SE555-SP Datasheet, PDF (1/18 Pages) Texas Instruments – QML CLASS V PRECISION TIMER

SE555-SP
www.ti.com
QML CLASS V PRECISION TIMER
Check for Samples: SE555-SP
SGLS401 – FEBRUARY 2010
FEATURES
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• Timing From Microseconds to Hours
• Astable or Monostable Operation
• Adjustable Duty Cycle
• TTL-Compatible Output Can Sink or Source up
to 100 mA
• QML-V Qualified, SMD 5962-98555
• Military Temperature Range (-55°C to 125°C)
• Rad-Tolerant: 25 kRad (Si) TID ⁽¹⁾
(1) Radiation tolerance is a typical value based upon initial device
qualification with dose rate = 10 mrad/sec. Radiation Lot
Acceptance Testing is available - contact factory for details.
JG PACKAGE
(TOP VIEW)
GND 1
TRIG 2
OUT 3
RESET 4
8
V
CC
7 DISCH
6 THRES
5 CONT
DESCRIPTION/ORDERING INFORMATION
The SE555 is a precision timing circuit capable of producing accurate time delays or oscillation. In the time-delay
or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor
network. In the astable mode of operation, the frequency and duty cycle can be controlled independently with two
external resistors and a single external capacitor.
The threshold and trigger levels normally are two-thirds and one-third, respectively, of V_CC. These levels can be
altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is
set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the
threshold level, the flip-flop is reset and the output is low. The reset (RESET) input can override all other inputs
and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset, and the output goes
low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground.
The output circuit is capable of sinking or sourcing current up to 100 mA. Operation is specified for supplies of
4.5 V to 16.5 V. With a 5-V supply, output levels are compatible with TTL inputs.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated