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參數(shù)資料
| 型號(hào)： | TC1232EPA |
| 廠商： | TelCom Semiconductor, Inc. |
| 英文描述： | MICROPROCESSOR MONITOR |
| 中文描述： | 微處理器監(jiān)控 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 65K |
| 代理商： | TC1232EPA |
5-21
TELCOM SEMICONDUCTOR, INC.
7
6
5
4
3
1
2
8
AC ELECTRICAL CHARACTERISTICS: (Cont.
)
T
A
= T
MIN
to T
MAX
; V
CC
=
+5V
to +10%, unless otherwise
specified.
Symbol
Parameter
Test Conditions
Min
Typ
Max
Units
t
R
t
RPD
V
CC
Rise Time (Note 4)
V
CC
Detect to RST High
and RST Low
V
CC
Detect to RST High
and RST Open (Note 6)
Figure 6
Figure 7, V
CC
Falling
0
—
—
—
—
100
μ
sec
nsec
t
RPU
Figure 8, V
CC
Rising
250
610
1000
msec
PIN DESCRIPTION
Pin No.
(8-Pin PDIP) (8-Pin SOIC) (16-Pin SOIC) Symbol Description
Pin No.
Pin No.
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.
TD
Time Delay Set. The watchdog time-out select input (t
TD
= 150msec for
TD = 0V, t
TD
= 600msec for TD = open, t
TD
= 1.2sec for TD = V
CC
).
TOL
Tolerance Input. Connect to GND for 5% tolerance or to V
CC
for 10%
tolerance.
GND
Ground.
RST
Reset Output (Active High) - goes active:
1. If V
CC
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
RST
Reset Output (Active Low, Open Drain) - see RST.
ST
Strobe Input. Input for watchdog timer.
V
CC
The +5V Power-Supply Input.
NC
No Internal Connection.
2
2
4
3
3
6
4
5
4
5
8
9
6
7
8
6
7
8
11
13
15
1, 3, 5, 7, 10,
12, 14, 16
NOTES:
1. PB RST is internally pulled up to V
CC
with an internal impedance of typically 40k
.
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. t
R
= 5
μ
sec.
1
8
2
7
3
6
4
5
TC1232CPA
TC1232EPA
RST
RST
GND
TOL
TD
PB RST
RST
ST
V
CC
RST
ST
1
8
2
7
3
6
4
5
RST
GND
TOL
TD
PB RST
RST
ST
V
CC
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 CONFIGURATION
S
TC1232
MICROPROCESSOR MONITOR
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