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参数资料
| 型号： | TC1271TERC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4 |
| 封装： | SOT-143, 4 PIN |
| 文件页数： | 3/6页 |
| 文件大小： | 55K |
| 代理商： | TC1271TERC |
3
TC1270/1-1 9/15/99
TC1270
TC1271
4-PIN
P RESET MONITORS
APPLICATIONS INFORMATION
VCC Transient Rejection
The TC1270/1 provides accurate VCC monitoring and
reset timing during power-up, power-down, and brownout/
sag conditions, and rejects negative-going transients
(glitches) on the power supply line. Figure 1 shows the
maximum transient duration vs. maximum negative excur-
sion (overdrive) for glitch rejection. Any combination of
duration and overdrive that lays under the curve will not
generate a reset signal. Combinations above the curve are
detected as a brownout or power-down. Transient immunity
can be improved by adding a capacitor in close proximity to
the VCC pin of the TC1270/1.
Figure 1. Maximum Transient Duration vs.
Overdrive for Glitch Rejection at 25
°C
ELECTRICAL CHARACTERISTICS (Cont.) : Vcc = 5V for L/M versions, Vcc = 3.3V for T/S versions, Vcc = 3V for
R version, Vcc = 2.0V for F version. TA = –40°C to +85°C unless otherwise noted. Typical values are at TA = +25°C. (Note 1)
PIN DESCRIPTION
Pin No.
(SOT-143-4)
Symbol
Description
1
GND
Ground
2
RESET (TC1270)
RESET output remains low while VCC is below the reset voltage threshold, and
for at least 140 msec min. after VCC rises above reset threshold.
2
RESET (TC1271)
RESET output remains high while VCC is below the reset voltage threshold,
and for at least 140 msec min. after VCC rises above reset threshold.
3
MR
Manual Reset input generates a reset when MR is below VIL.
4VCC
Supply voltage
RESET COMPARATOR OVERDRIVE,
[V
CCTP - VCC](mV)
400
240
160
320
80
0
1
5
100
1000
MAXIMUM
TRANSIENT
DURATION
(
sec)
TA = +25°C
VTH
Duration
Overdrive
VCC
TC1272/3/4
Symbol Parameter
Test Conditions
Min
Typ
Max
Unit
VOL
RESET Output Voltage Low
TC1270R/S/T only:
—
0.3
V
(TC1270)
ISINK = 1.2 mA, VCC = VTH (MIN)
TC1270F only,:
ISINK = 500 A, VCC = VTH (MIN)
TC1270L/M only,
ISINK = 3.2 mA, VCC = VTH (MIN)
—
0.4
ISINK = 50 A, VCC > 1.0V
—
TBD
VOH
RESET Output Voltage
TC1270L/M only,
VCC – 1.5
—
V
High (TC1270)
ISOURCE = 800 A,
VCC > VTH(MAX)
TC1270R/S/T/F only
0.8 VCC
——
ISOURCE = 500 A,
VCC > VTH(MAX)
NOTES:
1. Production testing done at TA = +25°C, over temperature limits guaranteed by design.
2.RESET output for TC1270, RESET Output for T1271
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC1271TERCTR | 功能描述:监控电路 4-Pin uP 38V Reset RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TC1272 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:3-Pin Reset Monitors for 5V Systems |
| TC1272-10ENBTR | 功能描述:监控电路 3-Pin for 5V Systems RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TC1272-15ENBTR | 功能描述:监控电路 3-Pin for 5V Systems RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TC1272-5ENBTR | 功能描述:监控电路 3-Pin for 5V Systems RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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