5-21

TELCOM SEMICONDUCTOR, INC.

7

6

5

4

3

1

2

8

specified.

Symbol

Parameter

Test Conditions

Min

Typ

Max

Units

Figure 6

0

—

—

µsec

—

—

100

nsec

and RST Low

250

610

1000

msec

and RST Open (Note 6)

PIN DESCRIPTION

Pin No.

Pin No.

Pin No.

(8-Pin PDIP) (8-Pin SOIC) (16-Pin SOIC) Symbol Description

1

1

2

PB RST Push-button Reset Input. A debounced active-low input that ignores

pulses less than 1msec in duration and is guaranteed to recognize inputs

of 20msec or greater.

2

2

4

TD

3

3

6

TOL

tolerance.

4

4

8

GND

Ground.

5

5

9

RST

Reset Output (Active High) - goes active:

2. If PB RST is forced low

3. If ST is not strobed within the minimum time-out period

4. During power-up

6

6

11

RST

Reset Output (Active Low, Open Drain) - see RST.

7

7

13

ST

Strobe Input. Input for watchdog timer.

88

15

The +5V Power-Supply Input.

1, 3, 5, 7, 10,

NC

No Internal Connection.

12, 14, 16

2. Measured with outputs open.

3. All voltages referenced to GND.

4. Guaranteed by design.

5. PB RST must be held low for a minimum of 20msec to guarantee a reset.

1

8

2

7

3

6

4

5

TC1232CPA

TC1232EPA

RST

RST

GND

TOL

TD

PB RST

RST

ST

RST

ST

18

27

36

45

RST

GND

TOL

TD

PB RST

RST

ST

PB RST

TC1232COA

TC1232EOA

V

1

2

3

4

5

6

7

8

16

13

12

11

10

9

NC

TD

NC

NC

15

14

TOL

GND

NC

NC

NC

TC1232COE

TC1232EOE

NC

CC

NC

16-Pin SOIC Wide

8-Pin PDIP

8-Pin SOIC

PIN CONFIGURATIONS

TC1232

MICROPROCESSOR MONITOR