Description

STM6502, STM6503, STM6504, STM6505

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Doc ID 16101 Rev 5

The STM65xx devices have active-low (optionally active-high) open-drain reset (RST)

output(s) with or without internal pull-up resistor or push-pull as output options, with factory-

programmed or capacitor-adjustable or push-buttons defined output reset pulse duration,

with or without power-on reset function.

Some devices also have an undervoltage monitoring feature: the reset output is also

voltage goes above the specified threshold.

Figure 1.

Logic diagrams

Figure 2.

Pin connections

AM00378

VCC

SR0

RST

VSS

STM6502

SR1

SR0

SR1

SRC

VCC

RST

VSS

STM6503

VCC

RST

VSS

STM6504

SR0

SRE

VCC

BLD

RST

VSS

STM6505

SR1

SR0

SRC

VBAT

TSR

TSR

AM00379

SRC

NC

NC

1

2

3

STM

6502

4

8

7

6

5

RST

VSS

VCC

SR1

SR0

TSR

NC

NC

1

2

3

STM

6503

4

8

7

6

5

RST

VSS

VCC

SR0

SR1

TSR

NC

NC

1

2

3

STM

6504

4

8

7

6

5

RST

VSS

VCC

SRE

SR0

BLD

SRC

VBAT

1

2

3

STM

6505

4

8

7

6

5

RST

VSS

VCC

SR1

SR0