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HEF4521B Datasheet(PDF) 4 Page - NXP Semiconductors

Part # HEF4521B
Description  24-stage frequency divider and oscillator
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

HEF4521B Datasheet(HTML) 4 Page - NXP Semiconductors

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HEF4521B_5
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 5 November 2009
4 of 17
NXP Semiconductors
HEF4521B
24-stage frequency divider and oscillator
6.
Pinning information
6.1 Pinning
6.2 Pin description
7.
Count capacity
Fig 4.
Pin configuration
HEF4521B
Q24
VDD
MR
Q23
VSS1
Q22
Y2
Q21
VDD1
Q20
A2
Q19
Y1
Q18
VSS
A1
001aae709
1
2
3
4
5
6
7
8
10
9
12
11
14
13
16
15
Table 2.
Pin description
Symbol
Pin
Description
MR
2
master reset input
VSS1
3
ground supply voltage 1
VDD1
5
supply voltage 1
Y1, Y2
7, 4
external oscillator connection
VSS
8
ground supply voltage
A1, A2
9, 6
external oscillator connection
Q18 to Q24
10, 11, 12, 13, 14, 15, 1
output
VDD
16
supply voltage
Table 3.
Count capacity
Output
Count capacity
Q18
218 = 262144
Q19
219 = 524288
Q20
220 = 1048576
Q21
221 = 2097152
Q22
222 = 4194304
Q23
223 = 8388608
Q24
224 = 16777216


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