LT1675CS8-1#PBF Linear Technology, LT1675CS8-1#PBF Datasheet

IC MUX RGB HI-SPEED SINGLE 8SOIC

LT1675CS8-1#PBF

Manufacturer Part Number
LT1675CS8-1#PBF
Description
IC MUX RGB HI-SPEED SINGLE 8SOIC
Manufacturer
Linear Technology
Type
MUXr
Datasheet

Specifications of LT1675CS8-1#PBF

Applications
Drivers, Processing, Switching
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Part Number:
LT1675CS8-1#PBFLT1675CS8-1
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APPLICATIO S
FEATURES
DESCRIPTIO
TYPICAL APPLICATIO
The LT
for pixel switching and fast workstation graphics.
Included on chip are three SPDT switches and three
current feedback amplifiers. The current feedback ampli-
fiers drive double-terminated 50Ω or 75Ω cables and are
GREEN 1
GREEN 2
100MHz Pixel Switching
– 3dB Bandwidth: 250MHz
Channel Switching Time: 2.5ns
Expandable to Larger Arrays
Drives Cables Directly
High Slew Rate: 1100V/µs
Low Switching Transient: 50mV
Shutdown Supply Current: 100µA
Output Short-Circuit Protected
Available in Small 16-Pin SSOP Package
RGB Switching
Workstation Graphics
Pixel Switching
Coaxial Cable Drivers
High Speed Signal Processing
BLUE 1
BLUE 2
RED 1
RED 2
®
1675 is a high speed RGB multiplexer designed
75Ω
75Ω
75Ω
75Ω
75Ω
75Ω
High Speed RGB MUX
+1
+1
+1
+1
+1
+1
U
U
LT1675
+2
+2
+2
U
75Ω
75Ω
75Ω
V
ENABLE
+
V
SELECT RGB1/RGB2
CABLE
CABLE
CABLE
75Ω
75Ω
75Ω
V
V
V
OUT RED
OUT GREEN
OUT BLUE
1675 TA01
RGB Multiplexer with Amplifiers
configured for a fixed gain of 2, eliminating six external
gain setting resistors. The SPDT switches are designed to
be break-before-make to minimize unwanted signals cou-
pling to the input.
The LT1675-1 is a single version with two inputs, a single
output and is ideal for a single channel application such as
video sync.
The key to the LT1675 fast switching speed is Linear
Technology’s proprietary high speed bipolar process. This
MUX can toggle between sources in excess of 100MHz,
has a slew rate over 1000V/µs and has a –3dB bandwidth
of 250MHz. Power supply requirements are ±4V to ±6V
and power dissipation is only 300mW on ±5V, or 100mW
for the LT1675-1. The expandable feature uses the disable
pin to reduce the power dissipation to near 0mW in the off
parts.
Unlike competitive solutions that are in bulky high pin
count packages, the LT1675 is in a 16-lead narrow body
SSOP. This small footprint, the size of an SO-8, results in
a very clean high performance solution. The LT1675-1 is
available in the tiny MSOP and the SO-8.
All other trademarks are the property of their respective owners.
, LTC and LT are registered trademarks of Linear Technology Corporation.
250MHz, Triple and Single
PIN 10
LOGIC
INPUT
RED
OUT
Clocking Between 2 DC Levels at 100MHz
3V
0V
1V
0V
RED INPUT 1 = 0VDC, RED INPUT 2 = 1VDC
MEASURED BETWEEN 50Ω BACK TERMINATION AND 50Ω LOAD
LT1675/LT1675-1
1675 TA02
1V/DIV
500mV/DIV
16751fb
1

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LT1675CS8-1#PBF Summary of contents

Page 1

... SSOP. This small footprint, the size of an SO-8, results in a very clean high performance solution. The LT1675-1 is available in the tiny MSOP and the SO-8. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Clocking Between 2 DC Levels at 100MHz ...

Page 2

... V IN1 GND 2 7 ENABLE IN2 OUT – V SELECT PACKAGE 8-LEAD PLASTIC SO = 150°C, θ 150°C/ W JMAX JA ORDER PART S8 PART NUMBER MARKING LT1675CS8-1 16751 http://www.linear.com/leadfree/ TOP VIEW + RED GREEN 1 OUT RED BLUE 1 OUT GREEN GND OUT BLUE – GND – ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T LT1675-1 (Pins 1, 3), ENABLE = 0V, unless otherwise specified. PARAMETER Output Offset Voltage Output Offset Matching Input Current Input Resistance PSRR DC Gain Error Gain Error ...

Page 4

... L Measured at 10MHz Measured at 10MHz, ENABLE Open Measured Between Back Termination and Load LT1675CGN: T LT1675CMS8-1: T LT1675CS8-1: T Note 5: Full power bandwidth is calculated from the slew rate measurement: FPBW = SR/2πV Note 6: Differential Gain and Phase are measured using a Tektronix and power TSG120 YC/NTSC signal generator and a Tektronix 1780R Video A Measurement Set. The resolution of this equipment is 0.1% and 0.1° ...

Page 5

W U TYPICAL PERFORMANCE CHARACTERISTICS Gain and Phase vs Frequency 5 4 PHASE GAIN 0 –1 –2 – 0pF L – 150Ω L –5 100k 1M 10M 100M 1G FREQUENCY (Hz) 1675 G01 ...

Page 6

LT1675/LT1675 TYPICAL PERFORMANCE CHARACTERISTICS Output Impedance vs Frequency 10k DISABLED 1k 100 10 ENABLED 1 100k 1M 10M 100M 1G FREQUENCY (Hz) 1675 G09 Output Short-Circuit Current vs Temperature 90 = ± SOURCING V ...

Page 7

W U TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current vs Temperature –10 = ± –11 –12 –13 – –25 0 TEMPERATURE (°C) Toggling RED 2 to RED 1 3V SELECT PIN 10 0V ...

Page 8

LT1675/LT1675 PIN FUNCTIONS LT1675 RED 1 (Pin 1): Red 1 Input. The 1V video input signal to be switched is applied to this pin applied to this pin, V will clip. The input must ...

Page 9

U U APPLICATIONS INFORMATION Power Supplies The LT1675 will function with supply voltages below ±2V (4V total), however, to ensure a full 1V (2V at the output pins), the power supply voltage P-P should be between ±4V to ±6V. The ...

Page 10

LT1675/LT1675 APPLICATIONS INFORMATION Switching Transients This MUX includes fast current steering break-before- make SPDT switches that minimize switching glitches. The switching transients of Figure 3 are input-referred (measured between 75Ω back termination and the 75Ω load). The glitch ...

Page 11

U U APPLICATIONS INFORMATION 75Ω 750Ω OFF 750Ω ⇒ 75Ω 750Ω OFF 750Ω R1 CABLE 75Ω 750Ω ON 750Ω Figure 5. Off Channels Load the Cable Termination with 1575Ω Each 1V RED 1 INPUT 0V 1V ...

Page 12

LT1675/LT1675-1 U TYPICAL APPLICATIO S RED 97.6Ω VIDEO IN GREEN 97.6Ω BLUE 97.6Ω 5V 10k 1.25V 0.714V LT1634 10k This circuit is useful for viewing photographic negatives on video. A single channel can be used for composite or monochrome video. ...

Page 13

U TYPICAL APPLICATIO S RED 75Ω VIDEO IN GREEN BLUE 75Ω SELECT A SELECT B OUTPUT VIDEO, 100% WHITE 0 1 VIDEO PLUS 66% WHITE 1 0 VIDEO PLUS 33% WHITE 1 1 VIDEO, NO WHITE SELECT ...

Page 14

LT1675/LT1675 PLIFIED SCHE ATIC ENABLE LOGIC SELECT GND 14 (LT1675-1, LT1675 One Channel) V RED 1 RED 2 – V OFF + – + RED V – OUT 750Ω 750Ω + – V ...

Page 15

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 16

... Performance Upgrade for the LT1259/LT1260 www.linear.com ● LT1675 + V CABLE 75Ω OUT BLUE 75Ω CABLE 75Ω OUT RED 75Ω CABLE 75Ω OUT GREEN 75Ω – V SELECT ENABLE COMPOSITE 1675 TA04 SYNC LT/LT 0605 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1998 16751fb ...

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