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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： | 23/53页 |
| 文件大小： | 343K |
| 代理商： | R2051K02 |
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R2051 Series
12345
Rev.1.04
- 3 -
n PIN DESCRIPTION
Symbol
Item
Description
SCL
Serial
Clock Line
The SCL pin is used to input clock pulses synchronizing the input and output
of data to and from the SDA pin. Allows a maximum input voltage of 5.5 volts
regardless of supply voltage.
SDA
Serial
Data Line
The SDA pin is used to input or output data intended for writing or reading in
synchronization with the SCL pin. Up to 5.5v beyond VDD may be input.
This pin functions as an Nch open drain output.
/INTR
Interrupt
Output
The /INTR pin is used to output alarm interrupt (Alarm_W) and alarm interrupt
(Alarm_D) and output periodic interrupt signals to the CPU signals. Disabled
at power-on from 0V. Nch. open drain output.
CLKOUT
32kHz Clock
Output
The CLKOUT pin is used to output 32.768-kHz clock pulses. CMOS output.
“H” level is always equal to VCC.
VCC
Main Battery
input
Supply power to the IC.
VSB
Power Supply
Input for Backup
Battery
Connect a primary battery for backup. Normally, power is supplied from VCC
to the IC. If VCC level is equal or less than –VDET1, power is supplied from
this pin.
OSCIN
OSCOUT
Oscillation
Circuit
Input / Output
The OSCIN and OSCOUT pins are used to connect the 32.768-kHz crystal
oscillator (with all other oscillation circuit components built into the R2051K
series).
VDD
Positive Power
Supply Input
The VDD pin is connected to the power supply. Connect a capacitor as much
as 0.1
F between VDD and VSS. In the case of using a secondary battery,
connecting the secondary battery to this pin is possible.
/VDCC
VCC Power
Supply Monitoring
Result Output
While monitoring VCC Power supply, if the voltage is equal or lower than
–VDET1, this output level is “L”. When /VDCC becomes “L”, SW1 turns off
and SW2 turns on. As a result, power is supplied from VSB pin to the internal
real time clock. When VCC is equal to +VDET1 or more, SW1 turns on and
SW2 turns off. After t DELAY passed, /VDCC output becomes off, or “H”.
Nch Open-drain output.
CIN
Noise Bypass Pin
To stabilize the internal reference, connect a capacitor as much as 0.1uF
between this pin and VSS.
VSS
Negative Power
Supply Input
The VSS pin is grounded.
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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 |
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