参数资料
型号: SI5327D-C-GMR
厂商: SILICON LABORATORIES
元件分类: 时钟产生/分配
英文描述: 243 MHz, PROC SPECIFIC CLOCK GENERATOR, QCC36
封装: 6 X 6 MM, ROHS COMPLIANT, MO-220VJJD, QFN-36
文件页数: 46/60页
文件大小: 715K
代理商: SI5327D-C-GMR
Si5327
50
Preliminary Rev. 0.4
4
LOS2
O
LVCMOS
CKIN2 Invalid Indicator.
This pin functions as a LOS alarm indicator for CKIN2 if
CK2_BAD_PIN
=1.
0 = CKIN2 present
1 = LOS on CKIN2
The active polarity can be changed by CK_BAD_POL. If
CK2_BAD_PIN
= 0, the pin tristates.
5, 10, 32
VDD
Supply
Supply.
The device operates from a 1.8, 2.5, or 3.3 V supply. Bypass capac-
itors should be associated with the following VDD pins:
50.1 F
10
0.1 F
32
0.1 F
A 1.0 F should also be placed as close to the device as is practical.
7
6
XB
XA
IAnalog
External Crystal or Reference Clock.
External crystal should be connected to these pins to use internal
oscillator based reference. Refer to the Si53xx Family Reference
Manual for interfacing to an external reference. External reference
must be from a high-quality clock source (TCXO, OCXO). Accepts
37–41 MHz crystal or reference clock, as determine by the RATE
pin setting.
8, 15, 31
GND
Supply
Ground.
Must be connected to system ground. Minimize the ground path
impedance for optimal performance of this device. Grounding these
pins does not eliminate the requirement to ground the GND PAD on
the bottom of the package.
11
RATE
I
3-Level
External Crystal or Reference Clock Rate.
Three level input that selects an external crystal or reference clock
to be applied to the XA/XB interface.
L setting (GND) = crystal on XA/XB
M setting (VDD/2) = clock or XO on XA/XB
H setting (VDD) = reserved
Some designs may require an external resistor voltage divider when
driven by an active device that will tristate.
16
17
CKIN1+
CKIN1–
IMulti
Clock Input 1.
Differential input clock. This input can also be driven with a single-
ended signal. Input frequency range is 2 kHz to 710 MHz.
12
13
CKIN2+
CKIN2–
IMulti
Clock Input 2.
Differential input clock. This input can also be driven with a single-
ended signal. Input frequency range is 2 kHz to 710 MHz.
Pin #
Pin Name
I/O
Signal Level
Description
Note:
Internal register names are indicated by underlined italics, e.g., INT_PIN. See Section “5.Register Map”.
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