ISL8702

Adjustable Quad Sequencer

OVERVIEW

The ISL8700, ISL8701, ISL8702 family of ICs provide four delay adjustable sequenced outputs while monitoring an input voltage all with a minimum of external components.

High performance DSP, FPGA, µP and various subsystems require input power sequencing for proper functionality at initial power-up and the ISL870X provides this function while monitoring the distributed voltage for over and undervoltage compliance.

The ISL8700 and ISL8701 operate over the +2.5V to +24V nominal voltage range, whereas the ISL8702 operates over the 2.5V to +12V range. All three have a user adjustable time from UV and OV voltage compliance to sequencing start via an external capacitor when in auto start mode and adjustable time delay to subsequent ENABLE output signal via external resistors.

Additionally, the ISL8702 provides an input for sequencing on and off operation (SEQ_EN) and for voltage window compliance reporting (FAULT) over the +2.5V to +12V voltage range.

Easily daisy chained for more than 4 sequenced signals.

Altogether, the ISL870X provides these adjustable features with a minimum of external BOM. See Figure 1 for typical implementation.

KEY FEATURES

  • Adjustable Delay to Subsequent Enable Signal
  • Adjustable Delay to Sequence Auto Start
  • Adjustable Distributed Voltage Monitoring
  • Under and Overvoltage Adjustable Delay to Auto Start Sequence
  • I/O Options
  • ENABLE (ISL8700, ISL8702) and ENABLE# (ISL8701) SEQ_EN (ISL8702)
  • Voltage Compliance Fault Output
  • Pb-Free (RoHS Compliant)

PARAMETRICS

Parameters
ISL8702
Basic Information
生产状态
Mass Production
VBIAS (最小值)
2.5 V
VBIAS (最大值) (V)
12
序列电压 (最小值)
2.5 V
序列电压 (最大值)
12 V
启用
Active High
逻辑电平
TTL
初始启动要求
UV/OV & EN
监控输入
1
序列输出控制
Active High, Open Drain
当VIN不符合标准时,关闭的通道数量
4 Simultaneous
预设或可调序列
Preset Order, Adjustable Delay
特性
Fault Reporting
掉电序列
Yes
资质级别
Standard
序列电压范围 (V)
2.5 to 12
偏置电压范围 (V)
2.5 to 12
温度范围
-40 to +85

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