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参数资料
| 型号： | ISL12028 |
| 厂商： | Intersil Corporation |
| 英文描述： | Real Time Clock/Calendar with EEPROM(带EEPROM实时时钟/日历) |
| 中文描述： | 实时时钟/日历带有EEPROM（带EEPROM的实时时钟/日历） |
| 文件页数： | 3/4页 |
| 文件大小： | 112K |
| 代理商： | ISL12028 |
3
TB460.0
February 16, 2005
TABLE 2. REPLACING THE X1227 WITH THE ISL12027
FUNCTION
OLD X1227
NEW ISL12027
AFFECTS
SOFTWARE
Battery Switchover
Device switches to battery mode once
V
CC
<V
BAT
Device switches to battery when 1)
V
CC
<V
BAT
AND
2)
V
CC
<
V
RESET
with option to work the
old way (called "LP Mode")
NO
Battery Switchover
Hysteresis on V
DD
negative transistion
only in legacy mode
Hysteresis on both V
DD
negative and positive
transistions
NO
Battery Current
1.25μA battery backup current
800nA battery backup current
NO
Power Supply
Min rise/fall times for V
CC
only
Max slew rate for V
DD
NO
Reset Trip Voltages
4 available reset thresholds with ±2.5%
accuracy (old floating gate reference)
5 available reset thresholds with ±1.5%
accuracy (more accurate bandgap)
NO
Reset Trip Voltages
Thresholds adjusted using complicated
analog voltage setting procedure
Thresholds programmed (1 of 5) using
EEPROM register
NO
I
2
C Operation with Battery
Device could work as long as
V
BAT
>V
DD
>V
RESET
No reset, no I
2
C communication
Selectable operation whether
I
2
C
is active in
battery backup
NO
Operation with NO
Oscillator
Reset will occur with no battery,
I
2
C
can
communicate
NO
EEPROM
64-byte page write
16-byte page write
YES
Status Register
(None)
Status bit to indicate oscillator stopped
NO - Optional additional
functionality
Status Register
Legacy switchover only
BSW mode bit to change from legacy to
standard mode for battery switchover
NO - Optional additional
functionality
Control Registers
(None)
Memory map to expand slightly from addition
of bits
NO - Optional additional
functionality
RTC Registers
Byte write or page write
Page write ONLY -
No single byte writes to
setup RTC registers
YES
Pin Names
V
BACK
V
BAT
NO
Pin Names
V
CC
V
DD
NO
Clock Inputs
External clocking on X1 with special input No external clocking
NO
Technical Brief 460
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL12028_10 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Real Time Clock/Calendar with I2C Busa?￠ and EEPROM |
| ISL12028_1011 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Real Time Clock/Calendar with I2C Bus? and EEPROM |
| ISL12028A | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Real Time Clock/Calendar with I2C Bus? and EEPROM |
| ISL12028AIB27Z | 功能描述:实时时钟 REAL TIME CLKRTC W/ EPROM 2 63VSET 14 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| ISL12028AIB27Z-T | 功能描述:实时时钟 REAL TIME CLKRTC W/ EPROM 2 63VSET 14 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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