LMH0026

NC

RSVD

OP MUTE

XTAL IN/EXT CLK

LF2

LF1

SDI

SDI

VCC

BP/ AUTO-BP

1

2

3

4

5

6

7

8

9

10

SCO_EN

11

12

13

14

15

16

17

18

19

20

XTAL OUT

LOCK DET

SCO/SDO2

SCO/SDO2

VCCO

VCCO

SDO

SDO

Coaxial Cable

75:

37.4:

75:

6.8 nH

LMH0074 Adaptive

Cable Equalizer

SDI

SDO

SDI

SDO

100:

56 nF

27 MHz

DAP

39 pF

39 pF

75:

LMH0001

Cable Driver

SDO

SDI

RREF

SDO

SDI

100:

75:

75:

75:

75:

750:

A

B

Additional

Outputs

A

B

75:

LOCK DET

OP MUTE

BP/ AUTO-BP

VCC

VCC

+3.3V

+3.3V

SCO_EN

Coaxial Cable

Coaxial Cable

1.0 PF

1.0 PF

1.0 PF

4.7 PF

4.7 PF

5.6 nH

5.6 nH

SD

SD

LMH0026

www.ti.com

SNLS253B – MARCH 2008 – REVISED APRIL 2013

Table 2. Crystal Parameters

Parameter

Value

Frequency

27 MHz

Frequency Stability

±50 ppm @ recommended drive level

Operating Mode

Fundamental mode, Parallel Resonant

Load Capacitance

20 pF

Shunt Capacitance

7 pF

Series Resistance

40

Ω max.

Recommended Drive Level

100 µW

Maximum Drive Level

500 µW

Operating Temperature Range

−10°C to +60°C

APPLICATION INFORMATION

Figure 5 shows an application circuit for the LMH0026 along with the LMH0074 SMPTE 259M / 344M Adaptive

Cable Equalizer and LMH0001 SMPTE 259M / 344M Cable Driver.

Figure 5. Application Circuit

Copyright © 2008–2013, Texas Instruments Incorporated

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