MPC992 查看數據表（PDF） - Motorola => Freescale
零件编号
产品描述 (功能)
生产厂家
MPC992 Datasheet PDF : 8 Pages
| |||
MPC992
Qa1
Qa1
Qa0
Qa0
GNDA
VCCA
Reset
VCCI
24 23 22 21 20 19 18 17
25
16
26
15
27
14
28
13
MPC992
29
12
30
11
31
10
32
9
12345678
Qb0
Qb0
Qb1
Qb1
Qb2
Qb2
PLL_EN
GNDI
FUNCTION TABLE 1
FSEL0 FSEL1
Qa
0
0
VCO/4
0
1
VCO/2
1
0
VCO/4
1
1
VCO/2
Qb
VCO/6
VCO/4
VCO/10
VCO/6
Feedback
VCO/24
VCO/16
VCO/40
VCO/24
Ratio
3:2
2:1
5:2
3:1
INPUT vs OUTPUT FREQUENCY
FSEL0 FSEL1
Qa
Qb
0
0
6 (fref)
4 (fref)
0
1
8 (fref)
4 (fref)
1
0
10 (fref) 4 (fref)
1
1
12 (fref) 4 (fref)
Int Feedback
fref
fref
fref
fref
FUNCTION TABLE 2
Control Signal
Logic ‘0’
Reset
XTAL_SEL
PLL_EN
VCO_SEL
Outputs Enabled
PECL REF
Disabled
High Frequency
Logic ‘1’
Outputs Disabled
XTAL REF
Enabled
Low Frequency
PIN DESCRIPTION
Pin Name
Function
VCO_SEL
VCO range select pin (Int Pullup)
PLL_EN
PLL bypass select pin (Int Pullup)
XTAL_SEL
Input reference source select pin (Int Pullup)
XTAL1:2
Crystal interface pins for the internal oscillator
PECL_CLK True PECL reference clock input (Int Pulldown)
PECL_CLK
Compliment PECL reference clock input
(Int Pullup)
FSELn
Internal divider select pins (Int Pullup)
RESET
Internal flip–flop reset, true outputs go LOW
(Int Pulldown)
MOTOROLA
2
TIMING SOLUTIONS
BR1333 — REV 5
Share Link: 