July 2005
ASM2I99446
rev 0.4
Table 7: AC CHARACTERISTICS (VCC = VCCA = VCCB = VCCC = 3.3V ±5%, TA = –40°C to +85°C)1
Symbol
Characteristics
Min Typ Max
Unit
Condition
fref
Input Frequency
0
0
2502
MHz
÷1 output
÷2 output
2502
125
MHz
FSELx=0
FSELx=1
fMAX
Maximum Output Frequency
0
MHz
tP, REF
tr, tf
Reference Input Pulse Width
CCLK Input Rise/Fall Time
1.4
nS
nS
1.03
0.8 to 2.0V
tPLH
tPHL
CCLK0,1 to any Q
CCLK0,1 to any Q
2.2
2.2
2.8
2.8
4.45
nS
Propagation delay
4.2
nS
tPLZ, HZ
tPZL, LZ
Output Disable Time
Output Enable Time
Output-to-output Skew
10
10
nS
nS
150
200
350
pS
pS
pS
Within one bank
tsk(O)
Any output Bank, Same output divider
Any output, Any output divider
tsk(PP)
tSK(P)
Device-to-device Skew
2.25
200
nS
pS
Output pulse skew4
Output Duty Cycle
÷1 output
÷2 output
47
45
50
50
53
%
DCREF = 50%
DCQ
55
%
DC
= 25%-75%
REF
tr, tf
Output Rise/Fall Time
0.1
1.0
nS
0.55 to 2.4V
Note: 1 AC characteristics apply for parallel output termination of 50ꢀ to VTT
2 The ASM2I99446 is functional up to an input and output clock frequency of 350MHz and is characterized up to 250MHz.
3 Violation of the 1.0nS maximum input rise and fall time limit will affect the device propagation delay, device-to-device skew, reference input pulse width,
output duty cycle and maximum frequency specifications.
4 Output pulse skew is the absolute difference of the propagation delay times | tpLH - tpHL |.
Table 8: DC CHARACTERISTICS (VCC = VCCA = VCCB = VCCC = 2.5V ±5%, TA = –40°C to +85°C)
Symbol
VIH
VIL
VOH
VOL
ZOUT
Characteristics
Min
1.7
-0.3
1.8
Typ
Max
VCC + 0.3
0.7
Unit
V
V
V
V
Condition
Input High Voltage
LVCMOS
Input Low Voltage
LVCMOS
Output High Voltage
Output Low Voltage
Output Impedance
IOH=-15 mA1
IOL= 15 mA
0.6
17 - 202
ꢀ
IIN
ICCQ
Input Current2
±200
2.0
µA
mA
VIN=GND or VIN=VCC
All VCC Pins
3
Maximum Quiescent Supply Current
Note: 1 The ASM2I99446 is capable of driving 50ꢀ transmission lines on the incident edge. Each output drives one 50ꢀ parallel terminated transmission line to
a termination voltage of VTT. Alternatively, the device drives up to two 50ꢀ series terminated transmission lines per output.
2 Input pull-up / pull-down resistors influence input current.
3 ICCQ is the DC current consumption of the device with all outputs open and the input in its default state or open.
2.5V and 3.3V LVCMOS Clock Distribution Buffer
5 of 14
Notice: The information in this document is subject to change without notice.
PULSECORE [ PulseCore Semiconductor ]
