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參數資料
| 型號： | MCP795W22T-I/ST |
| 廠商： | Microchip Technology |
| 文件頁數： | 1/13頁 |
| 文件大小： | 0K |
| 描述： | IC RTCC 2KB EE WD/EVENT 14TSSOP |
| 標準包裝： | 2,500 |
| 類型： | 時鐘/日歷 |
| 特點： | 警報，EEPROM，閏年，方波輸出，SRAM，唯一 ID，看門狗定時器 |
| 存儲容量： | 64B |
| 時間格式： | HH:MM:SS:hh（12/24 小時） |
| 數據格式： | YY-MM-DD-dd |
| 接口： | SPI |
| 電源電壓： | 1.8 V ~ 5.5 V |
| 電壓 - 電源，電池： | 1.3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 14-TSSOP |
| 包裝： | 帶卷 (TR) |
2011-2012 Microchip Technology Inc.
Preliminary
DS22280C-page 1
MCP795W1X/MCP795W2X
Device Selection Table
Timekeeping Features:
Real-Time Clock/Calendar:
- Hours, Minutes, Seconds, Hundredth of
Seconds, Day of Week, Month, Year, Leap
Year
Crystal Oscillator requires External 32,768 kHz
Tuning Fork Crystal and Load Capacitors.
Clock Out Function:
- 1Hz, 4.096 kHz, 8.192 kHz, 32.768 kHz
2 Programmable Alarms – Supports IRQ or WDO
Programmable open drain output – Alarm or
Interrupt
On-Chip Digital Trimming/Calibration:
- +/- 255 PPM range in 1 PPM steps
Power-Fail Time-Stamp @ Battery Switchover:
- Logs time when VCC fails and VCC is restored
Low-Power Features:
Wide Operating Voltage:
-VCC: 1.8V to 3.6V
-VBAT: 1.3V to 3.6V
Low Operating Current:
-VCC Standby Current < 1uA @ 3V
-VBAT Timekeeping Current: <700nA @ 1.8V
Automatic Battery Switchover from VCC to VBAT:
- Backup power for timekeeping and SRAM
retention
User Memory:
64-Byte Battery-Backed SRAM
2 Kbit and 1 Kbit EEPROM Memory:
- Software block write-protect (, , or entire
array)
- Write Page mode (up to 8 bytes)
- Endurance: 1M erase/write cycles
128-Bit Unique ID in Protected Area of EEPROM:
- Available blank or preprogrammed
- EUI-48 or EUI-64 MAC address
- Unlock sequence for user programming
Enhanced Features:
SPI Clock Speed up to 5 MHz
Programmable Watchdog Timer:
- Dedicated watchdog output pin
- Dual retrigger using SPI bus or EVHS digital
input
Dual Configurable Event Detect Inputs:
- High-Speed Digital Event Detect (EVHS) with
pulse count for 1st, 4th,16th or 32nd event
- Low-Speed Event Detect (EVLS) with
programmable debounce delays of 31 msec
and 500 msec
- Edge triggered (rising or falling)
- Operates from VCC or VBAT
Operating Temperature Ranges:
- Industrial (I Temp): -40°C to +85°C.
Packages include 14-Lead SOIC and TSSOP
Package Types (not to scale)
Part Number
32 kHz
Boot-up
SRAM
(Bytes)
EEPROM
(Kbits)
Unique
ID
MCP795W20
No
64
2
Blank
MCP795W10
No
64
1
Blank
MCP795W21
No
64
2
EUI-48
MCP795W11
No
64
1
EUI-48
MCP795W22
No
64
2
EUI-64
MCP795W12
No
64
1
EUI-64
Note:
Watchdog Timer and Event Detects in all devices.
X1
X2
VBAT
WDO
Vcc
CLKOUT/BOOT
EVHS
EVLS
1
2
3
4
14
13
12
11
M
C
P7
95W
XX
SOIC/TSSOP
IRQ
CS
VSS
SCK
SI
SO
5
6
7
10
9
8
Note:
MCP795WXX is used in this document as a
generic part number for the MCP795W1X,
MCP795W2X devices.
3V SPI Real-Time Clock Calendar with
Enhanced Features and Battery Switchover
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