STM1816RWX7F Datasheet STM1810MWX7F, STM1816TWX7F, STM1816RWX7F | P1-P3

September 2010 Doc ID11464 Rev 8 1/25

STM1810 STM1811 STM1812 STM1813

STM1815 STM1816 STM1817 STM1818

Low power reset circuit

Features

■ Precision monitoring of 3 V, 3.3 V, and 5 V

supply voltages

■ Four output configurations:

– Push-pull, active-high (STM1812,1817)

– Push-pull, active-low (STM1810,1815)

– Open-drain, active-low (STM1811,1816)

– Open-drain, active-low with push-button

detect (STM1813,1818)

■ Reset pulse width - 100 ms (min.)

■ Low supply current - 4 µA (typ.)

■ Guaranteed assertion down to V

= 1.0 V

(0 °C to 105 °C)

■ Factory-trimmed reset thresholds of 2.55 V,

2.88 V, 3.06 V, 4.37 V, and 4.62 V (typ.)

■ Power supply transient immunity

■ Push-button/manual reset detect

(STM1813/1818)

■ Operating temperature: –40 °C to 105 °C

■ ± 2.5% reset threshold accuracy:

(–40 °C to 105 °C)

■ Available in the SOT23-3 package

■ Fully compatible with DS181x and MXD181x

products.

SOT23-3 (WX)

Table 1. Device summary

Order codes 5 V

3.3 V/

3.0 V

Active-low

reset

(push-pull)

Active-low

reset

(open-drain)

Active-high

reset

(push-pull)

Active-low reset

(open-drain,

bidirectional, with MR

detect)

STM1810L/M ✔✔

STM1811L/M ✔✔

(1)

STM1812L/M ✔✔

STM1813L/M ✔ ✔

STM1815T/S/R ✔✔

STM1816T/S/R ✔✔

(1)

STM1817T/S/R ✔✔

STM1818T/S/R ✔✔

1. Active-low RST with internal pull-up resistor.

www.st.com

Contents STM1810/1811/1812/1813/1815/1816/1817/1818

2/25 Doc ID11464 Rev 8

Contents

1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.1 Functional block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.2 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.2.1 Active-low RST output (push-pull) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.2.2 Active-low RST

output (open-drain) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.2.3 Active-high RST output (push-pull) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.2.4 Active-low RST

output (open-drain with internal 5.5 kΩ pull-up) with

manual reset detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.2.5 V

CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.2.6 V

SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.1 Reset output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2 Push-button detect reset (STM1813/1818) . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3 Interfacing to bidirectional microcontrollers (MCU’s) . . . . . . . . . . . . . . . . . 9

2.4 Negative going V

transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.5 Valid RST

output down to V

= 0 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3 Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6 Package mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.1 ECOPACK

® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

7 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

STM1810/1811/1812/1813/1815/1816/1817/1818 List of tables

Doc ID11464 Rev 8 3/25

List of tables

Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table 2. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Table 3. STM1810/STM1815 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 4. STM1811/STM1816 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 5. STM1812/STM1817 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 6. STM1813/STM1818 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 7. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 8. Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 9. DC and AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 10. SOT23-3 – 3-lead small outline transistor package mechanical data. . . . . . . . . . . . . . . . . 21

Table 11. Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 12. Marking description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 13. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P25

STM1816RWX7F

Mfr. #:

Buy STM1816RWX7F

Manufacturer:

STMicroelectronics

Description:

Supervisory Circuits 2.55VRST Active Low Open Drain reset

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

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STM1816RWX7F

STM1816RWX7F

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