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参数资料
型号： FM31T372-G
元件分类： 电源管理
英文描述： 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO14
封装： GREEN, MS-012, SOIC-14
文件页数： 15/26页
文件大小： 790K
代理商： FM31T372-G
FM31T372/374/376/378-G
Rev. 1.1
Apr. 2011
Page 22 of 26
DC Operating Conditions, continued (TA = -40 C to + 85 C, VDD = 2.7V to 5.5V unless otherwise specified)
Symbol
Parameter
Min
Typ
Max
Units
Notes
VIH
Input High Voltage
All inputs except those listed below
PFI (comparator input)
CNT1-2 battery backed (VDD < 2.4V)
CNT1-2 VDD > 2.4V
0.7 VDD
-
VBAK – 0.5
0.7 VDD
VDD + 0.3
3.75
VBAK + 0.3
VDD + 0.3
V
VOL
Output Low Voltage (IOL = 3 mA),
FOUT, /INT, /RST
-
0.4
V
VOH
Output High Voltage (IOH = -2 mA)
2.4
-
V
RRST
Pull-up Resistance for /RST Inactive
50
400
K
RIN
Input Resistance (pulldown)
A1-A0 for VIN = VIL max
A1-A0 for VIN = VIH min
20
1
K
M
VPFI
Power Fail Input Reference Voltage
1.175
1.20
1.225
V
VHYS
Power Fail Input (PFI) Hysteresis (Rising)
-
100
mV
Notes
1.
SCL toggling between VDD-0.3V and VSS, other inputs VSS or VDD-0.3V.
2.
All inputs at VSS or VDD, static. Stop command issued.
3.
VIN or VOUT = VSS to VDD. Does not apply to A0, A1, PFI, or /RST pins.
4.
VBAK = 3.0V, VDD < 2.4V, oscillator running, CNT1-2 at Vss or VBAK.
5.
/RST is asserted low when VDD < VTP.
6.
The minimum VDD to guarantee the level of /RST remains a valid VOL level.
7.
Full complete operation. Supervisory circuits, RTC, etc operate to lower voltages as specified.
8.
Includes /RST input detection of external reset condition to trigger driving of /RST signal by FM31T37x.
9.
The VBAK trickle charger automatically regulates the maximum voltage on this pin for capacitor backup applications.
10. VBAK will source current when trickle charge is enabled (VBC bit=1), VDD > VBAK, and VBAK < VBAK max.
AC Parameters (TA = -40 C to + 85 C, VDD = 2.7V to 5.5V, CL = 100 pF unless otherwise specified)
Symbol
Parameter
Min
Max
Min
Max
Min
Max
Units
Notes
fSCL
SCL Clock
Frequency
0
100
0
400
0
1000
kHz
tLOW
Clock Low Period
4.7
1.3
0.6
s
tHIGH
Clock High Period
4.0
0.6
0.4
s
tAA
SCL Low to SDA Data Out Valid
3
0.9
0.55
s
tBUF
Bus Free Before New Transmission
4.7
1.3
0.5
s
tHD:STA
Start Condition Hold Time
4.0
0.6
0.25
s
tSU:STA
Start Condition Setup for Repeated
Start
4.7
0.6
0.25
s
tHD:DAT
Data In Hold Time
0
ns
tSU:DAT
Data In Setup Time
250
100
ns
tR
Input Rise Time
1000
300
ns
1
tF
Input Fall Time
300
100
ns
1
tSU:STO
Stop Condition Setup Time
4.0
0.6
0.25
s
tDH
Data Output Hold (from SCL @ VIL)
0
ns
tSP
Noise Suppression Time Constant
on SCL, SDA
50
ns
All SCL specifications as well as start and stop conditions apply to both read and write operations.
RTC Frequency Characteristics
Symbol
Parameter
Min
Typ
Max
Units
FOUT
FOUT Clock Frequency
-
32.768
-
kHz
Δf/f
Frequency Stability
vs. Temperature
0 C to +45 C
±3
ppm
-40 C to +85 C
±5
ppm
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相关代理商/技术参数
参数描述
FM31T372-GTR 功能描述:F-RAM F-RAM 4K w/RTC RoHS:否 存储容量:512 Kbit 组织:64 K x 8 接口:SPI 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube 制造商:Cypress Semiconductor
FM31T374 制造商:RAMTRON 制造商全称:RAMTRON 功能描述:System Supervisor & Temperature Compensated RTC(TCXO) with Embedded Crystal
FM31T374-G 功能描述:F-RAM F-RAM 16K w/RTC RoHS:否 存储容量:512 Kbit 组织:64 K x 8 接口:SPI 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube 制造商:Cypress Semiconductor
FM31T374-GTR 功能描述:F-RAM F-RAM 16K w/RTC RoHS:否 存储容量:512 Kbit 组织:64 K x 8 接口:SPI 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube 制造商:Cypress Semiconductor
FM31T376 制造商:RAMTRON 制造商全称:RAMTRON 功能描述:System Supervisor & Temperature Compensated RTC(TCXO) with Embedded Crystal
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