Cypress Semiconductor CY7B991 Технический паспорт - Страница 2

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Pin Configuration

Pin Definitions

Signal Name
IO
REF
I
Reference frequency input. This input supplies the frequency and timing against which all functional
variations are measured.
FB
I
PLL feedback input (typically connected to one of the eight outputs).
FS
I
Three level frequency range select. See
1F0, 1F1
I
Three level function select inputs for output pair 1 (1Q0, 1Q1). See
2F0, 2F1
I
Three level function select inputs for output pair 2 (2Q0, 2Q1). See
3F0, 3F1
I
Three level function select inputs for output pair 3 (3Q0, 3Q1). See
4F0, 4F1
I
Three level function select inputs for output pair 4 (4Q0, 4Q1). See
TEST
I
Three level select. See
1Q0, 1Q1
O
Output pair 1. See
2Q0, 2Q1
O
Output pair 2. See
3Q0, 3Q1
O
Output pair 3. See
4Q0, 4Q1
O
Output pair 4. See
V
PWR
Power supply for output drivers.
CCN
V
PWR
Power supply for internal circuitry.
CCQ
GND
PWR
Ground.
Document Number: 38-07138 Rev. *B
PLCC/LCC
4
3
2
1
32 31 30
5
3F1
4F0
6
4F1
7
V
8
CCQ
CY7B991
V
9
CCN
CY7B992
4Q1
10
4Q0
11
GND
12
GND
13
14
15
16
17
18 19 20
Table
"Test Mode"
on page 4 under the
Table
2.
Table
2.
Table
2.
Table
2.
29
2F0
28
GND
27
1F1
26
1F0
25
V
CCN
24
1Q0
23
1Q1
22
GND
GND
21
Description
1.
Table
Table
Table
Table
"Block Diagram Description"
CY7B991
CY7B992
2.
2.
2.
2.
on page 3.
Page 2 of 19
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