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N84C161 Dataheets PDF



Part Number N84C161
Manufacturers ON Semiconductor
Logo ON Semiconductor
Description Serial EEPROM
Datasheet N84C161 DatasheetN84C161 Datasheet (PDF)

N84C161, N84C162 Supervisory Circuits with EEPROM Serial 16-Kb I2C Precision Reset Controller and Watchdog Timer (16K) Description The N84C161/2 is a complete memory and supervisory solution for microcontroller−based systems. A serial EEPROM memory (16K) with hardware memory write protection, a system power supervisor with brown out protection and a watchdog timer are integrated together in low power CMOS technology. Memory interface is via an I2C bus. The 1.6−second watchdog circuit returns a.

  N84C161   N84C161



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N84C161, N84C162 Supervisory Circuits with EEPROM Serial 16-Kb I2C Precision Reset Controller and Watchdog Timer (16K) Description The N84C161/2 is a complete memory and supervisory solution for microcontroller−based systems. A serial EEPROM memory (16K) with hardware memory write protection, a system power supervisor with brown out protection and a watchdog timer are integrated together in low power CMOS technology. Memory interface is via an I2C bus. The 1.6−second watchdog circuit returns a system to a known good state if a software or hardware glitch halts or “hangs” the system. The N84C161 watchdog monitors the SDA line, making an additional PC board trace unnecessary. The lower cost N84C162 does not have a watchdog timer. The power supply monitor and reset circuit protects memory and system controllers during power up/down and against brownout conditions. Five reset threshold voltages support 5 V, 3.3 V and 3 V systems. If power supply voltages are out of tolerance reset signals become active, preventing the system microcontroller, ASIC or peripherals from operating. Reset signals become inactive typically 200 ms after the supply voltage exceeds the reset threshold level. With both active high and low reset signals, interface to microcontrollers and other ICs is simple. In addition, a reset pin can be used as a debounced input for pushbutton manual reset capability. The N84C161/2 memory features a 16−byte page. In addition, hardware data protection is provided by a write protect pin WP and by a VCC sense circuit that prevents writes to memory whenever VCC falls below the reset threshold or until VCC reaches the reset threshold during power up. These devices are available in a green SOIC−8 package. www.onsemi.com SOIC−8 CASE 751BD PIN CONFIGURATION DC RESET WP GND 1 8 2 N84C161 7 3 N84C162 6 4 5 VCC RESET SCL SDA Pin Name DC RESET WP GND SDA SCL RESET PIN FUNCTIONS Function Do Not Connect Active Low Reset I/O Write Protect Ground Serial Data/Address Clock Input Active High Reset I/O Features • Watchdog Monitors SDA Signal (N84C161) • 400 kHz I2C Bus Compatible • 2.7 V to 6 V Operation • Low Power CMOS Technology • 16−Byte Page Write Buffer • Built−in Inadvertent Write Protection ♦ VCC Lock Out ♦ Write Protection Pin, WP • Active High or Low Reset ♦ Precision Power Supply Voltage Monitor ♦ 5 V, 3.3 V and 3 V Systems ♦ Five Threshold Voltage Options VCC Power Supply ORDERING INFORMATION For Ordering Information details, see page 11. • 1,000,000 Program/Erase Cycles • Manual Reset • 100 Year Data Retention • 8−Pin SOIC • Commercial and Industrial Temperature Ranges • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant © Semiconductor Components Industries, LLC, 2016 1 May, 2018 − Rev. 1 Publication Order Number: N84C161/D N84C161, N84C162 Table 1. RESET THRESHOLD OPTION Part Dash Number Minimum Thresh- Maximum Thresh- old old −45 4.50 4.75 −42 4.25 4.50 −30 3.00 3.15 −28 2.85 3.00 −25 2.55 2.70 EXTERNAL LOAD V CC GND BLOCK DIAGRAM D OUT ACK WORD ADDRESS BUFFERS SENSEAMPS SHIFT REGISTERS COLUMN DECODERS SDA WP STA RT/ STOP LOGIC CONTROL LOGIC XDEC 16K EEPROM DATA IN STORAGE HIGH VOLTAGE/ TIMING CONTROL RESET Controller STATE COUNTERS SCL Only for N84C161 WAT CH DO G Precision Vcc Monitor SLAVE ADDRESS COMPARATORS RESET RESET www.onsemi.com 2 N84C161, N84C162 SPECIFICATIONS Table 2. ABSOLUTE MAXIMUM RATINGS Parameters Ratings Units Temperature Under Bias –55 to +125 °C Storage Temperature –65 to +150 °C Voltage on any Pin with Respect to Ground (Note 1) VCC with Respect to Ground Package Power Dissipation Capability (TA = 25°C) Lead Soldering Temperature (10 sec) −2.0 to VCC + 2.0 V −2.0 to 7.0 V 1.0 W 300 °C Output Short Circuit Current (Note 2) 100 mA Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. The minimum DC input voltage is –0.5 V. During transitions, inputs may undershoot to –2.0 V for periods of less than 20 ns. Maximum DC voltage on output pins is VCC +0.5 V, which may overshoot to VCC +2.0 V for periods of less than 20 ns. 2. Output shorted for no more than one second. No more than one output shorted at a time. Table 3. RELIABILITY CHARACTERISTICS Symbol Parameter Reference Test Method Min Max NEND (Note 3) Endurance MIL−STD−883, Test Method 1033 1,000,000 TDR (Note 3) Data Retention MIL−STD−883, Test Method 1008 100 VZAP (Note 3) ESD Susceptibility MIL−STD−883, Test Method 3015 2000 ILTH (Notes 3 & 4) Latch−Up JEDEC Standard 17 100 3. This parameter is tested initially and after a design or process change that affects the parameter. 4. Latch−up protection is provided for stresses up to 1.


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