STM6821LAWY6E(2007) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM6821LAWY6E
(Rev.:2007)

5-pin Supervisor with watchdog timer and push-button reset

STMicroelectronics 

STM6321/6322STM6821/6822/6823/6824/6825

DC and AC parameters

Sym

Alter-

native

Description

Test Condition (1)

Min Typ Max Unit

Reset Thresholds

VRST(5)

trec (7)

Reset Threshold

Reset Threshold Hysteresis

VCC to RST Delay

(VRST – VCC = 100mV, VCC

falling at 1mV/µs)

Reset Pulse Width

Reset Threshold

Temperature Coefficient

STM6xxxL

25°C

4.561 4.630 4.699 V

–40 to 85°C 4.514

4.746 V

STM6xxxM

25°C

4.314 4.390 4.446 V

–40 to 85°C 4.270

4.490 V

STM6xxxT

25°C

3.040 3.080 3.110 V

–40 to 85°C 3.000

3.150 V

STM6xxxS

25°C

2.890 2.930 2.960 V

–40 to 85°C 2.857

3.000 V

STM6xxxR

25°C

2.590 2.630 2.660 V

–40 to 85°C 2.564

2.696 V

STM6xxxZ (6)

25°C

2.280 2.320 2.350 V

–40 to 85°C 2.250

2.380 V

L/M versions

10

mV

T/S/R/Z versions

5

mV

20

µs

A

Blank

J

1

1.4

2 ms

140 200 280 ms

240 280 480 ms

40

ppm

/°C

Push-button Reset Input

tMLMH

tMLRL

tMR

tMRD

MR Pulse Width

MR to RST Output Delay

MR Glitch Immunity

MR Pull-up Resistor

1

µs

500

ns

100

ns

35

52

75 kΩ

Watchdog Timer

tWD (7)

Watchdog Timeout Period

WDI Pulse Width

1.12 1.60 2.24 s

50

ns

1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 4.5 to 5.5V for “L/M” versions; VCC = 2.7 to 3.6V for

“T/S/R” versions; and VCC = 2.1 to 2.75V for “Z” version (except where noted).

2. VCC (min) = 1.0V for TA = 0 to +85°C.

3. WDI input is designed to be driven by a three-state output device. To float WDI, the “high-impedance mode” of the output

device must have a maximum leakage current of 10µA and a maximum output capacitance of 200pF. The output device

must also be able to source and sink at least 200µA when active.

4. WDI is internally serviced within the watchdog period if WDI is left unconnected.

5. The leakage current measured on the RST pin is tested with the reset asserted (output high impedance).

6. Contact local sales office for availability.

7. Other trec and watchdog timings are offered. Minimum order quantities may apply. Contact local sales office for availability.

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