pcf2120 NXP Semiconductors, pcf2120 Datasheet - Page 6

• Manufacturer Part Number: pcf2120
• Description: Quartz Oscillator
• Manufacturer: NXP Semiconductors

NXP Semiconductors
[2]
12. Dynamic characteristics
Table 6.
V
otherwise specified.
[1]
PCF2120_1
Product data sheet
Symbol
Oscillator
C
DD
Fig 6. Supply current as a function of supply voltage
f
L(itg)
osc
Pin CLKOUT is loaded with a 7.5 pF capacitor.
When pin CLKOUT is enabled the current consumption is a function of the load on that pin, the output frequency and the supply voltage.
The additional current consumption for a given load can be calculated from the formula I
Where:
I
C
V
f
= 1.5 V to 5.5 V; V
DD
CLKOUT
/f
( A)
I
DD
a. CLKOUT disabled
CLKOUT
DD
osc
C
1.0
0.8
0.6
0.4
0.2
= supply current
= supply voltage
L(itg)
0
0
T
= output frequency on pin CLKOUT
amb
Dynamic characteristics
= capacitance on pin CLKOUT
is the combined equivalent integrated oscillator input and output capacitances.
Parameter
integrated load capacitance
relative oscillator frequency variation
= 25 C.
SS
2
= 0 V; T
amb
4
= 40 C to +85 C; f
V
DD
001aaf635
(V)
Rev. 01 — 5 February 2008
6
Conditions
V
DD
osc
= 200 mV; T
= 32.768 kHz; quartz R
( A)
I
b. CLKOUT enabled at 32 kHz
DD
2.0
1.6
1.2
0.8
0.4
0
amb
0
T
amb
= 25 C
= 25 C.
DD
s
= C
2
[1]
= 40 k and C
CLKOUT
Min
6
-
V
DD
Typ
8
0.2
4
L
f
= 8 pF; unless
CLKOUT
PCF2120
V
© NXP B.V. 2008. All rights reserved.
Quartz oscillator
DD
001aaf636
Max
10
-
(V)
6
Unit
pF
ppm
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