參數(shù)資料
型號(hào): MPC99J93
廠商: Motorola, Inc.
英文描述: Intelligent Dynamic Clock Switch (IDCS) PLL Clock Driver
中文描述: 智能動(dòng)態(tài)時(shí)鐘開關(guān)(IDC機(jī)房)PLL時(shí)鐘驅(qū)動(dòng)器
文件頁(yè)數(shù): 2/8頁(yè)
文件大?。?/td> 265K
代理商: MPC99J93
MPC99J93
MOTOROLA TIMING SOLUTIONS
2
Figure 2. 32--Lead Pinout
(Top View)
GND
V
Q
Q
Q
Q
Q
Q
V
M
A
C
C
S
C
C
G
25
26
27
28
29
30
31
32
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
16
MPC99J93
Ext_FB
Ext_FB
GND
Clk_Selected
Inp1bad
Inp0bad
VCC
PLL_En
Man_Override
VCC_PLL
VCC
Qa0
Qa0
Qa1
Qa1
Table 1. Pin Descriptions
Pin Name
I/O
Pin Definition
CLK0, CLK0
CLK1, CLK1
LVPECL Input
LVPECL Input
Differential PLL clock reference (CLK0 pulldown, CLK0 pullup)
Differential PLL clock reference (CLK1 pulldown, CLK1 pullup)
Ext_FB, Ext_FB
LVPECL Input
Differential PLL feedback clock (Ext_FB pulldown, Ext_FB pullup)
Qa0:1, Qa0:1
LVPECL Output
Differential 1x output pairs. Connect one QAx pair to Ext_FB.
Qb0:2, Qb0:2
LVPECL Output
Differential 2x output pairs
Inp0bad
LVCMOS Output
Indicates detection of a bad input reference clock 0 with respect to the feedback signal. The output
is active HIGH and will remain HIGH until the alarm reset is asserted
Inp1bad
LVCMOS Output
Indicates detection of a bad input reference clock 1 with respect to the feedback signal. The output
is active HIGH and will remain HIGH until the alarm reset is asserted
Clk_Selected
LVCMOS Output
‘0’ if clock 0 is selected, ‘1’ if clock 1 is selected
Alarm_Reset
LVCMOS Input
‘0’ will reset the input bad flags and align Clk_Selected with Sel_Clk. The input is “one--shotted”
(50k
pullup)
Sel_Clk
LVCMOS Input
‘0’ selects CLK0, ‘1’ selects CLK1 (50k
pulldown)
Manual_Override
LVCMOS Input
‘1’ disables internal clock switch circuitry (50k
pulldown)
PLL_En
LVCMOS Input
‘0’ bypasses selected input reference around the phase--locked loop (50k
pullup)
MR
LVCMOS Input
‘0’ resets the internal dividers forcing Q outputs LOW. Asynchronous to the clock (50k
pullup)
VCCA
Power Supply
PLL power supply
VCC
Power Supply
Digital power supply
GNDA
Power Supply
PLL ground
GND
Power Supply
Digital ground
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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