lmh0346mh National Semiconductor Corporation, lmh0346mh Datasheet
lmh0346mh
Available stocks
Related parts for lmh0346mh
lmh0346mh Summary of contents
Page 1
... LVCMOS compatible. The LMH0346 is powered from a single 3.3V supply. Power dissipation is typically 370 mW. The device is housed in a 20- pin e-TSSOP package. Typical Application © 2007 National Semiconductor Corporation Features ■ Supports SMPTE 424M, SMPTE 292M, and SMPTE 259M (C) serial digital video standards ■ ...
Page 2
... Block Diagram Connection Diagram The exposed die attach pad is the negative electrical terminal for this device. It must be connected to the negative power supply voltage. www.national.com 20215002 20-Pin e-TSSOP Order Number LMH0346MH See NS Package Number MXA20A 2 20215003 ...
Page 3
Pin Descriptions Pin Name 1 LF1 2 LF2 3 RATE 0 4 RATE 1 5 SDI 6 SDI BYPASS/AUTO BYPASS 9 OUTPUT MUTE 10 XTAL IN/EXT CLK 11 XTAL OUT 12 LOCK DETECT 13 SCO/SDO2 14 ...
Page 4
Absolute Maximum Ratings It is anticipated that this device will not be offered in a military qualified version. If Military/Aerospace specified devices are required, please contact the National Semicon- ductor Sales Office/Distributors for availability and specifica- tions. Supply Voltage (V ...
Page 5
AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified. (Note 3) Symbol Parameter BR Serial Data Rate SMPTE 259M Serial Data Rate SMPTE 292M SD BR Serial Data Rate SMPTE 424M SD TOL ...
Page 6
Symbol Parameter Input rise/fall time Input rise/fall time Input rise/fall time Output rise/fall time Output rise/fall time ...
Page 7
Device Description The LMH0346 3Gbps HD/SD SDI Reclocker is used in many types of digital video signal processing equipment. Supported serial digital video standards are SMPTE 259M (C), SMPTE 292M, and SMPTE 424M. Corresponding serial data rates are 270 Mbps, ...
Page 8
FIGURE 2. Equivalent SDO Output Circuit (SDO, SDO, SCO/SDO2, SCO/SDO2) OPERATING SERIAL DATA RATES This device operates at serial data rates of 270 Mbps, 1483 Mbps, 1485 Mbps, 2967 Mbps, and 2970 Mbps. The device does not lock to harmonics ...
Page 9
LOCK DETECT OUTPUT MUTE BYPASS/AUTO BYPASS LOCK DETECT 1 LOCK DETECT 1 LOCK DETECT X 1 SD/HD The SD/HD output indicates whether the LMH0346 is pro- cessing 3Gbps data ...
Page 10
SCO_EN Input SCO_EN enables the SCO/SDO2 differential output to function either as a serial clock or second serial data output. SCO/SDO2 functions as a serial clock when SCO_EN is high. This pin has an internal pull-down device. The default state ...
Page 11
TABLE 3. Crystal Parameters Parameter Frequency 27 MHz Frequency Stability ±50 ppm @ recommended drive level Operating Mode Fundamental mode, Parallel Resonant Load Capacitance 20 pF Parameter Value Shunt Capacitance Series Resistance Recommended Drive Level Maximum Drive Level Operating Temperature ...
Page 12
Application Information Figure 4 shows an application circuit for the LMH0346 along with the LMH0344 3Gbps HD/SD SDI Adaptive Cable Equal- izer and LMH0302 3Gbps HD/SD SDI Cable Driver. www.national.com FIGURE 4. Application Circuit 12 20215004 ...
Page 13
... Physical Dimensions inches (millimeters) unless otherwise noted 20-Pin e-TSSOP Order Number LMH0346MH NS Package Number MXA20A 13 www.national.com ...
Page 14
... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...