TS556_08 Datasheet, PDF (1/19 Pages) STMicroelectronics – Low-power dual CMOS timer

Features
■ Very low power consumption:
220 µA typ at V_CC = 5 V
180 µA typ at V_CC = 3 V
■ High maximum astable frequency 2.7 MHz
■ Pin-to-pin and functionally compatible with
bipolar NE556
■ Wide voltage range: 2 V to 16 V
■ Supply current spikes reduced during output
transitions
■ High input impedance: 10¹² Ω
■ Output compatible with TTL, CMOS and logic
MOS
Description
The TS556 is a dual CMOS timer which offers a
very low consumption:
(I_cc(TYP) TS556 = 220 µA at V_CC = +5 V versus
I_cc(TYP) NE556 = 6 mA),
and high frequency:
(f_(max.) TS556 = 2.7 MHz versus
f_(max.) NE556 = 0.1 MHz).
In both monostable and astable modes, timing
remains very accurate.
The TS556 provides reduced supply current
spikes during output transitions, which enable the
use of lower decoupling capacitors compared to
those required by bipolar NE556.
Due to the high input impedance (10¹²Î©), timing
capacitors can also be minimized.
TS556
Low-power dual CMOS timer
N
DIP14
(Plastic package)
D
SO14
(Plastic micropackage)
Pin connections
(top view)
Discharge 1
Threshold 2
Control
Voltage
3
Reset 4
Output 5
Trigger 6
GND 7
14 +V_S
13 Discharge
12 Threshold
11
Control
Voltage
10 Reset
9 Output
8 Trigger
October 2008
Rev 2
1/19
www.st.com
19