AK8180D Datasheet, PDF (6/12 Pages) Asahi Kasei Microsystems – 2.5V, 3.3V LVCMOS 1:10 Clock Fanout Buffer

AK8180D
Parameter
Symbol
Conditions
MIN
TYP
MAX Unit
Output Duty Cycle
DCOUT
DCREF= 50%
x1 output
DCREF= 25-75% x1/2 output
45
50
55
%
47
50
53
Output Rise/Fall Time
tr, tf
0.55 to 2.4V
0.1
1.0
ns
(1) AC characteristics apply for parallel output termination of 50  to VTT.
(2) The AK8180D is functional up to an input and output clock frequency of 350MHz and is characterized up to 250MHz.
(3) Vcmr(AC) is the crosspoint of the differential input signal. Normal AC operation is obtained when the crosspoint is within
the Vcmr range and the input swing lies within the Vpp(AC) specification. Violation of Vcmr or Vpp impacts tPLH/PHL and tskD.
(4) Violation of the 1.0 ns maximum input rise and fall time limit will affect the device propagation delay, devi ce-to-device skew,
input pulse width, output duty cycle and maximum frequency specifications .
(5) Output pulse skew tskO is the absolute difference of the propagation delay times :| tPLH - tPHL |.
Output duty cycle is frequency dependent (= 0.5  tskO x fout). For example at fout = 125 MHz the output duty
cycle limit is 50%  2.5%.
Power Supply Current <2.5V>
Parameter
Full operation ⁽¹⁾
Symbol
IDD1
Conditions
CCLK0=250MHz
CLK_SEL=L
Quiescent state ⁽¹⁾⁽²⁾
IDD2
VDD= 2.5V5%, Ta: -40 to +85℃
Min
Typ
Max Unit
71
95
mA
1.6
2.5 mA
(1) The outputs have no loads. (2) All inputs are in default state by the internal pull up/down resisters.
DC Characteristics <2.5V>
All specifications at VDD=VDDA=VDDB=VDDC= 2.5V5%, Ta: -40 to +85℃, unless otherwise noted
Parameter
Symbol
Conditions
MIN
TYP
MAX Unit
High Level Input Voltage
VIH
LVCMOS
1.7
VDD+0.3 V
Low Level Input Voltage
VIL
LVCMOS
-0.3
0.7
V
Peak-to-Peak Input Voltage
Common Mode Range ⁽¹⁾
Input Current ^(２)
High Level Output Voltage
Low level Output Voltage
Vpp
Vcmr
IL1
VOH
VOL
LVPECL
LVPECL
Vin=GND or VDD
IOH= -15mA ^(３)
IOL= +15mA ^(３)
250
mV
1.1
VDD-0.7 V
200 μA
1.8
V
0.6
V
Output Impedance
17-20

(1) Vcmr(DC) is the crosspoint of the differential input signal. Functional operation is o btained when the crosspoint is within the
Vcmr range and the input swing lies within the Vpp(DC) specification.
(2) Input pull-up / pull down resistors influence input current.
(3) The AK8180D is capable of driving 50  transmission lines of the incident edge. Each output drives one 50  parallel
terminated transmission line to a termination voltage of VTT. Alternatively, the device drives up to two 50  series
terminated transmission lines.
(4) IDDQ is the DC current consumption of the device with all outputs open an d the input in its default state or open.
Oct-2011
MS1306-E-01
-6 -