pca2125 NXP Semiconductors, pca2125 Datasheet - Page 31

• Manufacturer Part Number: pca2125
• Description: Spi Real Time Clock / Calendar Semiconductors
• Manufacturer: NXP Semiconductors

NXP Semiconductors
[2]
[3]
9. Dynamic characteristics
Table 43.
V
valid within the operating supply voltage at ambient temperature and referenced to V
V
PCA2125_00
Preliminary data sheet
Symbol
Serial interface timing characteristics (SPI and serial interface, see
f
t
t
t
t
t
t
t
t
t
t
t
t
t
SCLK
SCLK
w(SCLKH)
w(SCLKL)
RF
CES
CEH
CER
WCE
DS
DH
RD
RZ
ZZ
DD1
SS
to V
Timer source clock =
Tested on sample basis.
= 1.6 to 5.5V; V
DD
.
Parameter
SCL clock
frequency
SCLK time
SCLK HIGH pulse
width
SCLK LOW pulse
width
SCLK rise and fall
time
CE setup time
CE hold time
CE recovery time
Pulse width CE
SDI setup time
SDI hold time
SDO read delay
time
SDO disable time
Bus conflict
avoidance time
Dynamic characteristics
SS
1
= 0 V; T
⁄
60
Hz, level of pins SCE, SDI and SCL is V
amb
Conditions
No load value. Bus will
be help up by bus
capacitance. Use RC
time constant with
application values.
=
−
40 to +125
Rev. 00.11 — 30 January 2007
°
C, f
CLKOUT
V
Min
-
530
200
200
-
30
100
100
-
20
100
-
-
0
DD
= 32.768 kHz unless otherwise specified. All timing values are
DD
= 1.6V
or V
Max
1.89
-
-
-
100
-
-
-
0.99
-
-
216
50
-
SS
.
Figure
V
Min
-
210
100
100
-
30
60
100
-
10
60
-
-
0
DD
= 2.7V
21)
Max
4.76
-
-
-
100
-
-
-
0.99
-
-
100
30
-
IL
and V
SPI Real time clock / calendar
V
Min
-
160
100
100
-
30
40
100
-
10
40
-
-
0
DD
IH
= 4.5V
with an input voltage swing of
Max
6.25
-
-
-
100
-
-
-
0.99
-
-
75
30
-
PCA2125
V
Min
-
125
62.5
62.5
-
30
30
100
-
5
30
-
-
0
© NXP B.V. 2007. All rights reserved.
DD
= 5.5V
Max
8.0
-
-
-
100
-
-
-
0.99
-
-
60
25
-
31 of 40
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
s
ns
ns
ns
ns
ns