參數(shù)資料
型號： MCP7940NT-I/SN
元件分類： 時鐘/數(shù)據(jù)恢復(fù)及定時提取
英文描述： REAL TIME CLOCK, PDSO8
封裝： 3.90 MM, ROHS COMPLIANT, PLASTIC, SOIC-8
文件頁數(shù)： 31/36頁
文件大小： 551K
代理商： MCP7940NT-I/SN
MCP7940N
DS25010A-page 4
2011 Microchip Technology Inc.
TABLE 1-2:
AC CHARACTERISTICS
Electrical Characteristics:
Industrial (I):
VCC = +1.8V to 5.5V
TA = -40°C to +85°C
Param.
No.
Symbol
Characteristic
Min.
Max.
Units
Conditions
1FCLK
Clock frequency
—
100
400
kHz
1.8V
VCC < 2.5V
2.5V
VCC 5.5V
2THIGH
Clock high time
4000
600
—
ns
1.8V
VCC < 2.5V
2.5V
VCC 5.5V
3TLOW
Clock low time
4700
1300
—
ns
1.8V
VCC < 2.5V
2.5V
VCC 5.5V
4TR
SDA and SCL rise time
—
1000
300
ns
1.8V
VCC < 2.5V
2.5V
VCC 5.5V
5TF
SDA and SCL fall time
—
1000
300
ns
1.8V
VCC < 2.5V
2.5V
VCC 5.5V
6THD:STA
Start condition hold time
4000
600
—
ns
1.8V
VCC < 2.5V
2.5V
VCC 5.5V
7TSU:STA
Start condition setup time
4700
600
—
ns
1.8V
VCC < 2.5V
2.5V
VCC 5.5V
8THD:DAT Data input hold time
0
—
ns
9TSU:DAT
Data input setup time
250
100
—
ns
1.8V
VCC < 2.5V
2.5V
VCC 5.5V
10
TSU:STO
Stop condition setup time
4000
600
—
ns
1.8V
VCC < 2.5V
2.5V
VCC 5.5V
11
TAA
Output valid from clock
—
3500
900
ns
1.8V
VCC < 2.5V
2.5V
VCC 5.5V
12
TBUF
Bus free time: Time the bus
must be free before a new
transmission can start
4700
1300
—
ns
1.8V
VCC < 2.5V
2.5V
VCC 5.5V
13
TSP
Input filter spike suppression
(SDA and SCL pins)
—50
ns
Note 1: Not 100% tested.
2: The combined TSP and VHYS specifications are due to new Schmitt Trigger inputs, which provide improved
noise spike suppression. This eliminates the need for a TI specification for standard operation.
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