TC4521BP
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC4521BP
TC4521BP 24-Stage Frequency Divider
TC4521BP is frequency divider consisting of 24 stages of
flip-flop. The input section is equipped with an inverter to enable
to use either RC oscillator circuit or crystal oscillator circuit and
to accept pulse from external clock source.
Each flip-flop is inverted by the falling edge of the output of
previous stage flip-flop and this can count up to the maximum of
2
24
= 16,777,216.
Since six outputs, 2
18
, 2
19
, 2
20
, 2
21
, 2
22
, and 2
23
are available
besides of 2
24
, adjustment of frequency divided output can be
achieved.
Weight: 1.00 g (typ.)
Pin Assignment
Count Capacity
Output
Q18
Q19
Q20
Q21
Q22
Q23
Q24
Count Capacity
2
=
262,144
2
=
524,288
2
=
1,048,576
2
=
2,097,152
2
=
4,194,304
2
=
8,388,608
2
=
16,777,216
24
23
22
21
20
19
18
1
2007-10-01
TC4521BP
Absolute Maximum Ratings (Note)
Characteristics
DC supply voltage
Input voltage
Output voltage
DC input current
Power dissipation
Operating temperature range
Storage temperature range
Symbol
V
DD
1
V
DD
2
V
IN
V
OUT
I
IN
P
D
T
opr
T
stg
Rating
V
SS
1
−
0.5~V
SS
1
+
20
V
SS
1
−
0.5~V
DD
1
+
0.5
V
SS
1
−
0.5~V
DD
1
+
0.5
V
SS
1
−
0.5~V
DD
1
+
0.5
±10
300
−40~85
−65~150
Unit
V
V
V
mA
mW
°C
°C
Note:
Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or
even destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
Operating Ranges
(V
SS
1
=
V
SS
2
=
0 V) (Note)
Characteristics
DC supply voltage
Input voltage
Symbol
V
DD
1, V
DD
2
V
IN
Test Condition
⎯
⎯
Min
3
0
Typ.
⎯
⎯
Max
18
V
DD
1
Unit
V
V
Note:
The operating ranges must be maintained to ensure the normal operation of the device.
Unused inputs must be tied to either V
DD
or V
SS
.
4
2007-10-01
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