+
(8)
THRESHOLD
(6)
CONTROL
(5)
R
R
TRIGGER
(2)
R
GND
(1)
RESET
(4)
R
S
OUTPUT
(3)
DISCHARGE
(7)
ALD555 DA
ALD555 SA
* Contact factory for industrial temperature range
ALD555 PA
© 1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com

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