CDCE706
SCAS815I–OCTOBER 2005–REVISED NOVEMBER 2008........................................................................................................................................... www.ti.com
RECOMMENDED CRYSTAL SPECIFICATIONS
MIN NOM
MAX
54
UNIT
MHz
Ω
fXtal
ESR Effective series resistance(1)(2)
CIN Input capacitance CLK_IN0 and CLK_IN1
Crystal input frequency range (fundamental mode)
8
27
15
60
3
pF
(1) For crystal frequencies above 50 MHz, the effective series resistor should not exceed 50 Ω to assure stable start-up condition.
(2) For maximum power handling (drive level), see Figure 15.
EEPROM SPECIFICATION
MIN
100
10
TYP
MAX
UNIT
Cycles
Years
EEcyc
EEret
Programming cycles of EEPROM
Data retention
1000
TIMING REQUIREMENTS
over recommended ranges of supply voltage, load, and operating-free air temperature
MIN NOM MAX UNIT
CLK_IN REQUIREMENTS
PLL mode
1
0
200
200
4
fCLK_IN
CLK_IN clock input frequency (LVCMOS or differential)
MHz
ns
PLL bypass mode
tr/tf
Rise and fall time, CLK_IN signal (20% to 80%)
Duty cycle, CLK_IN at VCC/2
dutyREF
40%
60%
SMBus TIMING REQUIREMENTS (see Figure 11)
fSCLK
SCLK frequency
100
50
kHz
µs
µs
µs
µs
µs
µs
th(START)
tw(SCLL)
tw(SCLH)
tsu(START)
th(SDATA)
tsu(SDATA)
START hold time
4
4.7
4
SCLK low-pulse duration
SCLK high-pulse duration
START setup time
SDATA hold time
0.6
0.3
0.25
SDATA setup time
tr(SDATA)
tr(SM)
/
SCLK/SDATA input rise time
SCLK/SDATA input fall time
1000
300
ns
ns
tf(SDATA)
/
tf(SM)
tsu(STOP)
t(BUS)
STOP setup time
Bus free time
4
µs
µs
4.7
t(POR)
Time in which the device must be operational after power-on reset
500
ms
DEVICE CHARACTERISTICS
over recommended operating free-air temperature range and test load (unless otherwise noted), see Figure 1
PARAMETER
OVERALL PARAMETER
TEST CONDITIONS
MIN
TYP(1)
MAX UNIT
All PLLs on, all outputs on,
fOUT = 80 MHz, fCLK_IN = 27 MHz,
fVCO = 160 MHz
ICC
Supply current(2)
90
115
mA
Every circuit powered down except SMBus,
fIN = 0 MHz, VCC = 3.6 V
ICCPD Power-down current
50
µA
Supply voltage VCC threshold for power-up
control circuit
VPUC
2.1
V
(1) All typical values are at nominal VCC
.
(2) For calculating total supply current, add the current from Figure 2, Figure 3, and Figure 4. Using the high-speed mode of the VCO
reduces the current consumption. See Figure 3.
6
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