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Номер произв CSS555C
Описание Micropower Timer
Производители Custom Silicon Solutions
логотип Custom Silicon Solutions логотип 



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CSS555C Даташит, Описание, Даташиты
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Custom Silicon Solutions, Inc.
CSS555C
Micropower Timer (with Internal Timing Capacitor)
GENERAL PART DESCRIPTION
The CSS555C is a micropower version of the popular 555 timer IC. It features an operating current
under 5µA and a minimum supply voltage of 1.2V, making it ideal for battery-operated applications. A
six-decade programmable counter is included to allow generation of long timing delays. Configuration
data for the counter is held in EEPROM to maintain the standard pin count of eight. The analog circuits
are temperature compensated to provide excellent stability over a wide ambient temperature range. A
simple four-wire interface provides Read/Write access to the EEPROM. The CSS555C device includes
an internal precision timing capacitor (CTI). Its value is trimmed to 100pF ±1%.
Key Features
Lowest power 555 timer (by > 10X)!
Active mode current < 5 µA
Wide operating range
Wide supply range: 1.2V to 5.5V
Temperature range: -40°C to +85°C
Internal 6 decade, programmable counter
Settings = 1, 10, 102, 103, 104, 105 & 106
Multiplies delay time by up to 106
Delay times from microseconds to days
Internal 100pF, ±1% Timing Capacitor
User adjustable, 0.2pF resolution
Pin-for-pin compatible with 555 series timers
Monostable or Astable operation
Extremely low transient switching current
“Break-Before-Make” output driver
Temperature stability – 0.005% per °C
Applications
Portable & Battery-Powered Systems
Precision Timing & Pulse Generation
Ultra Long Period Delay Generation
Single Cell Battery Applications
Ultra Low Power Timers
Pulse Width Modulation
Low Cost, High Reliability Applications
Pin Configuration
GND
TRIGGER
OUTPUT
RESET
1
2
3
4
8 V+
7 DISCHARGE
6 THRESHOLD
5 CONTROL V
PDIP or SOIC
Figure 1
Typical Application Circuit
Long Period Delay Generator
Trigger
Output
Reset
18
27
36
45
VDD
RA
RB
Operating conditions:
RA = RB = 4.7M,
Internal counter = 106 (maximum)
CINT = 100pF, Delay = 16.3 minutes
Average power = 7.5 µW at VDD = 3.0V
Figure 2
Ordering Information
Part Number Package Description
CSS555C-ID
8 pin plastic DIP
CSS555C-IS
8 pin plastic SOIC
See page 9 for more details and options.
Custom Silicon Solutions Inc.
17951 Sky Park Circle, Suite F
Irvine, CA 92614
(949) 797-9220 • FAX: (949) 797-9225 • www.CustomSiliconSolutions.com
Custom Silicon Solutions, Inc. ©2009
1
Version 1.1, May 2009









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CSS555C Даташит, Описание, Даташиты
CSS555C
Micropower Timer (with Internal Timing Capacitor)
Block Diagrams
Control Voltage 5
Threshold 6
Trigger 2
Standard 555 Timer Configuration (Std. Mode)
(Programmable counter bypassed, Divider setting = 1)
CTI
100pF
VDD
8
R1+R2+R3 ~ 6 M
R1 For VDD > 1.8V, VH = 2/3 x VDD, VL = 1/3 x VDD
For VDD < 1.8V, VH = 0.9 x VDD, VL = 0.1 x VDD
VH _
Comp
+
R2
_
VL Comp
+
RQ
Flip
Flop
SQ
Reset
3 Output
7 Discharge
R3
1
VSS
4
Reset
Figure 3
Extended Period Configuration (EP Mode)
(Programmable counter enabled, Divider setting 10)
VDD
8
Control Voltage 5
Threshold 6
CTI
100pF
R1
VH _
Comp
+
R2
_
VL Comp
+
Configuration
EEPROM
RQ
Flip
Flop
SQ
Reset
Clk Mode Run
Mode
Control
Q
Reset Trig
Enbl Sel
6 Decade
Counter
Clk
Reset
Q
R3
1 42
VSS
Reset
Trigger
Sel
In0
Out
In1
2:1 Mux
3 Output
7 Discharge
EEPROM Bit Assignments
Figure 4
Counter
Configuration
xxxxx000
xxxxx001
xxxxx010
xxxxx011
xxxxx100
xxxxx101
xxxxx110
xxxxx111
Divider Setting
(Mult)
1 (Std. 555)
10
100
1K
10K
100K
1M
1 (Std. 555)
Table 1A
Mode
Control Bits
xxxx0xxx
xxxx1xxx
xxx0xxxx
xxx1xxxx
xx0xxxxx
xx1xxxxx
Bit 6
Bit 7
Function
Astable Mode (“Don’t Care” if Std. 555)
Monostable Mode (“Don’t Care” if Std. 555)
Micro Power
Low Power
Standard Voltage (Trip levels = & VDD)
Low Voltage (Trip levels = 10% & 90% VDD)
Unused
1 (Read Only)
Table 1B
Note: For detailed programming information, see Application Note AN555-1 (CSS555_App_Note1_Serial_Interface)
Custom Silicon Solutions, Inc. ©2009
2
Version 1.1, May 2009









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CSS555C Даташит, Описание, Даташиты
CSS555C
Micropower Timer (with Internal Timing Capacitor)
ELECTRICAL SPECIFICATIONS
Absolute Maximum Ratings
Supply Voltage (VDD)
Voltage at any Pin
Total Current into VDD Pin (Source)
Total Current out of GND Pin (Sink)
Storage Temperature Range
6V
-0.3 to VDD +0.3V
50 mA
60 mA
-65°C to +140°C
Note: Absolute maximum ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications
are not ensured when operating the device at absolute maximum ratings.
Electrical Characteristics
Temperature = 25°C, Test Circuit #1, unless otherwi se specified
(If VDD < 1.8V, “Low Voltage” mode must be selected to provide adequate comparator input levels. EE Bit5 = 1)
Parameter
Symbol Conditions
Min Typ Max Units
Supply Range
VDD
Standard VDD (EE Bit 5 = 0)
Low VDD (EE Bit 5 = 1)
1.8
1.2
5.5 V
5.5 V
Supply Current
(No DC load on OUTPUT pin, RL = )
IDD VDD = 1.5V
VDD = 3.0V
VDD = 5.0V
2.2 4.0 µA
3.1 6.0 µA
4.3 8.0 µA
Timing Accuracy
(Micro power setting, EE Bit 4 = 0)
(Monostable & Astable Modes)
Timing Drift with Temperature
(Monostable & Astable Modes)
Timing Shift with Supply Voltage
(Monostable & Astable Modes)
Maximum Oscillator Frequency
Control Voltage
TAVDD
TDTEMP
TSVDD
fMAX
VCTRL
RA(B) = 1M, CT = 0.001µF
VDD = 1.5V
VDD = 3.0V
VDD = 5.0V
RA(B) = 1M, CT = 0.001µF
VDD = 1.5V
VDD = 3.0V
VDD = 5.0V
RA(B) = 1M, CT = 0.001µF
VDD = 1.5V
VDD = 3.0V
VDD = 5.0V
RA,B = 4.7K, CTI = 100 pF
Standard VDD (EE Bit 5 = 0)
Low VDD (EE Bit 5 = 1)
64
88
1.0
1.0
1.0
45
35
35
0.10
0.15
0.15
1
67
90
2.0 %
2.0 %
2.0 %
ppm/°C
ppm/°C
ppm/°C
%/V
%/V
%/V
MHz
70 % V
92 % V
Trigger Voltage
VTRIG Standard VDD (EE Bit 5 = 0)
30
33
36 % V
Low VDD (EE Bit 5 = 1)
8 10 12 % V
Reset Voltage
Output Voltage
(Timer Output Pin)
Discharge Saturation Voltage
(Discharge Output Pin)
Input Current
(Trigger, Reset & Threshold Inputs)
Discharge Leakage Current
Output Rise & Fall Times
Input Capacitance
Internal Timing Capacitor (NPO)
VRST
VOL
VOH
VDIS
IIN
IDIS
tR, tF
CIN
CTI
VDD = 1.5V, ISINK = 1 mA
VDD = 3.0V, ISINK = 4 mA
VDD = 5.0V, ISINK = 10 mA
VDD = 1.5V, ISOURCE = 1 mA
VDD = 3.0V, ISOURCE = 4 mA
VDD = 5.0V, ISOURCE = 10 mA
VDD = 1.5V, ISINK = 2.5 mA
VDD = 3.0V, ISINK = 10 mA
VDD = 5.0V, ISINK = 25 mA
VDD = 5.5V
VIN = 0.0V to 5.5V
VDD = 5.5V
VDD = 3.0V, CL = 10 pF
Trim Resolution = 0.2pF
0.3 x VDD
1.35
2.75
4.50
0.5 x VDD
0.07
0.16
0.31
1.40
2.85
4.73
0.07
0.18
0.36
10
0.7 x VDD
0.15
0.25
0.50
0.15
0.25
0.50
1 100
5
10
99 100 101
V
V
V
V
V
V
V
V
V
V
pA
nA
ns
pF
pF
Table 2
Custom Silicon Solutions, Inc. ©2009
3
Version 1.1, May 2009










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