LMH2190TM-38/NOPB National Semiconductor, LMH2190TM-38/NOPB Datasheet - Page 16

• Manufacturer Part Number: LMH2190TM-38/NOPB
• Description: IC CLOCK QUAD 26MHZ DVR 16-USMD
• Manufacturer: National Semiconductor
• Type: Fanout Buffer (Distribution)r

Specifications of LMH2190TM-38/NOPB

• Number Of Circuits: 1
• Ratio - Input:output: 1:4
• Differential - Input:output: No/No
• Input: Clock
• Output: Clock
• Frequency - Max: 27MHz
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-MicroSMD
• Frequency-max: 27MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMH2190TM-38TR

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Transferring Data
Every frame on the SDA line must be eight bits long, with the
most significant bit (MSB) being transferred first. Each byte of
data has to be followed by an acknowledge bit. The acknowl-
edge related clock pulse is generated by the master. The
transmitter releases the SDA line (HIGH) during the acknowl-
edge clock pulse. The receiver must pull down the SDA line
during the 9th clock pulse, signifying an acknowledge. A re-
ceiver which has been addressed must generate an acknowl-
edge after each byte has been received.
After the START condition, the I
dress
an eight bit which is a data direction bit (R/W). For the eighth
bit, a “0” indicates a WRITE and a “1” indicates a READ. The
second byte selects the register to which the data will be writ-
ten. The third byte contains data to write to the selected
register.
(Figure
14). This address is seven bits long followed by
2
C master sends a chip ad-
FIGURE 15. Example I
FIGURE 16. Example I
16
Register changes take effect at the SCL rising edge during
the last ACK from slave. An example of a WRITE cycle is
given in
plished, a WRITE function must precede the READ function,
as shown in the Read Cycle waveform
2
2
C Write Cycle
C Read Cycle
Figure
FIGURE 14. I
15. When a READ function is to be accom-
2
C Chip Address
(Figure
30083823
16).
30083820
30083824