Datenblatt-pdf.com


ZSCT1555 Schematic ( PDF Datasheet ) - Zetex Semiconductors

Teilenummer ZSCT1555
Beschreibung PRECISION SINGLE CELL TIMER
Hersteller Zetex Semiconductors
Logo Zetex Semiconductors Logo 




Gesamt 10 Seiten
ZSCT1555 Datasheet, Funktion
PRECISION SINGLE CELL TIMER
ZSCT1555
ISSUE 2 - MAY 1998
DEVICE DESCRIPTION
These devices are precision timing circuits for
generation of accurate time delays or
oscillation. Advanced circuit design means that
these devices can operate from a single battery
cell with the minimum of quiescent current.
In monostable mode time delays are
controlled by a single resistor and capacitor
network. In astable mode the frequency and
duty cycle can be accurately and
independently controlled with two external
resistors and one capacitor.
The threshold and trigger levels are normally
set as a proportion of VCC by internal resistors.
These levels can be programmed by the use
of the control input pin.
When the trigger input reduces to a value
below the trigger level, the flip-flop is set and
the output goes high. With the trigger input
above the trigger level and the threshold input
above the threshold level, the flip-flop is reset
SCHEMATIC DIAGRAM
8
VCC
and the output goes low. The reset pin has
priority over all the other inputs and is used
to start new timing cycles. A low on the reset
input causes the flip-flop to reset forcing the
output low. Whenever the output is forced
low then the internal discharge transistor is
turned on.
FEATURES
0.9V supply operating voltage guaranteed
Pin connections comparable with 555
series timers
Very low quiescent current 74 µA
SO8 and DIL8 packages
Operating temperature range
compatible with battery technologies
APPLICATIONS
Portable and battery powered
equipment
Low voltage and low power systems
CONTROL
5
6
THRESH
2
TRIGGER
7
DISCHARGE
4
RESET
4-311
3
OUTPUT
1
GND






ZSCT1555 Datasheet, Funktion
ZSCT1555
FUNCTIONAL DIAGRAM
FUNCTIONAL TABLE
RESET
Low
High
High
High
TRIGGER VALUE THRESHOLD
VOLTAGE
N/A N/A
<VCC/5
>VCC/5
>VCC/5
N/A
>4VCC/5
<4VCC/5
OUTPUT
DISCHARGE
SWITCH
Low
On
High
Off
Low
On
As Previously established
POWER DERATING TABLE
Package TA25°C
Derating Factor
Power Rating Above TA=25°C
N8 625mW
6.25mW/°C
D8 625mW
6.25mW/°C
TA=70°C Power
Rating
330mW
330mW
TA=85°C Power
Rating
250mW
250mW
4-316

6 Page







SeitenGesamt 10 Seiten
PDF Download[ ZSCT1555 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
ZSCT1555PRECISION SINGLE CELL TIMERZetex Semiconductors
Zetex Semiconductors
ZSCT1555D8PRECISION SINGLE CELL TIMERZetex Semiconductors
Zetex Semiconductors
ZSCT1555N8PRECISION SINGLE CELL TIMERZetex Semiconductors
Zetex Semiconductors

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche