MAX4549 Maxim, MAX4549 Datasheet

no-image

MAX4549

Manufacturer Part Number
MAX4549
Description
The MAX4548/MAX4549 serial-interface, programmable, triple 3x2 audio/video crosspoint switches are ideal for multimedia applications
Manufacturer
Maxim
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX4549EAX
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
MAX4549EAX+
Manufacturer:
MAX
Quantity:
77
The MAX4548/MAX4549 serial-interface, programmable,
triple 3x2 audio/video crosspoint switches are ideal for
multimedia applications. The devices include three
crosspoint switch matrices, each containing three inputs
and two outputs. To improve off-isolation, each switch
matrix has a shunt input and each output is selectively
programmable for clickless or regular-mode operation. A
selectable set of internal resistive voltage dividers sup-
plies DC bias for each output when using AC-coupled
inputs. To improve crosstalk, the voltage dividers include
four externally accessible bypass points.
The MAX4548/MAX4549 feature 35Ω max on-resis-
tance, 7Ω on-resistance matching between channels,
5Ω on-resistance flatness, and 0.07% total harmonic
distortion (THD). Additionally, they feature off-isolation
of -85dB at 20kHz and -72dB at 10MHz, with crosstalk
of -85dB at 20kHz and -55dB at 10MHz. The MAX4548
uses a 2-wire I
the MAX4549 uses a 3-wire SPI™/QSPI™/MICROWIRE™-
compatible serial interface. These parts are available in
36-pin SSOP packages and are specified for the
extended (-40°C to +85°C) operating range.
19-1496; Rev 0; 6/99
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Functional Diagram appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
I
2
MAX4548EAX
MAX4549EAX
C is a trademark of Philips Corp.
PART
Set-Top Boxes
PC Multimedia Boards
Video Conferencing Systems
High-End Audio Systems
Security Systems
Serially Controlled, Triple 3x2 Audio/Video
2
C™-compatible serial interface, while
________________________________________________________________ Maxim Integrated Products
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
Ordering Information
General Description
Applications
36 SSOP
36 SSOP
PIN-PACKAGE
( ) ARE FOR MAX4549
TOP VIEW
2Ω Typical On-Resistance Flatness
Selectable Soft-Switching Mode for “Clickless”
Audio Operation
22Ω Typical On-Resistance (+5V Supply)
5Ω Typical On-Resistance Matching Between
Channels
Audio Performance
Video Performance
Serial Interface
Single-Supply Operation from +2.7V to +5.5V
Crosspoint Switches
-85dB Off-Isolation at 20kHz
-85dB Crosstalk at 20kHz
0.07% THD with 600Ω Load
-72dB Off-Isolation at 10MHz
-55dB Crosstalk at 10MHz
2-Wire I
3-Wire SPI/QSPI/MICROWIRE-Compatible
SCL (SCLK)
SDA (DIN)
(MAX4549)
CBIASH
NO1C
NO2C
NO3C
NO1A
NO2A
N01B
N02B
N03A
N03B
GND
GND
SC
SA
SB
V+
2
10
11
12
13
14
15
16
17
18
C-Compatible (MAX4548)
1
2
3
4
5
6
7
8
9
MAX4548
MAX4549
SSOP
Pin Configuration
Features
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
19
20
CBIASL
COM1C
MID5
COM2C
GND
COM1A
MID1
COM1B
MID2
COM2A
MID3
COM2B
MID4
ABIASH
ABIASL
V+
A0 (CS)
A1 (DOUT)
1

Related parts for MAX4549

MAX4549 Summary of contents

Page 1

... DC bias for each output when using AC-coupled inputs. To improve crosstalk, the voltage dividers include four externally accessible bypass points. The MAX4548/MAX4549 feature 35Ω max on-resis- tance, 7Ω on-resistance matching between channels, 5Ω on-resistance flatness, and 0.07% total harmonic distortion (THD). Additionally, they feature off-isolation of -85dB at 20kHz and -72dB at 10MHz, with crosstalk of -85dB at 20kHz and -55dB at 10MHz ...

Page 2

... Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS— ...

Page 3

Serially Controlled, Triple 3x2 Audio/Video ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued) (V+ = +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL VIDEO PERFORMANCE Off-Isolation (Note 7) V ISO(V) ...

Page 4

Serially Controlled, Triple 3x2 Audio/Video Crosspoint Switches ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued) (V+ = +3V ±10 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL NO_ Off-Leakage ...

Page 5

Serially Controlled, Triple 3x2 Audio/Video I/O INTERFACE CHARACTERISTICS (V+ = +2.7V to +5.25V MIN MAX PARAMETER SYMBOL CS, SCL, SDA, A0, A1) DIGITAL INPUTS (SCLK, DIN, Input Low Voltage V Input High Voltage V ...

Page 6

... ON(MAX) ON(MIN) Note 5: Resistance flatness is defined as the difference between the maximum and minimum on-resistance values, as measured over the specified analog signal range. Note 6: Leakage parameters are 100% tested at maximum rated temperature and guaranteed by correlation at T Note 7: Off-isolation = 20log ( COM All timing is measured from the clock’ ...

Page 7

Serially Controlled, Triple 3x2 Audio/Video (V+ = +5V +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. TEMPERATURE 6.8 . 6.6 6.4 6.2 6.0 5.8 5.6 5.4 5.2 5.0 4.8 -40 - TEMPERATURE (°C) VIDEO ...

Page 8

Serially Controlled, Triple 3x2 Audio/Video Crosspoint Switches (V+ = +5V +25°C, unless otherwise noted.) A ON/OFF TIME vs. TEMPERATURE (HARD MODE) 300 TURN-ON TIME 250 200 TURN-ON TIME 150 TURN-OFF TIME, V+ ...

Page 9

... Serially Controlled, Triple 3x2 Audio/Video PIN NAME MAX4548 MAX4549 1 1 NO1C 2 2 CBIASH 3 3 NO2C NO3C NO1A 8 8 NO1B NO2A 11 11 NO2B NO3A 14 14 NO3B 15, 16, 32 15, 16, 32 GND 17 – SDA – ...

Page 10

... COM2A 28 28 MID2 29 29 COM1B 30 30 MID1 31 31 COM1A 33 33 COM2C 34 34 MID5 35 35 COM1C 36 36 CBIASL MAX4548 MAX4549 V+ 10nF V+ NO_ _ COM _ V NO_ DECODER/ P CONTROLLER SERIAL INTERFACE GND C INCLUDES FIXTURE AND STRAY CAPACITANCE OUT COM ...

Page 11

... The switches are indepen- dently controlled through the on-chip serial interface. The MAX4548 uses a 2-wire I munications protocol, while the MAX4549 uses a 3-wire SPI/QSPI/MICROWIRE-compatible serial communica- tions protocol. These ICs include twelve selectable bias-resistor net- ...

Page 12

... Controls the switch connected to NO1_ close switch open switch. The MAX4548/MAX4549 are divided into five functional blocks: the control-logic block, three switch-matrix blocks, and the bias-resistor block (see Functional Diagram ). The control-logic block accepts commands through the serial interface and uses those commands to control the four remaining blocks ...

Page 13

Serially Controlled, Triple 3x2 Audio/Video Command-Byte and Data-Byte The devices are programmed with a command byte and a data byte or data word (2 bytes). Each bit of the command byte selects one of the functional blocks to be controlled ...

Page 14

Serially Controlled, Triple 3x2 Audio/Video Crosspoint Switches Table 4. Clickless Mode Format (C7 = “1”) BIT D7 Don’t care D6 Don’t care D5 Controls COM2C clickless mode enables clickless mode disables clickless mode. D4 Controls COM1C ...

Page 15

Serially Controlled, Triple 3x2 Audio/Video CS SCLK 1 DIN C7 Figure 6. 3-Wire Serial-Interface Communication CS t CSS t CSH SCLK DIN t DV DOUT Figure 7. 3-Wire Serial-Interface Timing Details the same configuration. Any block ...

Page 16

... Segmented write cycles are allowed (three 8-bit-wide transfers remains low. The first bit clock into the MAX4549 is the command byte’s MSB, and the last bit clocked in is the data byte’s LSB. When programming the COM_ _ registers and the Clickless Mode register, the last eight bits of the data word are “ ...

Page 17

... SB 1 NO1C 3 NO2C 5 NO3C 15, 16, 32 GND 23 ABIASH 2 CBIASH 30 MID1 28 MID2 26 MID3 ( ) ARE FOR MAX4549 ______________________________________________________________________________________ Crosspoint Switches SWITCH MATRIX A SWITCH MATRIX B SWITCH MATRIX C CONTROL LOGIC BIAS RESISTOR NETWORK Functional Diagram 31 COM1A 27 COM2A MAX4548 MAX4549 29 COM1B 25 COM2B 35 COM1C 33 COM2C ...

Page 18

Serially Controlled, Triple 3x2 Audio/Video Crosspoint Switches ________________________________________________________Package Information 18 ______________________________________________________________________________________ Chip Information TRANSISTOR COUNT: 7700 SUBSTRATE IS INTERNALLY CONNECTED TO V+. ...

Page 19

Serially Controlled, Triple 3x2 Audio/Video ______________________________________________________________________________________ Crosspoint Switches NOTES 19 ...

Page 20

... Crosspoint Switches Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied ...

Related keywords