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スーパーバイザとリセット IC

TL7770-12

アクティブ

プログラマブル遅延時間機能搭載、12V、プログラマブル、デュアル電源電圧スーパーバイザ

ご注文はこちら
データシート

TL7770-12

アクティブ
データシート ご注文はこちら

製品詳細

Number of supplies monitored 2 Threshold voltage 1 (typ) (V) 10.9 Features Complimentary output, Manual reset capable, Undervoltage and overvoltage monitor, Wide input voltage Reset threshold accuracy (%) 2 Iq (typ) (mA) 5 Output driver type/reset output Active-high, Active-low, Open-drain Supply voltage (min) (V) 3.5 Supply voltage (max) (V) 18 Rating Catalog Watchdog timer WDI (s) None Operating temperature range (°C) 0 to 70
Number of supplies monitored 2 Threshold voltage 1 (typ) (V) 10.9 Features Complimentary output, Manual reset capable, Undervoltage and overvoltage monitor, Wide input voltage Reset threshold accuracy (%) 2 Iq (typ) (mA) 5 Output driver type/reset output Active-high, Active-low, Open-drain Supply voltage (min) (V) 3.5 Supply voltage (max) (V) 18 Rating Catalog Watchdog timer WDI (s) None Operating temperature range (°C) 0 to 70
SOIC (DW) 16 106.09 mm² 10.3 x 10.3
  • Power-On Reset Generator
  • Automatic Reset Generation After Voltage Drop
  • RESET\ Defined When VCC Exceeds 1 V
  • Wide Supply-Voltage Range...3.5 V
    to 18 V
  • Precision Overvoltage and Undervoltage Sensing
  • 250-mA Peak Output Current for Driving SCR Gates
  • 2-mA Active-Low SCR Gate Drive for False-Trigger Protection
  • Temperature-Compensated Voltage Reference
  • True and Complementary Reset Outputs
  • Externally Adjustable Output Pulse Duration
  • Power-On Reset Generator
  • Automatic Reset Generation After Voltage Drop
  • RESET\ Defined When VCC Exceeds 1 V
  • Wide Supply-Voltage Range...3.5 V
    to 18 V
  • Precision Overvoltage and Undervoltage Sensing
  • 250-mA Peak Output Current for Driving SCR Gates
  • 2-mA Active-Low SCR Gate Drive for False-Trigger Protection
  • Temperature-Compensated Voltage Reference
  • True and Complementary Reset Outputs
  • Externally Adjustable Output Pulse Duration

The TL7770 is an integrated-circuit system supervisor designed for use as a reset controller in microcomputer and microprocessor power-supply systems. This device contains two independent supply-voltage supervisors that monitor the supplies for overvoltage and undervoltage conditions at the VSO and VSU terminals, respectively. When VCC attains the minimum voltage of 1 V during power up, the RESET\ output becomes active (low). As VCC approaches 3.5 V, the time-delay function activates, latching RESET and RESET\ active (high and low, respectively) for a time delay (td) after system voltages have achieved normal levels. Above VCC = 3.5 V, taking RESIN\ low activates the time-delay function during normal system-voltage levels. To ensure that the microcomputer system has reset, the outputs remain active until the voltage at VSU exceeds the threshold value, VIT+, for a time delay, which is determined by an external timing capacitor such that:
td 20 × 103 × capacitance

where td is in seconds and capacitance is in farads.

The overvoltage-detection circuit is programmable for a wide range of designs. During an overvoltage condition, an internal silicon-controlled rectifier (SCR) is triggered, providing 250-mA peak instantaneous current and 25-mA continuous current to the SCR gate drive terminal, which can drive an external high-current SCR gate or an overvoltage-warning circuit.

The TL7770C series is characterized for operation from 0°C to 70°C. The TL7770I series is characterized for operation from -40°C to 85°C.

The TL7770 is an integrated-circuit system supervisor designed for use as a reset controller in microcomputer and microprocessor power-supply systems. This device contains two independent supply-voltage supervisors that monitor the supplies for overvoltage and undervoltage conditions at the VSO and VSU terminals, respectively. When VCC attains the minimum voltage of 1 V during power up, the RESET\ output becomes active (low). As VCC approaches 3.5 V, the time-delay function activates, latching RESET and RESET\ active (high and low, respectively) for a time delay (td) after system voltages have achieved normal levels. Above VCC = 3.5 V, taking RESIN\ low activates the time-delay function during normal system-voltage levels. To ensure that the microcomputer system has reset, the outputs remain active until the voltage at VSU exceeds the threshold value, VIT+, for a time delay, which is determined by an external timing capacitor such that:
td 20 × 103 × capacitance

where td is in seconds and capacitance is in farads.

The overvoltage-detection circuit is programmable for a wide range of designs. During an overvoltage condition, an internal silicon-controlled rectifier (SCR) is triggered, providing 250-mA peak instantaneous current and 25-mA continuous current to the SCR gate drive terminal, which can drive an external high-current SCR gate or an overvoltage-warning circuit.

The TL7770C series is characterized for operation from 0°C to 70°C. The TL7770I series is characterized for operation from -40°C to 85°C.
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種類 タイトル 最新の英語版をダウンロード 日付
* データシート Dual Power-Supply Supervisors データシート (Rev. F) 1999年 7月 27日

購入と品質

記載されている情報：
  • RoHS
  • REACH
  • デバイスのマーキング
  • リード端子の仕上げ / ボールの原材料
  • MSL 定格 / ピーク リフロー
  • MTBF/FIT 推定値
  • 使用原材料
  • 認定試験結果
  • 継続的な信頼性モニタ試験結果
記載されている情報：
  • ファブの拠点
  • 組み立てを実施した拠点

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