Custom Silicon Solutions, Inc. ©2009

3

Version 1.1, May 2009

CSS555C

Micropower Timer (with Internal Timing Capacitor)

ELECTRICAL SPECIFICATIONS

Absolute Maximum Ratings

Supply Voltage (VDD)

6V

Voltage at any Pin

-0.3 to VDD +0.3V

Total Current into VDD Pin (Source)

50 mA

Total Current out of GND Pin (Sink)

60 mA

Storage Temperature Range

-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

5.5

V

V

Supply Current

(No DC load on OUTPUT pin, RL = ∞)

IDD

VDD = 1.5V

VDD = 3.0V

VDD = 5.0V

2.2

3.1

4.3

4.0

6.0

8.0

µA

µA

µA

Timing Accuracy

(Micro power setting, EE Bit 4 = 0)

(Monostable & Astable Modes)

TAVDD

RA(B) = 1M , CT = 0.001

µF

VDD = 1.5V

VDD = 3.0V

VDD = 5.0V

1.0

1.0

1.0

2.0

2.0

2.0

%

%

%

Timing Drift with Temperature

(Monostable & Astable Modes)

TDTEMP

RA(B) = 1M , CT = 0.001

µF

VDD = 1.5V

VDD = 3.0V

VDD = 5.0V

45

35

35

ppm/°C

ppm/°C

ppm/°C

Timing Shift with Supply Voltage

(Monostable & Astable Modes)

TSVDD

RA(B) = 1M , CT = 0.001

µF

VDD = 1.5V

VDD = 3.0V

VDD = 5.0V

0.10

0.15

0.15

%/V

%/V

%/V

Maximum Oscillator Frequency

fMAX

RA,B = 4.7K , CTI = 100 pF

1

MHz

Control Voltage

VCTRL

Standard VDD (EE Bit 5 = 0)

Low VDD (EE Bit 5 = 1)

64

88

67

90

70

92

% V

% V

Trigger Voltage

VTRIG

Standard VDD (EE Bit 5 = 0)

Low VDD (EE Bit 5 = 1)

30

8

33

10

36

12

% V

% V

Reset Voltage

VRST

0.3 x VDD

0.5 x VDD

0.7 x VDD

V

Output Voltage

(Timer Output Pin)

VOL

VDD = 1.5V, ISINK = 1 mA

VDD = 3.0V, ISINK = 4 mA

VDD = 5.0V, ISINK = 10 mA

0.07

0.16

0.31

0.15

0.25

0.50

V

V

V

VOH

VDD = 1.5V, ISOURCE = 1 mA

VDD = 3.0V, ISOURCE = 4 mA

VDD = 5.0V, ISOURCE = 10 mA

1.35

2.75

4.50

1.40

2.85

4.73

V

V

V

Discharge Saturation Voltage

(Discharge Output Pin)

VDIS

VDD = 1.5V, ISINK = 2.5 mA

VDD = 3.0V, ISINK = 10 mA

VDD = 5.0V, ISINK = 25 mA

0.07

0.18

0.36

0.15

0.25

0.50

V

V

V

Input Current

(Trigger, Reset & Threshold Inputs)

IIN

VDD = 5.5V

VIN = 0.0V to 5.5V

10

pA

Discharge Leakage Current

IDIS

VDD = 5.5V

1

100

nA

Output Rise & Fall Times

tR, tF

VDD = 3.0V, CL = 10 pF

5

ns

Input Capacitance

CIN

10

pF

Internal Timing Capacitor (NPO)

CTI

Trim Resolution = 0.2pF

99

100

101

pF

Table 2