I1819H-08ST
| Model | I1819H-08ST |
| Description | Low Power Mobile VGA EMI Reduction IC |
| PDF file | Total 8 pages (File size: 61K) |
| Chip Manufacturer | ALSC |
P1818/19/20/21/22
®
Frequency vs. Deviation (P1818A and P1818H)
Deviation in P1818A
Frequency
SRS = 1
10 MHz
15 MHz
20 MHz
-4.4%
-1.8%
-0.8%
SRS = 0
-3.3%
-1.26%
-0.6%
D_C = 1
-4.4%
-1.8%
-0.8%
D_C = 0
±2.2%
±0.9%
±0.4%
Deviation in P1818H
Pin Description
Pin
number
1
2
3
Name
XIN
VSS
SRS
Type
I
P
I
Description
Connect to externally generated clock signal or crystal.
Ground Connection. Connect to system ground.
Spread Range Select. Digital logic input used to select frequency devi-
ation (see Spread Deviation Selections). This pin has an internal pull-
up resistor.
Digital logic input used to select Down (LOW) or Center (HIGH) Spread
Options (see Spread Deviation Selections). This pin has an internal
pull-up resistor.
Spread Spectrum clock output (see Input Frequency and Modulation
Rate Selections and Spread Deviation Selections).
Non-modulated reference output clock of the input frequency.
Frequency Range Select. Digital logic input used to select input fre-
quency range (see Input Frequency and Modulation Rate Selections).
This pin has an internal pull-up resistor.
Power-Down control pin. Pull LOW to enable Power-Down mode. This
pin has an internal pull-up resistor.
Connect to +3.3V
Connect to crystal. No connect if externally generated clock signal is
used.
Modulation Rate Select. Digital logic input used to select Modulation
Rate (see Spread Deviation Selections). This pin has an internal pull-
up resistor.
3
1
D_C
I
4
5
5/6
1
ModOut
REF
FRS
O
O
I
6
1
7
8
8
1
PD#
VDD
XOUT
MRS
I
P
I
I
1. Please refer to Figure 1 for pin assignment.
March 2003
Low Power Mobile VGA EMI Reduction IC
Notice: The information in this document is subject to change without notice.
4 of 8
