HMC542ALP4 Datasheet, PDF (5/8 Pages) Hittite Microwave Corporation – 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 4 GHz

HMC542ALP4 / 542ALP4E
v05.0311
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR, DC - 4 GHz
8
Pin Descriptions
Pin Number
Function
1, 3, 5, 14,
16-18, 23
N/C
Description
These pins are not connected internally. However, all data
shown herein was measured with these pins connected
to RF/DC Ground.
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
8-5
See truth table, control voltage table and timing diagram.
21
Shift Clock
22
Latch Enable
24
Serial Input
GND
Package bottom has an exposed metal paddle
that must be connected to RF/DC Ground.
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: [phone] Fax: [phone] Order On-line at www.hittite.com
Application Support: Phone: [phone] or [e-mail]