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TC1232COA Datasheet(PDF) 3 Page - TelCom Semiconductor, Inc

No. de pieza TC1232COA
Descripción Electrónicos  MICROPROCESSOR MONITOR
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Fabricante Electrónico  TELCOM [TelCom Semiconductor, Inc]
Página de inicio  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC1232COA Datasheet(HTML) 3 Page - TelCom Semiconductor, Inc

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TELCOM SEMICONDUCTOR, INC.
7
6
5
4
3
1
2
8
AC ELECTRICAL CHARACTERISTICS: (Cont.) TA = TMIN to TMAX; VCC = +5V to +10%, unless otherwise
specified.
Symbol
Parameter
Test Conditions
Min
Typ
Max
Units
tR
VCC Rise Time (Note 4)
Figure 6
0
µsec
tRPD
VCC Detect to RST High
Figure 7, VCC Falling
100
nsec
and RST Low
tRPU
VCC Detect to RST High
Figure 8, VCC Rising
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
Time Delay Set. The watchdog time-out select input (tTD = 150msec for
TD = 0V, tTD = 600msec for TD = open, tTD = 1.2sec for TD = VCC).
3
3
6
TOL
Tolerance Input. Connect to GND for 5% tolerance or to VCC for 10%
tolerance.
4
4
8
GND
Ground.
5
5
9
RST
Reset Output (Active High) - goes active:
1. If VCC falls below the selected reset voltage threshold
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
VCC
The +5V Power-Supply Input.
1, 3, 5, 7, 10,
NC
No Internal Connection.
12, 14, 16
NOTES: 1. PB RST is internally pulled up to VCC with an internal impedance of typically 40kΩ.
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.
6. tR = 5µsec.
1
8
2
7
3
6
4
5
TC1232CPA
TC1232EPA
RST
RST
GND
TOL
TD
PB RST
RST
ST
VCC
RST
ST
18
27
36
45
RST
GND
TOL
TD
PB RST
RST
ST
VCC
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


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