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CDCE421A Folha de dados(PDF) 5 Page - Texas Instruments

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Nome de Peças CDCE421A
Descrição Electrónicos  Fully-Integrated, Wide Range, Low-Jitter Crystal Oscillator Clock Generator
Download  27 Pages
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

CDCE421A Folha de dados(HTML) 5 Page - Texas Instruments

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DEVICE INFORMATION
CE
NC
SDATA
NC
NC
NC
NC
VCC
VCC
NC
NC
NC
1
2
3
4
5
6
18
17
16
15
14
13
ThermalPad
(BottomSide)
CDCE421A
PIN DESCRIPTIONS
CDCE421A
www.ti.com..................................................................................................................................................................................................... SCAS873 – APRIL 2009
RGE PACKAGE
QFN-24
(TOP VIEW)
Table 1. CDCE421A Pin Descriptions
TERMINAL
TERMINAL
ESD
TYPE
DESCRIPTION
NAME
NO.
PROTECTION
Chip enable
CE = 1: enable the device and the outputs.
CE
1
I
Y
CE = 0: disable all current sources; in LVDS mode, LVDSP = LVDSN = Hi-Z;
in LVPECL mode, LVPECLP = LVPECLN = Hi-Z.
GND
8, 9
GND
Y
Ground
2, 4–6,
No connect
11–15,
Do not connect these pins. Leave them floating.
18–20, 23,24
High-speed negative differential LVPECL or LVDS outputs. (Outputs are
OUTN
7
O
Y
enabled by CE and selected by the EEPROM configuration registers.)
High-speed positive differential LVPECL or LVDS outputs. (Outputs are
OUTP
10
O
Y
enabled by CE and selected by the EEPROM configuration registers.)
SDATA
3
I
Y
Programming pin using TI proprietary interface protocol
VCC
16, 17
Power
Y
3.3-V power supply
In crystal input mode, connect XIN1 to one end of the crystal and XIN2 to the
XIN1
21
I
Y
other end of the crystal. In LVCMOS input single-ended driven mode, XIN1
XIN2
22
GND/NC
N
(pin 21) acts as an input reference, and XIN2 should connect to GND or it can
be left unconnected.
Copyright © 2009, Texas Instruments Incorporated
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