HMC542LP4_09 Datasheet, PDF (5/8 Pages) Hittite Microwave Corporation – 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz

HMC542LP4 / 542LP4E
v03.0809
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR, DC - 3 GHz
5
Pin Descriptions
Pin Number
Function
1, 3, 5, 14,
16-18, 23
N/C
Description
The pins are not connected internally; however, all data
shown herein was measured with these pins connected to
RF/DC ground externally.
Interface Schematic
2
Vcc
Supply Voltage.
4, 15
6 - 11, 13
12
RF1, RF2
ACG1 - ACG7
N/C
This pin is DC coupled and matched to 50 Ohms
Blocking capacitors are required. Select value based on
lowest frequency of operation.
External capacitor to ground is required. Select value for
lowest frequency of operation. Place capacitor as close to
pins as possible.
This pin is not connected internally and any connection made
to it externally will have no effect on product performance.
19
Serial Output
Serial data output. Serial input data
delayed by 8 clock cycles
20
Reset
21
Shift Clock
22
Latch Enable
See truth table, control voltage table and timing diagram.
24
Serial Input
GND
Package bottom has an exposed metal paddle
that must be connected to RF/DC Ground.
5 - 202
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20 Alpha Road, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
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