PI6C48535-11
Features
• Maximum operation frequency: 500MHz • 4 pair of differential LVPECL outputs • Selectable CLK and crystal inputs
• CLK accepts LVCMOS, LVTTL input level • Output Skew: 30ps (maximum)
• Part-to-part skew: 150ps (maximum)• Propagation delay: 1.5ns (maximum) • 3.3V power supply
• Pin-to-pin compatible to ICS8535-11• Operating Temperature: -40o C to 85o C • Packaging (Pb-free & Green available ): - 20-pin TSSOP (L)
奥迪敞篷跑车多少钱3.3V Low Skew 1-to-4
Crystal/LVCMOS to LVPECL Fanout Buffer
Description
The PI6C48535-11 is a high-performance low-skew LVPECL fanout buffer. PI6C48535-11 features selectable of single-ended clock or crystal inputs and translates to four LVPECL outputs. The CLK input accepts LVCMOS or LVTTL signals. The outputs are synchronized with input clock during asynchronous assertion /deassertion of CLK_EN pin. PI6C48535-11 is ideal for crystal or LVCMOS/LVTTL to LVPECL translation. Typical clock transla-tion and distribution applications are data-communications and telecommunications.
Pin Diagram
Q 0
N Q 0
V CC Q 1
N Q 1
Q 2
N Q 2
V CC Q 3
N Q 3
V EE CLK_EN CLK_SEL
CLK NC Xtal 1Xtal 2NC NC V CC
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PI6C48535-11
3.3V Low Skew 1-to-4
Crystal/LVCMOS to LVPECL Fanout Buffer
Pin Description
Name Pin #Type Description
V EE1P Connect to Negative power supply
CLK_EN2I_PU Synchronizing clock enable. When high, clock outputs follow clock input. When low, Q x outputs are forced low, n Q x outputs are forced high. LVCMOS/LVTTL level with 50KΩ pull up.
CLK_SEL3I_PD Clock select input. When high, selects CLK1 input. When low, selects CLK0 input.
LVCMOS/LVTTL level with 50KΩ pull down.
CLK4I_PD LVCMOS / LVTTL clock input
Xtal1,
Xtal26, 7Crystal input and output
NC5, 8, 9No internal connection.
V CC10, 13,
18P Connect to 3.3V
Q3, n Q311, 12O Differential output pair, LVPECL interface level.
Q2, nQ214, 15O Differential output pair, LVPECL interface level.
Q1, n Q116, 17O Differential output pair, LVPECL interface level.
Q0, n Q019, 20O Differential output pair, LVPECL interface level.
Notes:
1. I = Input, O = Output, P = Power supply connection, I_PD = Input with pull down, I_PU = Input with pull up
Pin Characteristics
Symbol Parameter Conditions Min.Typ.Max.Units
C IN Input Capacitance4pF
R_pullup Input Pullup Resistance50KΩR_pulldown Input Pulldown Resistance50KΩ
Inputs Outputs CLK_EN CLK_SEL Selected Source Q0:Q3n Q0:n Q3 00CLK Diasbled: Low Diasbled: High
01Xtal1, Xtal2Disabled: Low Disabled: High
10CLK Enabled Enabled
11Xtal1, Xtal2Enabled Enabled Notes:
1. After CLK_EN switches, the clock outputs are disabled or enabled following a rising and falling input clock edge as show below.
PI6C48535-11
3.3V Low Skew 1-to-4
Crystal/LVCMOS to LVPECL Fanout Buffer
Clock Input Function Table
Inputs Outputs
CLK Q 0:Q 3n Q 0:n Q 3
0LOW HIGH 1
HIGH
LOW
Absolute Maximum Ratings
Symbol Parameter
Conditions车行
Min.
Typ.
Max.Units
V CC Supply voltage Referenced to GND 4.6V
V IN Input voltage Referenced to GND -0.5V CC +0.5V V OUT Output voltage Referenced to GND
-0.5V CC +0.5V
T STG
Storage temperature
-65150
Notes:
1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress speci-
fications only and correct functional operation of the device at these or any other conditions above those listed in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability.
Operating Conditions
Symbol Parameter
Conditions
Min.Typ.Max.Units V CC Power Supply V oltage 3.0 3.3
3.6V
T A Ambient Temperature -40
85o C
I EE
Power Supply Current
60
mA
PI6C48535-11
r是什么牌子车3.3V Low Skew 1-to-4
Crystal/LVCMOS to LVPECL Fanout Buffer
LVCMOS/LVTTL DC Characteristics(T A = -40o C to 85o C, V CC = 3.0V to 3.6V unless otherwise stated below.) Symbol Parameter Conditions Min Typ Max Units
V IH Input High V oltage2V CC+0.3
V V IL Input Low V oltage-0.30.8
I IH Input High
Current CLK, CLK_SEL V IN = V CC = 3.6V150
µA CLK_EN V IN = V CC = 3.6V5
I IL Input Low
Current CLK, CLK_SEL V IN = 0V, V CC = 3.6V-5 CLK_EN V IN = 0V, V CC = 3.6V-150
LVPECL DC Characteristics (T A = -40o C to 85o C, V CC = 3.0V to 3.6V unless otherwise stated below.)
Symbol Parameter Conditions Min.Typ.Max.Units V OH Output High V oltage(1)V CC-1.4V CC-0.9
V V OL Output Low V oltage(1)V CC-2.0V CC-1.7
V SWING Peak-to-peak Output V oltage Swing0.6 1.0
Notes:
1. Outputs terminated with 50Ω to V CC-
2.0V
Crystal Characteristics
me7Parameter Min.Typ.Max.Units Mode of Oscillation Fundamental
Frequency Range1425MHz Equivalent Series Resistance (ESR)70ΩShunt Capacitance7pF
AC Characteristics (T A = -40o C to 85o C, V CC = 3.0V to 3.6V)
Symbol Parameter Conditions Min.Typ.Max.Units
f max Output Frequency 500MHz
t Pd Propagation Delay(1) 1.0 1.5ns Tsk(o)Output-to-output Skew(2)30
ps Tsk(pp)Part-to-part Skew(3)150
t r/t f Output Rise/Fall time20% - 80% 100400
odc Output duty cycle4852% Osc Crystal Tolerance1000ppm Notes:
1. Measured from the V CC/2 of the input to the differential output crossing point
2. Defined as skew between outputs at the same supply voltage and with equal load condition. Measured at the outputs differential crossing point.
3. Defined as skew between outputs on different parts operating at the same supply voltage and with equal load condition. Measured at the out-
puts differential crossing point.
4. All parameters are measured at 500MHz unless noted otherwise
PI6C48535-11
3.3V Low Skew 1-to-4
Crystal/LVCMOS to LVPECL Fanout Buffer
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom
Ordering Information
Ordering Code Package Code
Package Description
PI6C48535-11LE
L
Pb-free & Green 20-pin 173-mil wide TSSOP
Notes:
1. Thermal characteristics can be found on the company web site at www.pericom/packaging/
2. Number of Transistors = TBD
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