HMC542LP4E HITTITE [Hittite Microwave Corporation], HMC542LP4E Datasheet - Page 3

• Manufacturer Part Number: HMC542LP4E
• Description: 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3.0 GHz
• Manufacturer: HITTITE [Hittite Microwave Corporation]

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6
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
Propagation delay, 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
-1
1
0
0
Parameter
0.5
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1
FREQUENCY (GHz)
1.5
Symbol
tlsup
fclk
tpd
ts
th
-
2
2.5
Min.
20
40
20
0
Vcc = +5V
-
-
3
v00.0306
SERIAL CONTROL ATTENUATOR, DC - 3.0 GHz
Order On-line at www.hittite.com
Max.
30
30
-
-
-
-
3.5
Units
MHz
4
ns
ns
ns
ns
ns
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
CMOS 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
X
X
HMC542LP4
High
High
High
High
High
High
Low
Low
C8
State
High
Low
Clock
Shift
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
transferrred to Digital
Shift register cleared
/
542LP4E
3.5 to 5.0V
Vcc = +5V
0 to 1.3V
Attenuator
C0.5
High
High
High
High
High
High
Function
Low
Low
RF1 - RF2
Reference
tion State
Attenua-
31.5 dB
0.5 dB
16 dB
1 dB
2 dB
4 dB
8 dB
I.L.