参数资料
型号: LTC1536CS8#TR
厂商: Linear Technology
文件页数: 1/12页
文件大小: 0K
描述: IC MONITOR PREC TRPL SPPLY 8SOIC
标准包装: 2,500
类型: 多压监控器
监视电压数目: 3
输出: 开路漏极或开路集电极
复位: 高有效/低有效
复位超时: 最小为 140 ms
电压 - 阀值: 2.985V,4.725V,可调
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 带卷 (TR)
LTC1536
Precision Triple Supply Monitor
for PCI Applications
FEATURES
DESCRIPTIO
Simultaneously Monitors 5V, 3.3V and
Adjustable Inputs
Guaranteed Threshold Accuracy: ± 0.75%
Low Supply Current: 100 μ A
Internal Reset Time Delay: 200ms
Manual Pushbutton Reset Input
Active Low and Active High Reset Outputs
Active Low “Soft” Reset Output
Power Supply Glitch Immunity
Guaranteed Reset for Either V CC3 ≥ 1V or V CC5 ≥ 1V
Meets PCI t FAIL Timing Specifications Rev 2.1
8-Pin SO and MSOP Packages
The LTC ? 1536 is designed for PCI local bus applications
with multiple supply voltages that require low power,
small size, high speed and high accuracy supply
monitoring.
For 3.3V and 5V supplies that are > 500mV below spec or
for the condition when the 5V supply falls below the 3.3V
supply, the LTC1536 has a very fast response time capable
of meeting the PCI t FAIL timing specification. Tight 0.75%
threshold accuracy and glitch immunity ensure reliable
reset operation without false triggering.
The RST output is guaranteed to be in the correct state for
V CC5 or V CC3 down to 1V. The 100 μ A typical supply current
APPLICATIO S
■ PCI-Based Systems
■ Desktop Computers
makes the LTC1536 ideal for power-conscious systems.
A manual pushbutton reset input provides the ability to
generate a very narrow “soft” reset pulse (100 μ s typ) or a
200ms reset pulse equivalent to a power-on reset. Both
Notebook Computers
Intelligent Instruments
Portable Battery-Powered Equipment
Network Servers
SRST and RST outputs are open-drain and can be OR-tied
with other reset sources.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
Power Fail Waveform
Motherboard PCI RST Generation
5V Dropping Below 3.3V by 300mV
3.3V ± 0.3V
5V ± 5%
PWR GOOD
0.1 μ F
0.1 μ F
1
2
3
4
LTC1536
V CC3 PBR
V CC5 SRST
V CCA RST
GND RST
8
7
6
5
PUSHBUTTON
RESET
R PU
RST
PCI
LOCAL
BUS
5
4
3
2
1
V CC5
V CC5 = 5V TO 3V STEP
V CC3 = V CCA = 3.3V
4.7k PULL-UP FROM
RST TO V CC3
RST
R PU SELECTED TO MEET RISE TIME
SLEW RATE REQUIREMENTS (1k MIN)
1536 TA01
0
TIME (20ns/DIV)
1536 TA02
1536fa
1
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