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參數資料
| 型號： | MPC998FA |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 時鐘及定時 |
| 英文描述： | 998 SERIES, PLL BASED CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP32 |
| 封裝： | LQFP-32 |
| 文件頁數： | 5/7頁 |
| 文件大?。?/td> | 286K |
| 代理商： | MPC998FA |
4
MPC998
MOTOROLA ADVANCED CLOCK DRIVERS DEVICE DATA
441
FUNCTION TABLE (CONTROLS)
Control Pin
0
1
REF_SEL
HSTL_CLK
PECL_CLK
TESTM
M divider test mode enabled
Reference fed to Bypass mux
PLLREF_EN
Disable the input to the PLL and
reset the M divider
Enable the input to the PLL
PLL_BYPASS
Outputs fed by input reference or
M divider
Outputs fed by VCO
EXTFB_EN
External feedback enabled
Internal feedback enabled
PCLK0_EN
PCLK0 = low, PCLK0 = high
PCLK0 = high, PCLK0 = low
PCLK1_EN
PCLK1 = low, PCLK1 = high
PCLK1 = high, PCLK1 = low
RESET
Resets feedback N divider
Feedback enabled
SEL[4:0]
See Selection Frequency Table
ABSOLUTE MAXIMUM RATINGS*
Symbol
Characteristics
Min
Max
Unit
Condition
VCC
Supply Voltage
-0.5
4.4
V
VCCO
Output Supply Voltage
-0.5
4.4
V
VIN
Input Voltage
-0.5
VCC+0.3
V
IIN
Input Current
-1
1
mA
TS
Storage temperature
-50
150
°C
NOTE: Absolute maximum continuous ratings are those maximum values beyond which damage to the device may occur. Exposure to these condi-
tions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute-maximum-rated con-
ditions is not implied.
DC CHARACTERISTICS (VCCA=VCCI = 3.3V ± 5%, VCCO = 1.7 to 2.1V, TA = 0 to 70°C)
Symbol
Characteristics
Min
Typ
Max
Unit
Condition
VIH
Input high voltage
2.0
VCCI
V
LVCMOS
VIL
Input low voltage
0.0
0.8
V
LVCMOS
VCMR
Input high voltagea
1
VCCI - 0.3
V
LVPECL
VPP
Input low voltagea
0.5
1
V
LVPECLb
VIN (dc)
DC input signal voltage
-0.3
1.45
V
HSTLc
VDIF(dc)
DC differential input voltage
0.4
1.75
V
HSTLd
VCM(dc)
DC common mode input voltage
0.4
1.0
V
HSTLe
VOH
Output High Voltage
VX + 0.3
VX + 0.5
1.4
V
HSTLf,a
VOL
Output Low Voltage
0.0
VX - 0.5
VX - 0.3
V
HSTLf
ICCI
Core Supply Current
140
mA
ICCA
PLL Supply Current
15
20
mA
ICCO
Output Supply Current
150
mA
Note g
ThetaJA
Junction to ambient thermal
resistance
53
°C/W
Note h
a) DC levels will vary 1:1 with VCC.
b) VPP minimum and maximum required to maintain AC specifications. Actual device function will tolerate minimum VPP of 200mV.
c) VIN (dc) specifies the maximum allowable dc excursion of each differential input.
d) VDIF (dc) specifies the minimum input differential voltage (VTR - VCP) required for switching, where VTR is the “true” input signal and VCP is
the “complement” input signal.
e) VCM(dc) specifies the maximum allowable range of input signal crosspoint voltage
f) VX is the differential output crosspoint voltage defined in the “AC CHARACTERISTICS” section
g)
2 PCLK into 25
and 1 EXTFB into 50
h)
Measured with 1.3M/s (250fpm) airflow
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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