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CDP68HC68T1M

更新时间： 2024-02-10 09:41:22
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英特矽尔 - INTERSIL 外围集成电路光电二极管时钟
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24页 141K
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CMOS Serial Real-Time Clock With RAM and Power Sense/Control

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CDP68HC68T1M 数据手册

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CDP68HC68T1  
CMOS Serial Real-Time Clock With  
RAM and Power Sense/Control  
August 1997  
Features  
Pinouts  
CDP68HC68T1 (PDIP, SBDIP, SOIC)  
• SPI (Serial Peripheral Interface)  
• Full Clock Features  
TOP VIEW  
- Seconds, Minutes, Hours (12/24, AM/PM), Day of  
Week, Date, Month, Year (0-99), Automatic Leap Year  
1
2
3
4
5
6
7
8
CLKOUT  
CPUR  
INT  
16  
15  
V
DD  
XTAL OUT  
• 32 Word x 8-Bit RAM  
14 XTAL IN  
• Seconds, Minutes, Hours Alarm  
SCK  
13  
12  
V
V
BATT  
SYS  
• Automatic Power Loss Detection  
• Low Minimum Standby (Timekeeping) Voltage. . . 2.2V  
• Selectable Crystal or 50/60Hz Line Input  
• Buffered Clock Output  
MOSI  
MISO  
11 LINE  
10 POR  
CE  
V
9
PSE  
SS  
• Battery Input Pin that Powers Oscillator and also  
Connects to V  
Pin When Power Fails  
DD  
CDP68HC68T1 (SOIC)  
TOP VIEW  
• Three Independent Interrupt Modes  
- Alarm  
1
2
3
4
5
6
7
8
9
CLK OUT  
CPUR  
INT  
20 VDD  
- Periodic  
XTAL OUT  
19  
- Power-Down Sense  
18 XTAL IN  
17  
NC  
Description  
NC  
SCK  
16  
15  
V
V
BATT  
The CDP68HC68T1 Real-Time Clock provides  
a
time/calendar function, a 32 byte static RAM, and a 3 wire  
Serial Peripheral Interface (SPI Bus). The primary function of  
the clock is to divide down a frequency input that can be  
supplied by the on-board oscillator in conjunction with an  
external crystal or by an external clock source. The internal  
oscillator can operate with a 32KHz, 1MHz, 2MHz, or 4MHz  
crystal. An external clock source with a 32KHz, 1MHz,  
2MHz, 4MHz, 50Hz or 60Hz frequency can be used to drive  
the CDP68HC68T1. The time registers hold seconds,  
minutes, and hours, while the calendar registers hold day-of-  
week, date, month, and year information. The data is stored  
in BCD format. In addition, 12 or 24 hour operation can be  
selected. In 12 hour mode, an AM/PM indicator is provided.  
The T1 has a programmable output which can provide one  
of seven outputs for use elsewhere in the system.  
MOSI  
SYS  
MISO  
CE  
14 NC  
13 NC  
12  
V
LINE  
SS  
PSE 10  
11  
POR  
Ordering Information  
TEMP.  
o
PKG.  
NO.  
PART NUMBER  
CDP68HC68T1E  
CDP68HC68T1D  
CDP68HC68T1M  
CDP68HC68T1M2  
CDP68HC68T1W  
RANGE ( C)  
-40 to 85  
-40 to 85  
-40 to 85  
-40 to 85  
-40 to 85  
PACKAGE  
16 Ld PDIP  
16 Ld SBDIP  
20 Ld SOIC  
16 Ld SOIC  
DIE  
E16.3  
D16.3  
M20.3  
M16.3  
Computer handshaking is controlled with a “wired-OR”  
interrupt output. The interrupt can be programmed to provide  
a signal as the result of: 1) an alarm programmed to occur at  
a predetermined combination of seconds, minutes, and  
hours; 2) one of 15 periodic interrupts ranging from sub-  
second to once per day frequency; 3) a power fail detect.  
NOTE: Pin number references throughout this specification refer to  
the 16 lead PDIP/SBDIP/SOIC. See pinouts for cross reference.  
The PSE output and the V  
input are used for external  
SYS  
power control. The CPUR output is available to reset the  
processor under power-down conditions. CPUR is enabled  
under software control and can also be activated via the  
CDP68HC68T1’s watchdog. If enabled, the watchdog  
requires a periodic toggle of the CE pin without a serial  
transfer.  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999  
File Number 1547.3  
1
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CDP68HC68T1M 替代型号

型号 品牌 替代类型 描述 数据表
CDP68HC68T1MZ INTERSIL

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