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参数资料
| 型号： | RTC-62423A-3 |
| 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, PDSO24 |
| 封装： | SOP-24 |
| 文件页数： | 13/24页 |
| 文件大小： | 195K |
| 代理商： | RTC-62423A-3 |
RTC - 62421 / 62423
Page - 17
MQ152-05
! Power supply circuit example
RTC
VDD
CS1
GND
+5 V
+
Note 1 Note 2
Voltage
detection
circuit
Ceramic capacitor of
0.01
F to 0.1 F
Note 1: This capacitor must be of a high capacity because a transient reverse current flows from the collector to the emitter
of the transistor when the power is turned off.
Note 2: Use a chargeable or lithium battery. If a chargeable battery is used, there is no need for the diode. If a lithium battery
is used, the diode is necessary. For specific details of the resistance of the resistor, contact the manufacturer of the
battery that is used.
! Examples of connection to general-purpose microprocessor
When connecting the RTC-62421/RTC-62423 to a microprocessor, carefully check the AC timings of both the RTC and the
microprocessor.
1. Connection to multiplexed bus type
AD3
AD2
AD1
AD0
IO/M
ALE
RD
WR
A3
A2
A1
A0
D3
D2
D1
D0
CS0
ALE
RD
WR
8085/MCS48,51
RTC-62421/3
Upper address bus
Decoder
AD3
AD2
AD1
AD0
IO/M
ALE
RD
WR
A3
A2
A1
A0
D3
D2
D1
D0
CS0
ALE
RD
WR
8085/MCS48,51
RTC-62421/3
Upper address bus
Decoder
Latch
The resistors on the
RD
and
WR
lines are not necessary if the CPU does not have a HALT or HOLD state.
2. Connection to Z80 or compatible CPU
3. Connection to 68-series MPU
A3
A2
A1
A0
RD
WR
A3
A2
A1
A0
D3
D2
D1
D0
CS0
ALE
RD
WR
Z80, SMC84C00AC
RTC-62421/3
D3
D2
D1
D0
IORQ or
MEMRQ
LS32 etc.
Upper address bus
Decoder
A3
A2
A1
A0
R/W
E
A3
A2
A1
A0
D3
D2
D1
D0
CS0
ALE
RD
WR
68-series MPU
RTC-62421/3
D3
D2
D1
D0
LS04 etc.
LS00 etc.
Upper address bus
Decoder
*Select
IORQ
or
MEMRQ
depending on whether the RTC
maps I/O or memory of the CPU.
相关PDF资料 |
PDF描述 |
|---|---|
| RTC-62423B-0 | REAL TIME CLOCK, PDSO24 |
| RTC-72421A | 0 TIMER(S), REAL TIME CLOCK, PDIP18 |
| RTC-72421B | 0 TIMER(S), REAL TIME CLOCK, PDIP18 |
| RTC-72423A-0 | 0 TIMER(S), REAL TIME CLOCK, PDSO24 |
| RTC-72423B-0 | REAL TIME CLOCK, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RTC63421 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:4-bit MULTIFUNCTIONAL REAL TIME CLOCK MODULE |
| RTC-63421 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:4-bit MULTIFUNCTIONAL REAL TIME CLOCK MODULE |
| RTC-63421A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Real-Time Clock |
| RTC-63421B | 功能描述:IC RTC SER +-50PPM 18-DIP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 实时时钟 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 类型:时钟/日历 特点:警报器，闰年，SRAM 存储容量:- 时间格式:HH:MM:SS（12/24 小时） 数据格式:YY-MM-DD-dd 接口:SPI 电源电压:2 V ~ 5.5 V 电压 - 电源，电池:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WDFN 裸露焊盘 供应商设备封装:8-TDFN EP 包装:管件 |
| RTC-63421M | 制造商:未知厂家 制造商全称:未知厂家 功能描述:4-bit MULTIFUNCTIONAL REAL TIME CLOCK MODULE |
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