ICS9DB401 Datasheet, PDF (6/16 Pages) Integrated Circuit Systems – Four Output Differential Buffer for PCI Express

Integrated
Circuit
Systems, Inc.
ICS9DB401
Electrical Characteristics - DIF 0.7V Current Mode Differential Pair
T_A = 0 - 70°C; V_DD = 3.3 V +/-5%; C_L =2pF, R_S=33.2Ω, R_P=49.9Ω, Ι_REF = 475Ω
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Current Source Output
Impedance
Zo¹
V_O = V_x
3000
Ω
Voltage High
Voltage Low
VHigh
VLow
Statistical measurement on single
ended signal using oscilloscope
math function.
660
-150
850
mV
150
Max Voltage
Min Voltage
Vovs
Vuds
Measurement on single ended
signal using absolute value.
-300
1150
mV
Crossing Voltage (abs) Vcross(abs)
250
550
mV
Crossing Voltage (var)
d-Vcross
Variation of crossing over all
edges
140
mV
Long Accuracy
ppm
see Tperiod min-max values
0
ppm
Rise Time
t_r
V_OL = 0.175V, V_OH = 0.525V
175
700
ps
Fall Time
t_f
V_OH = 0.525V V_OL = 0.175V
175
700
ps
Rise Time Variation
d-t_r
125
ps
Fall Time Variation
Duty Cycle
d-t_f
d_t3
Measurement from differential
wavefrom
45
125
ps
55
%
Skew
t_sk3
V_T = 50%
PLL mode,
50
ps
Jitter, Cycle to cycle
t_jcyc-cyc
Measurement from differential
wavefrom
50
ps
BYPASS mode as additive jitter
50
ps
1_{Guaranteed by design and characterization, not 100% tested in production.}
2 _{All Long Term Accuracy and Clock Period specifications are guaranteed with the assumption that the input clock}
complies with CK409/CK410 accuracy requirements
3_{IREF = VDD/(3xRR). For RR = 475Ω (1%), IREF = 2.32mA. IOH = 6 x IREF and VOH = 0.7V @ ZO=50Ω.}
NOTES
1
1,3
1,3
1
1
1
1
1,2
1
1
1
1
1
1
1
1
1014B—09/07/06
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