NE556 Datasheet, PDF (1/5 Pages) NXP Semiconductors – Dual timer

Philips Semiconductors Linear Products
Dual timer
Product specification
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.
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
• Precision timing
• Sequential timing
• Pulse shaping
BLOCK DIAGRAM
1
DISCHARGE
2
THRESHOLD
3
CONTROL VOLTAGE
RESET ⁴
5
OUTPUT
COMP
FLIP FLOP
PIN CONFIGURATION
D, F, N Packages
DISCHARGE ¹
THRESHOLD ²
CONTROL VOLTAGE ³
RESET ⁴
OUTPUT ⁵
TRIGGER ⁶
GND ⁷
14 _VCC
13 _DISCHARGE
12 _THRESHOLD
11 _{CONTROL VOLTAGE}
10 _RESET
9 OUTPUT
8 _TRIGGER
• 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
COMP
14 V_CC
13 _DISCHARGE
12
THRESHOLD
11
CONTROL VOLTAGE
10
RESET
FLIP FLOP
9
OUTPUT
6
TRIGGER
GROUND ⁷
®_{Touch-Tone is a registered trademark of AT&T}
COMP
COMP
8
TRIGGER
August 31, 1994
353
853-0035 13721