LMH0344SQ/NOPB National Semiconductor, LMH0344SQ/NOPB Datasheet - Page 14

• Manufacturer Part Number: LMH0344SQ/NOPB
• Description: IC ADAPT CBL EQUALIZER 16-LLP
• Manufacturer: National Semiconductor

Specifications of LMH0344SQ/NOPB

• Applications: Data Transport
• Interface: Serial
• Voltage - Supply: 3.135 V ~ 3.465 V
• Package / Case: 16-LLP
• Mounting Type: Surface Mount
• Leaded Process Compatible: Yes
• Rohs Compliant: Yes
• Peak Reflow Compatible (260 C): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMH0344SQ

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Application Information
APPLICATION CIRCUIT (SPI MODE)
Figure 13
SPI mode. (Note: The application circuit shows an external
INTERFACING TO 3.3V SPI
The LMH0394 may be controlled via optional SPI register ac-
cess. The LMH0394 SPI pins support 2.5V LVCMOS logic
levels and are compliant with JEDEC JESD8-5 (see
trical
the SPI pins to other voltage levels.
The 2.5V LMH0394 SPI pins may be interfaced to a 3.3V
compliant SPI host by using a voltage divider or level trans-
lator. One implementation is a simple resistive voltage divider
as shown in
Characteristics). Care must be taken when interfacing
shows the application circuit for the LMH0394 in
Figure
14.
FIGURE 13. Application Circuit (SPI Mode)
DC Elec-
14
capacitor connected between the AEC+ and AEC- pins as
commonly configured in legacy equalizers. This capacitor is
optional and not necessary for the LMH0394; the AEC+ and
AEC- pins may be left unconnected with no change in perfor-
mance.)
FIGURE 14. 3.3V SPI Interfacing
30101517
30101530