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SA556

Description
Dual timer
File Size54KB,5 Pages
ManufacturerPhilips Semiconductors (NXP Semiconductors N.V.)
Websitehttps://www.nxp.com/
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SA556 Overview

Dual timer

Philips Semiconductors Linear Products
Product specification
Dual timer
NE/SA/SE556/NE556-1
DESCRIPTION
Both the 556 and 556-1 Dual Monolithic timing circuits are highly
stable controllers capable of producing accurate time delays or
oscillation. The 556 and 556-1 are a dual 555. Timing is provided by
an external resistor and capacitor for each timing function. The two
timers operate independently of each other, sharing only V
CC
and
ground. The circuits may be triggered and reset on falling
waveforms. The output structures may sink or source 200mA.
PIN CONFIGURATION
D, F, N Packages
DISCHARGE
THRESHOLD
CONTROL VOLTAGE
RESET
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
CC
DISCHARGE
THRESHOLD
CONTROL VOLTAGE
RESET
OUTPUT
TRIGGER
FEATURES
Turn-off time less than 2µs (556-1)
Maximum operating frequency >500kHz (556-1)
Timing from microseconds to hours
Replaces two 555 timers
Operates in both astable and monostable modes
High output current
Adjustable duty cycle
TTL compatible
Temperature stability of 0.005%/°C
SE556-1 compliant to MIL-STD or JAN
APPLICATIONS
OUTPUT
TRIGGER
GND
Precision timing
Sequential timing
Pulse shaping
Pulse generator
Missing pulse detector
Tone burst generator
Pulse width modulation
Time delay generator
Frequency division
Touch-Tone®encoder
Industrial controls
Pulse position modulation
Appliance timing
Traffic light control
BLOCK DIAGRAM
1
DISCHARGE
2
COMP
CONTROL VOLTAGE
RESET
3
4
COMP
11
10
RESET
CONTROL VOLTAGE
14
13
V
CC
DISCHARGE
THRESHOLD
12
THRESHOLD
FLIP FLOP
FLIP FLOP
OUTPUT
5
9
OUTPUT
TRIGGER
6
COMP
COMP
8
TRIGGER
GROUND
®
Touch-Tone
7
is a registered trademark of AT&T
August 31, 1994
353
853-0035 13721

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SA556 SE556F SE556 SA556N NE556D NE556F NE556-1 NE556
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