Datasheet

NE556, SA556, SE556
DUAL PRECISION TIMERS
SLFS023E – APRIL 1978 – REVISED OCTOBER 2000
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
(each timer)
RESET
TRIGGER
VOLTAGE
†
THRESHOLD
VOLTAGE
†
OUTPUT
DISCHARGE
SWITCH
Low Irrelevant Irrelevant Low On
High <1/3 V
DD
Irrelevant High Off
High >1/3 V
DD
>2/3 V
DD
Low On
High >1/3 V
DD
<2/3 V
DD
As previously established
†
Voltage levels shown are nominal.
functional block diagram, each timer
OUT
RESETV
CC
CONT
GND
DISCH
THRES
TRIG
RESET can override TRIG, which can override THRES.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
‡
Supply voltage, V
CC
(see Note 1) 18 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage (CONT, RESET, THRES, and TRIG) V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output current ±225 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
JA
(see Note 2): D package 86°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package 80°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: J package 300°C. . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or N package 260°C. . . . . . . . . . . . . . . .
Storage temperature range, T
stg
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‡
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values are with respect to network ground terminal.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
DISSIPATION RATING TABLE
PACKAGE
T
A
≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE T
A
= 25°C
T
A
= 70°C
POWER RATING
T
A
= 85°C
POWER RATING
T
A
= 125°C
POWER RATING
J 1375 mW 11.0 mW/°C 880 mW 715 mW 275 mW