MF4CN-50 National Semiconductor, MF4CN-50 Datasheet - Page 5

• Manufacturer Part Number: MF4CN-50
• Description: IC LOWPASS FILTER 4TH ORD SW CAP
• Manufacturer: National Semiconductor

Specifications of MF4CN-50

• Filter Type: Butterworth, Lowpass Switched Capacitor
• Frequency - Cutoff Or Center: 20kHz
• Number Of Filters: 1
• Max-order: 4th
• Voltage - Supply: 5 V ~ 14 V
• Mounting Type: *
• Package / Case: *
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *MF4CN-50; MF4NC-50

TTL CLOCK INPUT, CLK R PIN (Note 9)
Maximum V
Minimum V
Maximum Leakage Current at CLK R Pin
The following specifications apply for V
other limits T
Logic Input-Output Characteristics
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. AC and DC electrical specifications do not apply when operating
the device beyond its specified operating conditions.
Note 2: All voltages are with respect to GND.
Note 3: The cutoff frequency of the filter is defined as the frequency where the magnitude response is 3.01 dB less than the DC gain of the filter.
Note 4: For
the MF4-50. For
Note 5: The specifications for the MF4 have been given for a clock frequency (f
deviate from the specified error band of
Note 6: Besides checking the cutoff frequency (f
filter. The magnitudes are referenced to a DC gain of 0.0 dB.
Note 7: For simplicity all the logic levels have been referenced to V
±
Note 8: The short circuit source current is measured by forcing the output that is being tested to its maximum positive voltage swing and then shorting that output
to the negative supply. The short circuit sink current is measured by forcing the output that is being tested to its maximum negative voltage and then shorting that
output to the positive supply. These are worst case conditions.
Note 9: The MF4 is operating with symmetrical split supplies and L. Sh is tied to ground.
Note 10: Typicals are at 25˚C and represent most likely parametric norm.
Note 11: Guaranteed to National’s Average Outgoing Quality Level (AOQL).
Note 12: Guaranteed, but not 100% production tested. These limits are not used to determine outgoing quality levels.
Note 13: Human body model; 100 pF discharged through a 1.5 k
Note 14: When the input voltage (V
to 5 mA or less. The 20 mA package input current limits the number of pins that can exceed the power supply boundaries with a 5 mA current limit to four.
Note 15: Thermal Resistance
JA
2.5V supplies.
(Junction to Ambient) N Package:
IH
±
IL
, Logical “1” Input Voltage
5V supplies the dynamic range is referenced to 2.82 Vrms (4V peak) where the wideband noise over a 20 kHz bandwidth is typically 280 µVrms for
, Logical “0” Input Voltage
A
±
Parameter
2.5V supplies the dynamic range is referenced to 1.06 Vrms (1.5V peak) where the wideband noise over a 20 kHz bandwidth is typically 130 µVrms.
= T
J
= 25˚C.
IN
) at any pin exceeds the power supply rails (V
±
105˚C/W.
0.6% but the filter still maintains its magnitude characteristics. See Application Hints.
c
−
) and the stopband attenuation at 2 f
= 0V (Note 7) unless otherwise specified. Boldface limits apply for T
L. Sh Pin at Mid-Supply
−
Conditions
resistor.
= 0V (except for the TTL input logic levels). The logic levels will scale accordingly for
(Continued)
CLK
5
) of 250 kHz or less. Above the clock frequency the cutoff frequency begins to
IN
c
, two additional frequencies are used to check the magnitude response of the
<
V
−
or V
IN
>
(Note 10)
V
Typical
+
) the absolute value of current at that pin should be limited
0.8
2.0
2.0
(Note 11)
Tested
Limit
(Note 12)
Design
Limit
MIN
to T
www.national.com
MAX
±
5V and
; all
Unit
µA
V
V