B9940L
2.5V / 3.3V, 200 MHz, 1:18 Clock Distribution Buffer
Maximum Ratings
Maximum Input Voltage Relative to VSS: VSS - 0.3V
Maximum Input Voltage Relative to VDD: VDD + 0.3V
Storage Temperature:
Operating Temperature:
Maximum ESD protection
Maximum Power Supply:
Maximum Input Current:
-65°C to + 150°C
-40°C to +85°C
2kV
5.5V
±20mA
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 Parameters
Characteristic
Input Low Voltage
Input High Voltage
Input Low Current (@VIL = VSS)
Input High Current (@VIL =VDD)
Peak-to-Peak Input Voltage
PECL_CLK
Common Mode Range
PECL_CLK
Symbol
VIL
VIH
IIL
1
IIH
VPP
VCMR
2
1
Min
VSS
2.0
Typ
Max
0.8
VDD
-200
200
1000
Units
V
µA
µA
mV
V
Conditions
All other inputs
All other inputs
500
VDD-
1.4
VDD-
1.0
2.4
1.8
-
18
-
-
-
Output Low Voltage
Output High Voltage
Quiescent Supply Current
Output Impedance
Input Capacitance
VOL
3
3
VDD-
0.6
VDD-
0.6
0.5
VDD = 3.3V
VDD = 2.5V
V
V
IOL = 20mA
IOH = -20mA, VDDC = 3.3V
IOH = -20mA, VDDC = 2.5V
VOH
IDD
2
23
4
5
28
-
mA
Ω
pF
Zout
Cin
VDD = 3.3V
±
5% or 2.5V
±
5%, VDDC = 3.3V
±
5% or 2.5V
±
5%, TA = -40°C to +85°C
°
°
Note 1:
Inputs have pull-up/pull-down resistors that effect input current.
Note 2:
The VCMR is the difference from the most positive side of the differential input signal. Normal operation is
obtained when the “High” input is within the VCMR range and the input lies within the VPP specification.
Note 3:
Driving series or parallel terminated 50Ω (or 50Ω to VDD/2) transmission lines.
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress.com
Document#: 38-07105 Rev. **
5/24/2001
Page 3 of 7
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