TLC77

現行

具有可編程延遲時間的電壓監控器

立即訂購

產品規格表

document-pdfAcrobat MicroPower Supply Voltage Supervisors. datasheet (Rev. M) (英文)

TLC77

現行

產品規格表

立即訂購

產品詳細資料

Number of supplies monitored

1

Threshold voltage 1 (typ) (V)

1.1, 2.25, 2.63, 2.93, 4.55

Features

Complimentary output, Latching, Manual reset capable, Reset time delay, Separate VDD & sense

Reset threshold accuracy (%)

5.4

Iq (typ) (mA)

0.009

Output driver type/reset output

Active-high, Active-low, Push-Pull

Supply voltage (min) (V)

2

Supply voltage (max) (V)

6

Rating

Catalog

Watchdog timer WDI (s)

None

Operating temperature range (°C)

-40 to 125

Number of supplies monitored

1

Threshold voltage 1 (typ) (V)

1.1, 2.25, 2.63, 2.93, 4.55

Features

Complimentary output, Latching, Manual reset capable, Reset time delay, Separate VDD & sense

Reset threshold accuracy (%)

5.4

Iq (typ) (mA)

0.009

Output driver type/reset output

Active-high, Active-low, Push-Pull

Supply voltage (min) (V)

2

Supply voltage (max) (V)

6

Rating

Catalog

Watchdog timer WDI (s)

None

Operating temperature range (°C)

-40 to 125

PDIP (P)

8

92.5083 mm² 9.81 x 9.43

SOIC (D)

8

29.4 mm² 4.9 x 6

TSSOP (PW)

8

19.2 mm² 3 x 6.4

VSON (DRB)

8

9 mm² 3 x 3

Power-On Reset Generator
Automatic Reset Generation After Voltage Drop
Precision Voltage Sensor
Temperature-Compensated Voltage Reference
Programmable Delay Time by External Capacitor
Supply Voltage Range . . . 2 V to 6 V
Defined RESET Output from V_DD ≥ 1 V
Power-Down Control Support for Static RAM With Battery Backup
Maximum Supply Current of 16 µA
Power Saving Totem-Pole Outputs
Temperature Range . . . Up to –55°C to 125°C

Power-On Reset Generator
Automatic Reset Generation After Voltage Drop
Precision Voltage Sensor
Temperature-Compensated Voltage Reference
Programmable Delay Time by External Capacitor
Supply Voltage Range . . . 2 V to 6 V
Defined RESET Output from V_DD ≥ 1 V
Power-Down Control Support for Static RAM With Battery Backup
Maximum Supply Current of 16 µA
Power Saving Totem-Pole Outputs
Temperature Range . . . Up to –55°C to 125°C

The TLC77xx family of micropower supply voltage supervisors provide reset control, primarily in microcomputer and microprocessor systems.

During power-on, RESET is asserted when V_DD reaches 1 V. After minimum V_DD (≥ 2 V) is established, the circuit monitors SENSE voltage and keeps the reset outputs active as long as SENSE voltage (V_I(SENSE)) remains below the threshold voltage. An internal timer delays return of the output to the inactive state to ensure proper system reset. The delay time, t_d, is determined by an external capacitor:

t_d = 2.1 × 10⁴ × C_T

Where

C_T is in farads
t_d is in seconds

Except for the TLC7701, which can be customized with two external resistors, each supervisor has a fixed sense threshold voltage set by an internal voltage divider. When SENSE voltage drops below the threshold voltage, the outputs become active and stay in that state until SENSE voltage returns above threshold voltage and the delay time, t_d, has expired.

In addition to the power-on-reset and undervoltage-supervisor function, the TLC77xx adds power-down control support for static RAM. When CONTROL is tied to GND, RESET will act as active high. The voltage monitor contains additional logic intended for control of static memories with battery backup during power failure. By driving the chip select (CS) of the memory circuit with the RESET output of the TLC77xx and with the CONTROL driven by the memory bank select signal (CSH1) of the microprocessor, the memory circuit is automatically disabled during a power loss. (In this application the TLC77xx power has to be supplied by the battery.)

The TLC77xxI is characterized for operation over a temperature range of –40°C to 85°C; the TLC77xxQ is characterized for operation over a temperature range of –40°C to 125°C; and the TLC77xxM is characterized for operation over the full Military temperature range of –55°C to 125°C.

The 3×3 mm DRB package is also available as a non-magnetic package for medical imaging application.

The TLC77xx family of micropower supply voltage supervisors provide reset control, primarily in microcomputer and microprocessor systems.

During power-on, RESET is asserted when V_DD reaches 1 V. After minimum V_DD (≥ 2 V) is established, the circuit monitors SENSE voltage and keeps the reset outputs active as long as SENSE voltage (V_I(SENSE)) remains below the threshold voltage. An internal timer delays return of the output to the inactive state to ensure proper system reset. The delay time, t_d, is determined by an external capacitor:

t_d = 2.1 × 10⁴ × C_T

Where

C_T is in farads
t_d is in seconds

Except for the TLC7701, which can be customized with two external resistors, each supervisor has a fixed sense threshold voltage set by an internal voltage divider. When SENSE voltage drops below the threshold voltage, the outputs become active and stay in that state until SENSE voltage returns above threshold voltage and the delay time, t_d, has expired.

In addition to the power-on-reset and undervoltage-supervisor function, the TLC77xx adds power-down control support for static RAM. When CONTROL is tied to GND, RESET will act as active high. The voltage monitor contains additional logic intended for control of static memories with battery backup during power failure. By driving the chip select (CS) of the memory circuit with the RESET output of the TLC77xx and with the CONTROL driven by the memory bank select signal (CSH1) of the microprocessor, the memory circuit is automatically disabled during a power loss. (In this application the TLC77xx power has to be supplied by the battery.)

The TLC77xxI is characterized for operation over a temperature range of –40°C to 85°C; the TLC77xxQ is characterized for operation over a temperature range of –40°C to 125°C; and the TLC77xxM is characterized for operation over the full Military temperature range of –55°C to 125°C.

The 3×3 mm DRB package is also available as a non-magnetic package for medical imaging application.

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