LMH0395SQX/NOPB National Semiconductor, LMH0395SQX/NOPB Datasheet - Page 16

• Manufacturer Part Number: LMH0395SQX/NOPB
• Description: IC EQUALIZER DUAL CABLE 24-LLP
• Manufacturer: National Semiconductor

Specifications of LMH0395SQX/NOPB

• Applications: Amplifier
• Interface: SPI Serial
• Voltage - Supply: 2.5V
• Package / Case: *
• Mounting Type: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Address R/W Name
SPI Registers
00h
01h
02h
R/W General Control
R/W Output Driver
R/W Launch
Amplitude
Control
Bits Field
4:3 Sleep Mode
7:6 Output Swing
5:4 Offset Voltage
2:1 De-Emphasis
6:0 Reserved
7
6
5
2
1
0
3
0
7
Carrier Detect
Mute
Bypass
Driver Select
Master Reset
Acquisition Reset
De-Emphasis
Amplitude Level
Reserved
Launch Amplitude
Control
TABLE 1. SPI Registers
1101000 Reserved as 1101000. Always write 1101000 to these bits.
Default
01
10
10
01
16
0
0
0
0
0
0
0
0
Description
Read only.
0: No carrier detected.
1: Carrier detected.
Mute has precedence over Bypass.
0: Normal operation.
1: Outputs muted.
0: Normal operation.
1: Equalizer bypassed.
Sleep mode control. Sleep has precedence over Mute and
Bypass.
00: Disable sleep mode (force equalizer to stay enabled).
01: Sleep mode active when no input signal detected.
10: Force equalizer into sleep mode (powered down)
regardless of whether there is an input signal or not.
11: Reserved.
Select output driver for control/status.
0: Register 01h bits [7:1] control output driver 0 (SDO0,
SDO0)
1: Register 01h bits [7:1] control output driver 1 (SDO1,
SDO1)
Reset registers and state machine. (This bit is self-clearing.)
0: Normal operation.
1: Reset registers and state machine.
Reset state machine. (This bit is self-clearing.)
0: Normal operation.
1: Reset state machine.
Output driver swing (V
00: V
01: V
10: V
11: V
Output driver offset voltage (common mode voltage).
00: V
01: V
10: V
11: V
Output driver de-emphasis control.
0: De-emphasis disabled.
1: De-emphasis enabled.
Output drive de-emphasis level.
00: 0 dB (no de-emphasis).
01: 3 dB de-emphasis.
10: 5 dB de-emphasis.
11: 7 dB de-emphasis.
Reserved (read only).
Launch amplitude optimization setting.
0: Normal optimization with no external attenuation (800
mV
1: Optimized for 6 dB external attenuation (400 mV
amplitude).
P-P
SSP-P
SSP-P
SSP-P
SSP-P
OS
OS
OS
OS
launch amplitude).
= 0.8V.
= 1.0V.
= 1.2V.
Referenced to positive supply.
= 400 mV
= 600 mV
= 700 mV
= 800 mV
P-P
P-P
P-P
P-P
SSP-P
.
.
.
.
).
P-P
launch