參數(shù)資料
型號(hào)： RS5C372A
廠商： RICOH COMPANY LTD
元件分類： XO, clock
英文描述： I2C bus SERIAL INTERFACE REAL-TIME CLOCK ICs
中文描述： 0 TIMER(S), REAL TIME CLOCK, PDSO8
封裝： SSOP-8
文件頁(yè)數(shù)： 41/59頁(yè)
文件大?。?/td> 442K
代理商： RS5C372A
RS5C372A/B
37
(A) course
Adjustment of clock is not made for IC (no adjustment) and any C
L
value may be used for the crystal oscillator. Pre-
cision fluctuations of a crystal oscillator may be selected as long as clock precision allows. Obtain the central fre-
quency as described in section 2.2 using several crystal oscillator and ICs, determine an adjustment value as
described in “2.4 Time Trimming Circuit” which shall be set to the RS5C372A/B.
(B) course
To keep clock precision within the range of (fluctuation in crys-tal oscillator + fluctuation in IC), clock shall be
adjustment is required for each IC. On adjusting procedures see “2.4 Time Trimming Circuit.” Available selection
range for the frequency precision fluctuations and C
L
(load capacitance) for a crystal oscillator may be widened by
adjusting clock frequency. Obtain the central frequency as described in section 2.2 using the crystal oscillator and
IC to be used, determine if an adjustment is possible or not using the clock adjustment circuit, perform adjustment
for each IC using the clock adjustment circuit. Up to ±1.5ppm may be adjusted at a room temperature.
(C) course
In (C) and (D) courses, adjustment of 32-kHz clock output frequency as well as clock is necessary. Frequency
adjustment for the crystal oscillator is made by adjusting both of C
G
and C
D
connected to the both ends of the oscil-
lator. Since the RS5C372A/B incorporate the C
G
and C
D
, oscillating frequency is required using C
L
of the crystal
oscillator as the reference.
Generally, relation between C
L
and C
G
or C
D
is as follows:
C
L
=C
G
×
C
D
+ C
S
C
G
+ C
D
C
S
: Board floating capacitance
Although a crystal oscillator having C
L
value of around 6 to 8pF is recommended for the RS5C372A/B, measure
oscillation frequency as described in section 2.2 and if frequency is high (clock gains) switch to a crystal oscillator
with smaller C
L
while if frequency is small (clock loses) switch to an oscillator with larger C
L
. Using these proce-
dures select a crystal oscillator with optimal C
L
and set unadjusted value to the clock adjustment circuit.(See section
2.4, “Time Trimming Circuit”.) We recommend to consult the crystal manufacturer on compatibility of C
L
values.
High oscillation frequency (clock gains) may be adjusted by externally adding C
GOUT
as shown below.
8
7
6
RS5C372A/B
R
F
R
D
C
D
C
G
OSCIN
OSCOUT
32kHz
C
GOUT
VDD
V
DD
*
1
*
1) C
GOUT
shall be from 0 to 15pF.
(D) course
Select a crystal oscillator as in the (C) course, then adjust clock error for each IC as in (B) course. For clock adjust-
ing procedures, see “2.4 Time Trimming Circuit.”
相關(guān)PDF資料
PDF描述
RS5C372B I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C372B-E1 I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C372B-E2 I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C62 REAL-TIME CLOCK
RSBL-9-S Using Permanent Magnet, High sensitivity Two Poles Signal Relay RSB RELAYS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
RS5C372B 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C372B-E1 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C372B-E2 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C373A 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Real-Time Clock
RS5C4FC 制造商:Dialight 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*