MAX4570 Maxim, MAX4570 Datasheet

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MAX4570

Manufacturer Part Number
MAX4570
Description
The MAX4550/MAX4570 serial-interface, programmable, dual 4x2 audio/video crosspoint switches are ideal for multimedia applications
Manufacturer
Maxim
Datasheet

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MAX4570CAI
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MAX4570EAI+
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Maxim Integrated Products
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The MAX4550/MAX4570 serial-interface, programma-
ble, dual 4x2 audio/video crosspoint switches are ideal
for multimedia applications. Each device contains two
identical crosspoint switch arrays, each with four inputs
and two outputs. To improve off-isolation, use the addi-
tional crosspoint inputs SA and SB as shunts. Each out-
put is selectively programmable for clickless or regular
mode operation. A set of internal resistive voltage-
dividers supplies DC bias for each output when using
AC-coupled inputs. Additionally, four auxiliary outputs
control additional circuitry via the MAX4550/MAX4570’s
2-wire or 3-wire interface.
The MAX4550/MAX4570 feature 80Ω on-resistance, 10Ω
on-resistance matching between channels, 5Ω on-
resistance flatness, and 0.014% total harmonic distor-
tion. Additionally, they feature off-isolation of at least
-110dB in the audio frequency range and -78dB at
4MHz, with -95dB crosstalk in the audio frequency
range and -54dB at 4MHz. The MAX4550 uses a 2-wire
I
uses a 3-wire SPI™/QSPI™ or MICROWIRE™-compati-
ble serial interface. These parts are available in 28-pin
SSOP and wide SO packages and are tested over
either the commercial (0°C to +70°C) or extended
(-40°C to +85°C) operating temperature range.
19-1397; Rev 0; 10/98
I
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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.
2
2
MAX4550CAI
MAX4550CWI
MAX4550EAI
MAX4550EWI
MAX4570CAI
MAX4570CWI
MAX4570EAI
MAX4570EWI
C is a trademark of Philips Corp.
C-compatible serial interface, while the MAX4570
Set-Top Boxes
PC Multimedia Boards
High-End Audio Systems
Video Conferencing Systems
PART
Audio/Video Analog Crosspoint Switches
________________________________________________________________ Maxim Integrated Products
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Serially Controlled, Dual 4x2, Clickless
Ordering Information
General Description
Applications
28 SSOP
28 Wide SO
28 SSOP
28 Wide SO
28 SSOP
28 Wide SO
28 SSOP
28 Wide SO
PIN-PACKAGE
Functional Diagram appears at end of data sheet.
Selectable Soft Switching Mode for Clickless
Audio Operation
43Ω Typical On-Resistance (±5V Supplies)
5Ω Typical On-Resistance Matching Between
Channels
4Ω Typical On-Resistance Flatness
0.014% Total Harmonic Distortion with 1kΩ Load
-110dB Off-Isolation at 20kHz
-78dB Off-Isolation at 4MHz
-95dB Crosstalk at 20kHz
-54dB Crosstalk at 4MHz
Serial Interface
2-Wire, Fast-Mode, I
3-Wire, SPI/QSPI/MICROWIRE-Compatible
(MAX4570)
Four Auxiliary Outputs that Extend µP Ports
Single-Supply Operation: +2.7V to +5.5V
Dual-Supply Operation: ±2.7V to ±5.5V
( ) ARE FOR MAX4570.
TOP VIEW
SCL (SCLK)
COM2A
COM2B
A0 (CS)
BIASH
BIASL
NO3A
NO3B
NO4A
NO4B
SB
Q0
Q1
V+
10
11
12
13
14
1
2
3
4
5
6
7
8
9
2
C-Compatible (MAX4550)
SO/SSOP
MAX4550
MAX4570
Pin Configuration
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SA
NO2B
NO2A
V-
V+
NO1B
NO1A
GND
COM1A
Q3
COM1B
Q2
A1 (DOUT)
SDA (DIN)
Features
1

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MAX4570 Summary of contents

Page 1

... AC-coupled inputs. Additionally, four auxiliary outputs control additional circuitry via the MAX4550/MAX4570’s 2-wire or 3-wire interface. The MAX4550/MAX4570 feature 80Ω on-resistance, 10Ω on-resistance matching between channels, 5Ω on- resistance flatness, and 0.014% total harmonic distor- tion. Additionally, they feature off-isolation of at least ...

Page 2

... SSOP (derate 9.52mW/°C above +70°C) .........762mW 28-Pin Wide SO (derate 12.5mW/°C above +70°C) ...1000mW Operating Temperature Ranges MAX4550C_I/MAX4570C_I ...............................-0°C to +70°C MAX4550E_I/MAX4570E_I ..............................-40°C to +85°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300° unless otherwise noted. Typical values are at T ...

Page 3

Serially Controlled, Dual 4x2, Clickless Audio/Video Analog Crosspoint Switches ANALOG ELECTRICAL CHARACTERISTICS—Dual Supplies (continued) (V+ = +5V ±5 -5V ±5 MIN PARAMETER SYMBOL VIDEO PERFORMANCE Off-Isolation V ISO(V) Channel-to-Channel Crosstalk V CT(V) 0.1dB Bandwidth ...

Page 4

Serially Controlled, Dual 4x2, Clickless Audio/Video Analog Crosspoint Switches ANALOG ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued) (V+ = +5V ±5 MIN MAX PARAMETER SYMBOL COM_ _ Off-Leakage Current I COM_ _(OFF) (Notes ...

Page 5

Serially Controlled, Dual 4x2, Clickless Audio/Video Analog Crosspoint Switches INTERFACE I/O CHARACTERISTICS (V+ = +2.7V to +5.5V -5.5V, T PARAMETER SYMBOL AUXILIARY OUTPUTS Output High Voltage V Output Low Voltage V CS, SCL, SDA) DIGITAL INPUTS ...

Page 6

... Time is measured with a 5kΩ load resistor to GND. All timing is shown with respect to 20 and 70% of V+, unless otherwise noted. Note 9: Typical values are for MAX4570 only. Note 10: Supply current can be as high as 2mA per switch during switch transitions in the clickless mode, corresponding to 40mA total supply transient current requirement ...

Page 7

Serially Controlled, Dual 4x2, Clickless Audio/Video Analog Crosspoint Switches (T = +25°C, unless otherwise noted.) A ON-RESISTANCE vs. V AND COM TEMPERATURE (SINGLE SUPPLY + +85° +70°C 65 ...

Page 8

Serially Controlled, Dual 4x2, Clickless Audio/Video Analog Crosspoint Switches (T = +25°C, unless otherwise noted.) A FREQUENCY RESPONSE 2 V± = ± 0 100 500 FREQUENCY (MHz) COM ...

Page 9

... Serially Controlled, Dual 4x2, Clickless Audio/Video Analog Crosspoint Switches PIN NAME MAX4550 MAX4570 NO3A 3 3 NO3B 4 4 BIASH 5 5 BIASL 6 6 NO4A 7 7 NO4B COM2A COM2B — — — SCL — ...

Page 10

... Applications Information The MAX4550/MAX4570 are divided into five functional blocks: the control-logic block, two switch-matrix blocks, the bias-resistor block, and the auxiliary-output block (see Functional Diagram ). The control-logic block accepts commands via the serial interface and uses those commands to control the four remaining blocks ...

Page 11

... LSB. While shifting data, the device remains in its original configuration. After all 16 bits are clocked into the input shift register, a rising edge on CS latches the data into the MAX4570 internal registers, initiating the device’s change of state. Start and Stop Conditions ...

Page 12

Serially Controlled, Dual 4x2, Clickless Audio/Video Analog Crosspoint Switches Table 5. 2-Wire Serial-Interface Data Format ADDRESS BYTE ...

Page 13

... Serially Controlled, Dual 4x2, Clickless Audio/Video Analog Crosspoint Switches Figures 3, 4, and Table 6 show the details of the 3-wire protocol applies to the MAX4570. DOUT is the shift register’s output. Data at DOUT is simply the input data delayed by 16 clock cycles, with data appearing synchronous with SCLK’ ...

Page 14

... Addressable Serial Interface To program several MAX4570s individually using a sin- gle processor, connect DIN of each MAX4570 together and control CS on each MAX4570 separately. To select a particular device, drive the corresponding CS low, clock in the 16-bit command, then drive CS high and execute the command. Typically, only one MAX4570 is addressed at a time ...

Page 15

... V- 21 GND SDA/(DIN) 14 SCL/(SCLK) CONTROL LOGIC 13 A0/(CS) 16 A1/(DOUT) SWITCH STATES SHOWN IN POWER-UP STATE. AUXILIARY OUTPUTS ARE LOW IN POWER-UP STATE ARE FOR MAX4570 ______________________________________________________________________________________ MAX4550 MAX4570 4 BIAS RESISTOR NETWORK 4 AUXILIARY OUTPUTS Functional Diagram 20 COM1A COM2A 9 18 COM1B COM2B 11 4 BIASH ...

Page 16

... Serially Controlled, Dual 4x2, Clickless Audio/Video Analog 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 implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. ...

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