ICM7555_06 Datasheet, PDF (4/12 Pages) Intersil Corporation – General Purpose Timers

ICM7555, ICM7556
Electrical Specifications Applies to ICM7555 and ICM7556, unless otherwise specified (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
T_A = +25°C
MIN TYP MAX
(NOTE 4)
-55°C TO +125°C
MIN TYP MAX
Reset Voltage
Reset Current
Discharge Leakage
Output Voltage
Discharge Output Voltage
Supply Voltage (Note 3)
Output Rise Time (Note 3)
Output Fall Time (Note 3)
Oscillator Frequency
(Note 3)
V_RST
I_RST
I_DIS
V_OL
V_OH
V_DIS
V_DD
t_R
t_F
f_MAX
V_DD = 2V to 15V
V_DD = 15V
V_DD = 15V
V_DD = 15V, I_SINK = 20mA
V_DD = 5V, I_SINK = 3.2mA
V_DD = 15V, I_SOURCE = 0.8mA
V_DD = 5V, I_SOURCE = 0.8mA
V_DD = 5V, I_SINK = 15mA
V_DD = 15V, I_SINK = 15mA
Functional Operation
R_L = 10M, C_L = 10pF, V_DD = 5V
R_L = 10M, C_L = 10pF, V_DD = 5V
V_DD = 5V, R_A = 470Ω, R_B = 270Ω,
C = 200pF
0.4
1.0 0.2
10
10
0.4 1.0
0.2 0.4
14.3 14.6
14.2
4.0 4.3
3.8
0.2 0.4
2.0
18.0 3.0
75
75
1
1.2
50
50
1.25
0.5
0.6
0.4
16.0
NOTES:
3. These parameters are based upon characterization data and are not tested.
4. Applies only to military temperature range product (M suffix).
UNITS
V
nA
nA
V
V
V
V
V
V
V
ns
ns
MHz
Functional Diagram
THRESHOLD
6
5
CONTROL
VOLTAGE
V_DD
8
4
R COMPARATOR
A
+
-
FLIP-FLOP
RESET
R
TRIGGER
2
+
-
R
COMPARATOR
B
1
GND
OUTPUT
DRIVERS
OUTPUT
3
7 DISCHARGE
n
1
NOTE: This functional diagram reduces the circuitry down to its simplest equivalent components. Tie down unused inputs.
TRUTH TABLE
THRESHOLD VOLTAGE
TRIGGER VOLTAGE
RESET
Don’t Care
Don’t Care
Low
>²/₃(V+)
<²/₃(V+)
Don’t Care
>¹/₃(V+)
>¹/₃(V+)
<¹/₃(V+)
High
High
High
NOTE: RESET will dominate all other inputs: TRIGGER will dominate over THRESHOLD.
OUTPUT
Low
Low
Stable
High
DISCHARGE SWITCH
On
On
Stable
Off
4
FN2867.9
August 24, 2006