TLC556, TLC556Y
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics, V
DD
= 5 V, T
A
= 25°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IT
Input threshold voltage 2.8 3.3 3.8 V
Threshold current 10 pA
V
(trigger)
Trigger voltage 1.36 1.66 1.96 V
I
(trigger)
Trigger current 10 pA
V
(reset)
Reset voltage 0.4 1.1 1.5 V
I
(reset)
Reset current 10 pA
Discharge switch on-state voltage I
OL
= 10 mA 0.15 0.5 V
Discharge switch off-state current 0.1 nA
V
OH
High-level output voltage I
OH
= –1 mA 4.1 4.8 V
I
OL
= 8 mA 0.21 0.4
V
OL
Low-level output voltage
I
OL
= 5 mA
0.13 0.3
V
I
OL
= 2.1 mA 0.08 0.3
I
DD
Supply current See Note 2 3.40 700 µA
NOTE 2: These values apply for the expected operating configurations in which THRES is connected directly to DISCH or TRIG.
operating characteristics, V
DD
= 5 V, T
A
= 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Initial error of timing interval
†
V
DD
= 5 V to 15 V, R
A
= R
B
= 1 kΩ to 100 kΩ 1% 3%
Supply voltage sensitivity of timing interval
C
T
= 0.1 µF, See Note 3 0.1 0.5 %/V
t
r
Output pulse rise time
p
20 75
t
f
Output pulse fall time
L
=
,
L
=
15 60
f
max
Maximum frequency in astable mode
R
A
= 470 Ω,
C
T
= 200 pF,
R
B
= 200 Ω,
See Note 3
1.2 2.1 MHz
†
Timing interval error is defined as the difference between the measured value and the average value of a random sample from each process
run.
NOTE 3: R
A
, R
B
, and C
T
are as defined in Figure 3.
