- 您现在的位置：买卖IC网 > PDF目录69302 > R2051K02 (RICOH COMPANY LTD) 0 TIMER(S), REAL TIME CLOCK, QCC12 PDF资料下载
参数资料
| 型号： | R2051K02 |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, QCC12 |
| 封装： | 2 X 2 MM, 0.85 MM PITCH, ULTRA-COMPACT, FFP, 12 PIN |
| 文件页数： | 33/53页 |
| 文件大小： | 343K |
| 代理商： | R2051K02 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页当前第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页
R2051 Series
12345
Rev.1.04
- 39 -
The VCC supply voltage monitor circuit operates always. When VCC rising over +VDET1, SW1 turns on, and SW2
turns off.
And tDELAY after rising VCC, /VDCC outputs OFF(H).
But when oscillation is halt, VCC outputs
OFF(H) tDELAY after oscillation starting. When VCC falling beyond -VDET1, SW1 turns off, and SW2 turns on.
And /VDCC outputs “L”.
VDD
32768Hz Oscillation
/VDCC
+VDET1
VCC
SW1
SW2
tDELAY
ON
Same voltage level as VSB
Oscillation starting
-VDET1
n Battery Switch Over Circuit
R2051 incorporates three power supply pins, VDD, VCC, and VSB. VDD pin is the power supply pin for internal
real time clock circuit. When VCC voltage is lower than
±VDET1, VSB supplies the power to VDD, and when
higher than
±VDET1, VCC supplies the power to VDD. The timing chart for VCC, VDD, and VSB is shown
following.
VDD
+VDET1
VCC
VSB
(1)
(2)
(3)
(2)
-VDET1
(1) When VSB is 0v and VCC is rising from 0v, VDD follows half of VCC voltage level. After VCC rising over
+VDET1, VDD follows VCC voltage level.
(2) When VCC is higher than +VDET1, VDD level is equal to VCC.
(3) After VCC falling beyond -VDET1, VDD level is equal to VSB.
相关PDF资料 |
PDF描述 |
|---|---|
| R2051K01 | 0 TIMER(S), REAL TIME CLOCK, QCC12 |
| R3F10031NSP | FLASH, 8 MHz, MICROCONTROLLER, PDSO24 |
| R3F10011NSP | FLASH, 8 MHz, MICROCONTROLLER, PDSO20 |
| R3F10011NXXXSP | MROM, 8 MHz, MICROCONTROLLER, PDSO20 |
| R42181 | SINGLE COLOR LED, RED, 5.6 mm |
相关代理商/技术参数 |
参数描述 |
|---|---|
| R2051K02-E2 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2051S01-E2 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2051S02-E2 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2051S03-E2 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
| R2051T01-E2 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function |
发布紧急采购，3分钟左右您将得到回复。