Prescaler
DN8522S-A
Prescaler IC for CATV
s
Overview
The DN8522S-A is 1.7 GHz prescaler IC for CATV.
It is made up of ECL flip-flop circuit which can be
switched to the dividing ratios of 64, 128 or 256.
0.4±0.25
0.6±0.3
Unit: mm
1
8
5.0±0.3
s
Features
•
Power dissipation: 5 V, 26 mA
•
To be switched to the dividing ratios of 64, 128 and 256
•
ECL-level output
1.27
4
5
•
Television, VCR
0.1±0.1
0.3
4.2±0.3
6.5±0.3
SOP008-P-0225A
s
Block Diagram
V
CC
Input 1
Ref. 8
1/2
1/2
1/2
1/2
2 V
CC
1/2
1/2
1/4
½
Switch
1/8
4 Output
Buff. amp.
GND
3
6
GND
M1
M2
5
1.5±0.2
0.15
0.65
s
Applications
1
DN8522S-A
s
Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
Input pin
Supply voltage pin
Dividing ratio select pin: M1
Output pin
GND pin
Dividing ratio select pin: M2
N.C.
Bias (Ref.) pin
Description
Prescaler
s
Absolute Maximum Ratings
Parameter
Supply voltage
Supply current
Power dissipation
*2
Operating ambient temperature
*1
Storage temperature
*1
Symbol
V
CC
I
CC
P
D
T
opr
T
stg
Rating
6.0
40
160
−20
to
+80
−55
to
+125
Unit
V
mA
mW
°C
°C
Note) 1. *1: Except for the operating ambient temperature and storage temperature, all ratings are for T
a
=
25°C.
*2: The power dissipation shown is for the IC package at T
a
=
80°C
s
Recommended Operating Range
Parameter
Supply voltage
Symbol
V
CC
Range
4.5 to 5.5
Unit
V
s
Electrical Characteristics at T
a
=
25°C
Parameter
Supply voltage
Supply current
Input frequency
Input signal level
Output amplitude
High-level input voltage
Low-level input voltage
Symbol
V
CC
I
CC
f
IN
V
IN1
V
O
V
IH
V
IL
V
CC
=
5 V
V
CC
=
5.0 V, V
IN
= −15
dBm
V
CC
=
5.0 V, T
a
= −20°C
to 80°C
f
IN
=
0.6 GHz to 1.7 GHz
V
CC
=
5 V, f
IN
=
1.7 GHz
V
IN
= −10
dBm, divided by 64
Dividing ratio select voltage pin 3,
pin 6
Dividing ratio select voltage pin 3,
pin 6
Conditions
Min
4.5
0.6
−15
0.6
0.7
×
V
CC
Typ
5.0
26
1.0
Max
5.5
36
1.7
+3
1.6
0.2
×
V
CC
Unit
V
mA
GHz
dBm
V[p-p]
V
V
2
Prescaler
s
Application Circuit Example
DN8522S-A
Input 1
0.001
µF
Ref. 8
0.001
µF
1/2
1/2
1/2
1/2
2
V
CC
5 V
1/2
1/2
1/4
½
Switch
1/8
4 Output
Buff. amp.
3
6
M1
M2
Dividing ratio select pin: M1/M2 settings and related dividing ratios are as follows: High
=
V
CC
, Low
=
GND
Pin 3
M1
Low
Low
High
High
Pin 6
M2
Low
High
Low
High
1/64
Dividing ratio
1/256
1/128
GND
5
3
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