參數(shù)資料
型號(hào)： MCP7940NT-I/MS
元件分類： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： REAL TIME CLOCK, PDSO8
封裝： PLASTIC, MSOP-8
文件頁(yè)數(shù)： 23/36頁(yè)
文件大?。?/td> 551K
代理商： MCP7940NT-I/MS
2011 Microchip Technology Inc.
DS25010A-page 3
MCP7940N
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings ()
VCC............................................................................................................................................................................. 6.5V
All inputs and outputs w.r.t. VSS ..........................................................................................................-0.6V to VCC +1.0V
Storage temperature ............................................................................................................................... -65°C to +150°C
Ambient temperature with power applied................................................................................................-40°C to +125°C
ESD protection on all pins
4 kV
TABLE 1-1:
DC CHARACTERISTICS
NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above those
indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.
DC CHARACTERISTICS
Electrical Characteristics:
Industrial (I):
VCC = +1.8V to 5.5V
TA = -40°C to +85°C
Param.
No.
Sym.
Characteristic
Min.
Typ.
Max.
Units
Conditions
—
SCL, SDA pins
—
D1
VIH
High-level input voltage
0.7 VCC
—V
—
D2
VIL
Low-level input voltage
—
0.3 VCC
0.2 VCC
VVCC = 2.5V to 5.5V
D3
VHYS
Hysteresis of Schmitt
Trigger inputs
(SDA, SCL pins)
0.05
VCC
—V
D4
VOL
Low-level output voltage
(MFP, SDA)
—0.40
V
IOL = 3.0 ma @ VCC = 4.5V
IOL = 2.1 ma @ VCC = 2.5V
D5
ILI
Input leakage current
—
±1
AVIN = VSS or VCC
D6
ILO
Output leakage current
—
±1
AVOUT = VSS or VCC
D7
CIN,
COUT
Pin capacitance
(SDA, SCL and MFP)
—10
pF
VCC = 5.0V (Note 1)
TA = 25°C, f = 400 kHz
D8
ICC Read Operating current
SRAM
—
300
AVCC = 5.5V, SCL = 400 kHz
ICC Write
—
400
AVCC = 5.5V, SCL = 400 kHz
D9
ICCS
Standby current (Note 2)
—5
AVCC = 5.5V, SCL = SDA = VCC
D10
IBAT
VBAT Standby Current
—700
—
nA
VBAT = 1.8V @ 25°C
D11
VTRIP
VBAT Change Over
1.3
1.7
V
1.5V typical at TAMB = 25°C
D12
VCCFT
VCC Fall Time (Note 1)
300
—
sFrom VTRIP (max) to VTRIP (min)
D13
VCCRT
VCC Rise Time (Note 1)
0—
sFrom VTRIP (min) to VTRIP (max)
D14
VBAT
VBAT Voltage Range
1.3
5.5
V
—
Note 1:
This parameter is periodically sampled and not 100% tested.
2:
Standby with oscillator running
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