HMC542ALP4E HITTITE [Hittite Microwave Corporation], HMC542ALP4E Datasheet - Page 3

• Manufacturer Part Number: HMC542ALP4E
• Description: 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 4 GHz
• Manufacturer: HITTITE [Hittite Microwave Corporation]

8 - 3
8
Worst Case Step Error
Between Successive Attenuation States
Timing
Timing Diagram
serial Input setup time
Hold time from serial
Input to shift Clock
setup time from shift
Clock to Latch enable
Latch enable Window,
Latch enable to C0.5
through C8
setup time from reset to
shift Clock
Clock Frequency
(1/tclk)
-0.2
-0.4
-0.6
-0.8
0.8
0.6
0.4
0.2
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
-1
1
0
0
Parameter
0.5
1
Phone: [phone]
FREQUENCY (GHz)
1.5
symbol
tlsup
Application Support: Phone: [phone] or [e-mail]
fclk
tpd
ts
th
-
2
2.5
Min.
20
40
20
0
Vcc = +5V
-
-
v05.0311
3
Max.
30
30
-
-
-
-
Fax: [phone]
3.5
SERIAL CONTROL ATTENUATOR, DC - 4 GHz
units
MHz
ns
ns
ns
ns
ns
4
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
HMC542ALP4 / 542ALP4E
Digital Control Voltages
Serial Input Truth Table
Truth Table
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
High
High
High
High
High
High
enable
C16
Low
Low
Latch
Order On-line at www.hittite.com
á
X
X
High
High
High
High
High
High
Low
Low
C8
state
High
Low
Clock
shift
á
Control Voltage Input
X
X
High
High
High
High
High
High
Low
Low
C4
reset
H
H
L
High
High
High
High
High
High
Low
Low
C2
High
High
High
High
High
High
Low
Low
C1
Contents of shift register
shift register clocked
shift register cleared
transferred to Digital
Vcc = +5V
0 to 1.3V
3 to 5V
Attenuator
C0.5
High
High
High
High
High
High
Function
Low
Low
Attenuation
rF1 - rF2
reference
31.5 dB
0.5 dB
16 dB
state
1 dB
2 dB
4 dB
8 dB
I.L.