LTC6904HMS8 Linear Technology, LTC6904HMS8 Datasheet - Page 5

• Manufacturer Part Number: LTC6904HMS8
• Description: IC OSC PROG I2C DIG LO PWR 8MSOP
• Manufacturer: Linear Technology
• Type: Oscillator, Siliconr

Specifications of LTC6904HMS8

• Frequency: 68MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Current - Supply: 7mA
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Count: -
• Lead Free Status / Rohs Status: Not Compliant

Typical perFormance characTerisTics
pin FuncTions
GND (Pin 1): Negative Power Supply (Ground). Should be
tied directly to a ground plane for best performance.
SDI (Pin 2): Serial Data Input. Data for serial transfer is
presented on this pin.
SCK (Pin 3): Serial Port Clock. Input, positive edge trig-
gered. Clocks serial data in on rising edge.
SEN (Pin 4): Serial Port Enable (LTC6903 Only). Input,
active LOW. Initiates serial transaction when brought LOW,
finalizes transaction when brought HIGH after 16 clocks.
ADR (Pin 4): Serial Port Address (LTC6904 Only). Sets
the I
0.01
–80
0.1
10
20
15MHz
2
1
0
C serial port address.
0.1
Peak-to-Peak Jitter vs Frequency
Output Spectrum at 20MHz
V
+
= 3V
FREQUENCY (MHz)
1
20MHz
10
6903 G04
6903 G07
25MHz
100
10
9
8
7
6
5
4
3
2
1
0
0.001
C
V
Supply Current vs Output
Frequency
Output Waveform at 68MHz
L
+
= 10pF
= 3V
0.01
FREQUENCY (MHz)
0.1
5ns/DIV
CLK (Pin 5): Auxiliary Clock Output. Frequency set by
serial port.
CLK (Pin 6): Main Clock Output. Frequency set by serial
port.
OE (Pin 7): Asynchronous Output Enable. CLK and CLK
are set LOW when this pin is LOW.
V
kept free from noise and ripple. It should be bypassed
directly to a ground plane with a quality 0.1µF capacitor.
Additional bypass may be necessary for operation at high
frequency or under larger loads.
+
1
(Pin 8): Positive Power Supply. This supply must be
V
+
= 5V
V
10
+
= 3V
6903 G08
6903 G05
100
LTC6903/LTC6904
60
50
40
30
20
10
0
2.5
Output Resistance vs Supply
Voltage
Output Waveform at 20MHz
C
V
L
+
= 10pF
= 3V
3.0
SUPPLY VOLTAGE (V)
3.5
10ns/DIV
4.0
4.5
5.0
6903 G06
6903 G08
69034fc

5.5