数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

ISL12059IBZ 数据表(PDF) 10 Page - Intersil Corporation

部件名 ISL12059IBZ
功能描述  Low Cost and Low Power I2C Bus??Real Time Clock/Calendar
Download  11 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  INTERSIL [Intersil Corporation]
网页  http://www.intersil.com/cda/home
标志 INTERSIL - Intersil Corporation

ISL12059IBZ 数据表(HTML) 10 Page - Intersil Corporation

Back Button ISL12059IBZ Datasheet HTML 3Page - Intersil Corporation ISL12059IBZ Datasheet HTML 4Page - Intersil Corporation ISL12059IBZ Datasheet HTML 5Page - Intersil Corporation ISL12059IBZ Datasheet HTML 6Page - Intersil Corporation ISL12059IBZ Datasheet HTML 7Page - Intersil Corporation ISL12059IBZ Datasheet HTML 8Page - Intersil Corporation ISL12059IBZ Datasheet HTML 9Page - Intersil Corporation ISL12059IBZ Datasheet HTML 10Page - Intersil Corporation ISL12059IBZ Datasheet HTML 11Page - Intersil Corporation  
Zoom Inzoom in Zoom Outzoom out
 10 / 11 page
background image
10
FN6757.0
June 15, 2009
Application Section
Oscillator Crystal Requirements
The ISL12059 uses a standard 32.768kHz crystal. Either
through hole or surface mount crystals can be used. Table 6
lists some recommended surface mount crystals and the
parameters of each. This list is not exhaustive and other
surface mount devices can be used with the ISL12059 if
their specifications are very similar to the devices listed.
The crystal should have a required parallel load capacitance
of 12.5pF and an equivalent series resistance of less than
50k. The crystal’s temperature range specification should
match the application. Many crystals are rated for -10°C to
+60°C (especially through-hole and tuning fork types), so an
appropriate crystal should be selected if extended
temperature range is required.
Layout Considerations
The crystal input at X1 has a very high impedance, and
oscillator circuits operating at low frequencies such as
32.768kHz are known to pick up noise very easily if layout
precautions are not followed. Most instances of erratic clocking
or large accuracy errors can be traced to the susceptibility of
the oscillator circuit to interference from adjacent high speed
clock or data lines. Careful layout of the RTC circuit will avoid
noise pickup and insure accurate clocking.
Figure 10 shows a suggested layout for the ISL12059 device
using a surface mount crystal. Two main precautions should
be followed:
Do not run the serial bus lines or any high speed logic lines
in the vicinity of the crystal. These logic level lines can
induce noise in the oscillator circuit to cause misclocking.
Add a ground trace around the crystal with one end
terminated at the chip ground. This will provide termination
for emitted noise in the vicinity of the RTC device.
In addition, it is a good idea to avoid a ground plane under
the X1 and X2 pins and the crystal, as this will affect the load
capacitance and therefore the oscillator accuracy of the
circuit. If the FT/OUT pin is used as a clock, it should be
routed away from the RTC device as well. The traces for the
VDD pins can be treated as a ground, and should be routed
around the crystal.
FIGURE 9. MULTIPLE BYTES READ SEQUENCE
SIGNALS
FROM THE
MASTER
SIGNALS FROM
THE SLAVE
SIGNAL AT
SDA
S
T
A
R
T
IDENTIFICATION
BYTE WITH
R/W = 0
ADDRESS
BYTE
A
C
K
A
C
K
0
S
T
O
P
A
C
K
1
IDENTIFICATION
BYTE WITH
R/W = 1
A
C
K
S
T
A
R
T
LAST READ
DATA BYTE
FIRST READ
DATA BYTE
A
C
K
10
1
1000
10
1
10 00
R/W BIT = “0”
R/W BIT = “1”
TABLE 3. SUGGESTED SURFACE MOUNT CRYSTALS
MANUFACTURER
PART NUMBER
Citizen
CM200S
MicroCrystal
MS3V
Raltron
RSM-200S
SaRonix
32S12
Ecliptek
ECPSM29T-32.768K
ECS
ECX-306
Fox
FSM-327
FIGURE 10. SUGGESTED LAYOUT FOR ISL12059 AND
ISL12059


类似零件编号 - ISL12059IBZ

制造商部件名数据表功能描述
logo
Renesas Technology Corp
ISL12059IBZ RENESAS-ISL12059IBZ Datasheet
513Kb / 11P
   Low Cost and Low Power I2C Bus Real Time Clock/Calendar Low Power and Low Cost RTC
ISL12059IBZ-T RENESAS-ISL12059IBZ-T Datasheet
513Kb / 11P
   Low Cost and Low Power I2C Bus Real Time Clock/Calendar Low Power and Low Cost RTC
More results

类似说明 - ISL12059IBZ

制造商部件名数据表功能描述
logo
Intersil Corporation
ISL12058 INTERSIL-ISL12058 Datasheet
329Kb / 19P
   Low Cost and Low Power I2C-Bus??Real Time Clock/Calendar
logo
Renesas Technology Corp
ISL12059 RENESAS-ISL12059 Datasheet
513Kb / 11P
   Low Cost and Low Power I2C Bus Real Time Clock/Calendar Low Power and Low Cost RTC
logo
Intersil Corporation
ISL12057 INTERSIL-ISL12057 Datasheet
298Kb / 17P
   Low Cost and Low Power I2C RTC Real Time Clock/Calendar
logo
Renesas Technology Corp
ISL12058 RENESAS-ISL12058 Datasheet
837Kb / 20P
   Low Cost and Low Power I2C-Bus Real Time Clock/Calendar Low Power and Low Cost RTC with Alarm Function
logo
Microchip Technology
MCP7940M-I MICROCHIP-MCP7940M-I Datasheet
1,006Kb / 38P
   Low-Cost I2C??Real-Time Clock/Calendar with SRAM
11/29/11
MCP7940M MICROCHIP-MCP7940M Datasheet
1,006Kb / 38P
   Low-Cost I2C??Real-Time Clock/Calendar with SRAM
11/29/11
MCP7940N MICROCHIP-MCP7940N Datasheet
562Kb / 36P
   Low-Cost I2C??Real-Time Clock/Calendar with SRAM and Battery Switchover
2011
MCP7940N MICROCHIP-MCP7940N_13 Datasheet
1Mb / 42P
   Low-Cost I2C??Real-Time Clock/Calendar with SRAM and Battery Switchover
11/29/12
MCP7940NT-I-MNY MICROCHIP-MCP7940NT-I-MNY Datasheet
1Mb / 42P
   Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover
11/29/12
logo
Intersil Corporation
ISL12025 INTERSIL-ISL12025 Datasheet
423Kb / 27P
   Real-Time Clock/Calendar with I2C Bus and EEPROM
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com