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參數(shù)資料
| 型號(hào)： | CY2SSTV855ZXIT |
| 廠商： | Silicon Laboratories Inc |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CLOCK DIFFDRV PLL DDR 28TSSOP |
| 標(biāo)準(zhǔn)包裝： | 2,000 |
| 系列： | * |
| 類型： | * |
| PLL： | * |
| 主要目的： | * |
| 輸入： | * |
| 輸出： | * |
| 電路數(shù)： | * |
| 比率 - 輸入:輸出： | * |
| 差分 - 輸入:輸出： | * |
| 頻率 - 最大： | * |
| 電源電壓： | * |
| 工作溫度： | * |
| 安裝類型： | * |
| 封裝/外殼： | * |
| 供應(yīng)商設(shè)備封裝： | * |
| 包裝： | * |
CY2SSTV855
......................... Document #: 38-07459 Rev. *F Page 5 of 6
Absolute Maximum Conditions[3]
Input Voltage Relative to VSS:...............................VSS – 0.3V
Input Voltage Relative to VDDQ or AVDD: ............. VDD + 0.3V
Storage Temperature: ................................ –65
C to + 150C
Operating Temperature:................................ –40
C to +85C
Maximum Power Supply: ................................................ 3.5V
This device contains circuitry to protect the inputs against
damage due to high static voltages or electric field; however,
precautions should be taken to avoid application of any
voltage higher than the maximum rated voltages to this circuit.
For proper operation, Vin and Vout should be constrained to the
range:
VSS < (Vin or Vout) < VDD.
Unused inputs must always be tied to an appropriate logic
voltage level (either VSS or VDD).
DC Electrical Specifications (AVDD = VDDQ = 2.5V ± 5%, TA = –40°C to +85°C)
Parameter
Description
Conditions
Min.
Typ.
Max.
Unit
VID
Differential Input Voltage[5]
CLKINT, FBINT
0.36
VDDQ + 0.6
V
VIX
Differential Input Crossing Voltage[6] CLKTIN, FBINT
(VDDQ/2) –
0.2
VDDQ/2 (VDDQ/2) +
0.2
V
IIN
Input Current
VIN = 0V or VIN = VDDQ, CLKINT,
FBINT
–10
–
10
A
IOL
Output Low Current
VDDQ = 2.375V, VOUT = 1.2V
26
35
–
mA
IOH
Output High Current
VDDQ = 2.375V, VOUT = 1V
–18
–32
–
mA
VOL
Output Low Voltage
VDDQ = 2.375V, IOL = 12 mA
–
0.6
V
VOH
Output High Voltage
VDDQ = 2.375V, IOH = –12 mA
1.7
–
V
VOUT
Output Voltage Swing[7]
1.1
–
VDDQ – 0.4
V
VOC
Output Crossing Voltage[8]
(VDDQ/2) –
0.2
VDDQ/2 (VDDQ/2) +
0.2
V
IOZ
High-Impedance Output Current
VO = GND or VO = VDDQ
–10
10
A
IDDQ
Dynamic Supply Current[9]
VDDQ = 170 MHz
–
235
300
mA
IDD
PLL Supply Current
AVDD only
–
9
12
mA
Cin
Input Pin Capacitance
–
4
–
pF
AC Electrical Specifications (AVDD = VDDQ = 2.5V±5%, TA = –40°C to +85°C)
Parameter
Description
Conditions
Min.
Typ.
Max.
Unit
fCLK
Operating Clock Frequency
AVDD = 2.5V 0.2V
60
170
MHz
tDC
Input Clock Duty Cycle[12]
40
60
%
tLOCK
Maximum PLL lock Time
100
s
tSL(O)
Output Clocks Slew Rate
20% to 80% of VOD
1
2
V/ns
tPZL, tPZH
Output Enable Time (all outputs)[13]
30
ns
tPLZ, tPHZ
Output Disable Time (all outputs)[13]
10
ns
tCCJ
Cycle to Cycle Jitter
f > 66 MHz
–100
100
ps
tJITT(H-PER) Half-period jitter
f > 66 MHz
–100
100
ps
Notes:
3. Multiple Supplies: The voltage on any input or I/O pin cannot exceed the power pin during power-up. Power supply sequencing is NOT required.
4. Unused inputs must be held HIGH or LOW to prevent them from floating.
5. Differential input signal voltage specifies the differential voltage |VTR – VCP| required for switching, where VTR is the true input level and VCP is the comple-
mentary input level.
6. Differential cross-point input voltage is expected to track VDDQ and is the voltage at which the differential signals must be crossing.
7. For load conditions see Figure 6.
8. The value of VOC is expected to be |VTR + VCP|/2. In case of each clock directly terminated by a 120 resistor. See Figure 6.
9. All outputs switching loaded with 16 pF in 60
environment. See Figure 6.
10. Parameters are guaranteed by design and characterization. Not 100% tested in production.
11. PLL is capable of meeting the specified parameters while supporting SSC synthesizers with modulation frequency between 30 kHz and 33.3 kHz with a
downspread of –0.5%
12. While the pulse skew is almost constant over frequency, the duty cycle error increases at higher frequencies. This is due to the formula: duty cycle = tWH/tC,
where the cycle time (tC) decreases as the frequency goes up.
13. Refers to transition of non-inverting output.
14. All differential input and output terminals are terminated with 120
/16 pF as shown in Figure 6.
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