6 Reference Information
SAM4S ER-5200 Series
6-7
6-1 Semiconductor Base Diagram
6-1-4 Other ICs
Figure 6-13 SSCG FS781 Specification
Figure 6-14 VFD Driver UDN5812 Specification
4
5
6
7
8
9
10
19
20
21
22
23
24
25
LOAD
SUPPLY
BB
V
OUT
2
OUT
7
OUT
8
OUT
19
OUT
18
OUT
13
12
13
14
27
28
17
18
SERIAL
DATA O UT
BLANKING
LOGIC
SUPPLY
STROBE
GROUND
CLOCK
CLK
ST
BLNK
OUT
9
OUT
10
OUT
12
OUT
11
11
LAT
CH
ES
R
EGISTE
R
R
EGISTE
R
LAT
CH
ES
2
3
2
6
27
28
SERIAL
DATA I N
OUT
6
OUT
1
OUT
4
OUT
3
OUT
20
1
15
16
OUT
5
OUT
17
OUT
16
OUT
15
OUT
14
DD
V
MOS
BIPOLAR
OUT
1
OUT
2
GROUND
D
wg. FP -013-1
OUT
3
OUT
N
CLOCK
SERIAL
DATA I N
STROBE
BLANKING
SERIAL
DATA O UT
SERIAL-PARALLEL S HIFT REGISTER
LATCHES
V
DD
V
BB
LOGIC
SUPPLY
LOAD
SUPPLY
Refer to page 12 for package dimensions.
Pin Description
Pin No.
Pin Name
I/O
TYPE
Description
1/2
Xin / Xout
I/O
Analog
Pins form an on-chip reference oscillator when connected to
terminals of an external parallel resonant crystal. Xin may be
connected to TTL/CMOS external clock source. If Xin
connected to external clock other than crystal, leave Xout (pin 2)
unconnected.
7/3
S0 / S1
I
CMOS/TTL
Digital control inputs to select input frequency range and output
frequency scaling. Refer to Tables 7 & 8 for selection. S0 has
internal pulldown. S1 has internal pullup.
4
LF
I
Analog
Loop Filter. Single ended tri-state output of the phase detector. A
two-pole passive loop filter is connected to Loop Filter (LF).
6
FSOUT
O
CMOS/TTL
Modulated Clock Frequency Output. The center frequency is the
same as the input reference frequency for FS781. Input
frequency is multiplied by 2x and 4x for FS782 and FS784
respectively.
8
VDD
P
Power
Positive Power Supply.
5
VSS
P
Power
Power Supply Ground
Table 1
Output Frequency Selection
Product Number
FSOUT Frequency Scaling
Description
FS781
1x
1x Modulated Frequency of Input Clock
FS782
2x
2x Modulated Frequency of Input Clock
FS784
4x
4x Modulated Frequency of Input Clock
Table 2. FSOUT SSCG (Modulated Output Clock) Product Selection
1
2
3
4
8
7
6
5
S0
VDD
Xin
Xout
FSOUT
VSS
LF
S1
FS78x
8 Pin TSSOP Package
1
2
3
4
8
7
6
5
Xin
Xout
S1
LF
VDD
S0
FSOUT
VSS
FS78x
8 Pin SOIC Package
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