VCC Q1 Q2
參數(shù)資料
型號: NB3N853531EDTR2G
廠商: ON Semiconductor
文件頁數(shù): 2/9頁
文件大?。?/td> 0K
描述: IC FANOUT BUFFER LVPECL 20TSSOP
標(biāo)準(zhǔn)包裝: 2,500
類型: 扇出緩沖器(分配),多路復(fù)用器
電路數(shù): 1
比率 - 輸入:輸出: 2:4
差分 - 輸入:輸出: 無/是
輸入: LVCMOS,LVTTL,晶體
輸出: LVPECL
頻率 - 最大: 266MHz
電源電壓: 3.135 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 20-TSSOP
包裝: 帶卷 (TR)
NB3N853531E
http://onsemi.com
2
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Q0
VCC
Q1
Q2
VCC
Q3
VEE
CLK_EN
CLK_SEL
nc
XTAL_IN
XTAL_OUT
nc
VCC
CLK
Figure 2. Pinout Diagram (Top View)
Table 1. PIN DESCRIPTION
Pin
Name
I/O
Open De-
fault
Description
1
VEE
Negative (Ground) Power Supply pin must be externally connected to
power supply to guarantee proper operation.
2
CLK_EN
LVCMOS /
LVTTL
Pullup
Synchronized Clock Enable when HIGH. When LOW, outputs are
disabled (Qx HIGH, Qx LOW)
3
CLK_SEL
LVCMOS /
LVTTL
Pulldown
Clock Input Select (HIGH selects crystal, LOW selects CLK input)
4
CLK
LVCMOS /
LVTTL
Pulldown
Clock Input. Float open when unused.
5, 8, 9
nc
No Connect
6
XTAL_IN
Crystal
Crystal Oscillator Input (used with pin 7). Float open when unused.
7
XTAL_OUT
Crystal
Crystal Oscillator Output (used with pin 6). Float open when unused.
10, 13, 18
VCC
Positive Power Supply pins must be externally connected to power
supply to guarantee proper operation.
11, 14, 16,
19
Q[3:0]
LVPECL
Complement Differential Outputs (See AND8020 for termination)
12, 15, 17,
20
Q[3:0]
LVPECL
True Differential Outputs (See AND8020 for termination)
Table 2. FUNCTIONS
Inputs
Outputs
CLK_EN
CLK_SEL
Input Function
Output Function
Qx
0
CLK input selected
Disabled
LOW
HIGH
0
1
Crystal Inputs Selected
Disabled
LOW
HIGH
1
0
CLK input selected
Enabled
CLK0
Invert of
CLK1
1
Crystal Inputs Selected
Enabled
CLK1
Invert of
CLK1
1. After CLK_EN switches, the clock outputs are disabled or enabled following a rising and falling input clock edge as show in Figure 3.
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