TSH345IPT STMicroelectronics, TSH345IPT Datasheet

IC BUFFER TRPL VID HD/SD 14TSSOP

TSH345IPT

Manufacturer Part Number
TSH345IPT
Description
IC BUFFER TRPL VID HD/SD 14TSSOP
Manufacturer
STMicroelectronics
Datasheet

Specifications of TSH345IPT

Applications
Buffer
Number Of Circuits
3
-3db Bandwidth
36MHz
Current - Supply
44.6mA
Current - Output / Channel
134mA
Voltage - Supply, Single/dual (±)
4.5 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
14-TSSOP
For Use With
497-8933 - BOARD VIDEO BUFF BASED ON TSH345
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-8531-2

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TSH345IPT
Quantity:
7 500
Features
Applications
Description
The TSH345 is a triple single-supply video buffer
featuring an internal gain of 6 dB and selectable
filtering for HD and SD video outputs on 75 Ω
video lines. The TSH345 is ideal to drive YC,
CVBS, YUV, YPbPr or RGB signals from video
DAC outputs.
The main advantage of this circuit is its input DC
level shifter. It allows driving video signals on 75 Ω
video lines without damaging the synchronization
tip and without input or output capacitors when
using a single 5 V power supply. The DC level
shifter is internally fixed and optimized to keep the
output video signals between low and high output
rails in the best position for the greatest linearity.
The TSH345 is available in SO-14 and TSSOP-14
plastic packages for optimum space saving.
December 2008
Selectable 6th order filtering of 36 MHz,
18 MHz and 9 MHz
5 V single-supply operation
Internal input DC level shifter
No input capacitor required
3 matched 6 dB amplifiers
AC or DC output-coupled
Very low harmonic distortion
Specified for 150 Ω loads
Data min. and max. are tested during
production
High-end video systems
High definition TV (HDTV)
Broadcast and graphic video
Multimedia products
Triple video buffer with selectable filter
Rev 1
for HD and SD video applications
+VCC
R2 in
G1 in
G2 in
B2 in
B1 in 5
R1 in
1
2
4
3
6
7
TSSOP14
36MHz
36MHz
36MHz
18MHz
18MHz
18MHz
9MHz
9MHz
9MHz
SO-14
LPF
LPF
LPF
DC Shifter
+
+
+
6dB
6dB
6dB
TSH345
14
13
12
11
10
8
9
GND
Fs0
Fs1
R out
G out
B out
Mux
www.st.com
1/23
23

Related parts for TSH345IPT

TSH345IPT Summary of contents

Page 1

Features ■ Selectable 6th order filtering of 36 MHz, 18 MHz and 9 MHz ■ single-supply operation ■ Internal input DC level shifter ■ No input capacitor required ■ 3 matched 6 dB amplifiers ■ ...

Page 2

Absolute maximum ratings and operating conditions 1 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol (1) V Supply voltage CC V Input voltage range in T Operating free air temperature range oper T Storage temperature stg ...

Page 3

TSH345 2 Electrical characteristics Table 3. Electrical characteristics at V (unless otherwise specified) Symbol DC performance Output DC shift -40° C < T Input bias current amb -40° C < T Input resistance, ...

Page 4

Electrical characteristics Table 3. Electrical characteristics at V (unless otherwise specified) (continued) Symbol Bandwidth F2 selected, small signal, V Standard -3 dB bandwidth definition -1 dB bandwidth with progressive Attenuation scanning F2 selected MHz, small signal, V ICM ...

Page 5

TSH345 Table 4. Filter and standby settings, V (1) Fs1 Fs0 Fs1 and Fs0 pins must never be left floating. Table 5. Mux settings, V (1) Mux The MUX pin must never ...

Page 6

Electrical characteristics Figure 1. Filtering 10 0 -10 -20 -30 Vcc=5V -40 small signal Ω Load=150 -50 1M 10M Frequency (Hz) Figure 3. Distortion 1 MHz (HD) 0 Vcc=5V -10 F=1MHz -20 HD filter Ω Load=150 -30 -40 -50 HD2 ...

Page 7

TSH345 Figure 7. Distortion 1 MHz (SD filter) 0 Vcc=5V -10 F=1MHz SD filter -20 Ω Load=150 -30 -40 -50 HD2 -60 -70 -80 HD3 -90 -100 0.0 0.5 1.0 1.5 2.0 Output Amplitude (Vp-p) Figure 9. Gain vs. input ...

Page 8

Electrical characteristics Figure 13. Current consumption vs. supply Vcc=5V no Load 0.0 0.5 1.0 1.5 2.0 2.5 Vcc (V) Figure 15. Filtering vs. temperature 40 Vcc=5V Ω Load=150 ...

Page 9

TSH345 Figure 19. Standby current vs. temperature 180 Vcc=5V no Load 170 160 150 140 130 120 -40 - Temperature (°C) Figure 21. Isource vs. temperature 120 110 100 Vcc=5V 50 -40 -20 0 ...

Page 10

Electrical characteristics Figure 25. Gain vs. temperature 2.20 2.15 2.10 2.05 2.00 1.95 1.90 Vcc=5V 1.85 Ω Load=150 1.80 -40 - Temperature (°C) 10/ TSH345 ...

Page 11

TSH345 2.1 Power supply considerations: improving the power supply noise rejection Correct power supply bypassing is very important to optimize performance in low- and high- frequency ranges. Bypass capacitors should be placed as close as possible to the IC pin ...

Page 12

Electrical characteristics Figure 27. Circuit for noise rejection improvement measurement +5 V Figure 28 shows how the power supply noise rejection evolves according to the frequency and depending on how carefully power supply decoupling is achieved. Figure 28. Power supply ...

Page 13

TSH345 Using the TSH345 to drive YC, CVBS, YUV, YPbPr and RGB video components 3 Using the TSH345 to drive YC, CVBS, YUV, YPbPr and RGB video components Figure 29. Implementation of the video driver on output video DACs Reconstruction ...

Page 14

Using the TSH345 to drive YC, CVBS, YUV, YPbPr and RGB video components Figure 30. Synchronization details (example for a black picture (2t) HD 300 mV 590 ns ( c.t ip 160 ...

Page 15

TSH345 Using the TSH345 to drive YC, CVBS, YUV, YPbPr and RGB video components Figure 32. Standard video signal 300 mV DAC’s offset GND (DAC’s offset on STi7200 = 28 mV) Video contents MHz 1.3 Vp-p (+/- ...

Page 16

Using the TSH345 to drive YC, CVBS, YUV, YPbPr and RGB video components Figure 33. Flexibility of the TSH345 for SD and HD signals HD/PV/SD Y,G DAC Pb,B,C DAC Pr,R,C DAC HD/PV/SD Y,G DAC Pb,B,C DAC Pr,R,C DAC The TSH345 ...

Page 17

TSH345 Using the TSH345 to drive YC, CVBS, YUV, YPbPr and RGB video components 3.1 Output capacitor The output can be either DC-coupled or AC-coupled. The output can be directly connected to the line via a 75-Ω resistor (see any ...

Page 18

Package information 4 Package information In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ...

Page 19

TSH345 4.1 SO-14 package information Figure 36. SO-14 package mechanical drawing Table 6. SO-14 package mechanical data Ref ddd Note: D and F dimensions do not include mold ...

Page 20

Package information 4.2 TSSOP14 package information Figure 37. TSSOP14 package mechanical drawing Table 7. TSSOP14 package mechanical data Ref aaa 20/23 Dimensions Millimeters Min. Typ. Max. 1.20 0.05 ...

Page 21

... TSH345 5 Ordering information Table 8. Order codes Part number TSH345ID TSH345IDT TSH345IPT Temperature Package range SO-14 -40°C to +85°C TSSOP14 Ordering information Packing Marking Tube TSH345I Tape & reel TSH345I Tape & reel TSH345I 21/23 ...

Page 22

Revision history 6 Revision history Table 9. Document revision history Date 29-May-2007 18-Dec-2008 22/23 Revision 1 Initial release. Added curves in Chapter 2: Electrical 2 Added all test limits in Changes characteristics. Chapter Table 3. TSH345 ...

Page 23

... TSH345 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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