MAX4571CAI+ Maxim Integrated Products, MAX4571CAI+ Datasheet - Page 11

• Manufacturer Part Number: MAX4571CAI+
• Description: IC AUDIO/VIDEO SWITCH 11 28SSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX4571CAI+

• Function: Audio/Video Switch
• Circuit: 11P11T - NO
• On-state Resistance: 35 Ohm
• Voltage Supply Source: Single Supply
• Voltage - Supply, Single/dual (±): 2.7 V ~ 5.25 V
• Current - Supply: 6µA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• On Resistance (max): 90 Ohms at 2.7 V
• On Time (max): 900 ns at 3 V
• Off Time (max): 300 ns at 3 V
• Supply Voltage (max): 5.25 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Maximum Power Dissipation: 762 mW
• Switch Configuration: SPST
• Switch Current (typ): 0.006 mA at 5 V at 0 C to + 70 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 1. Command Bit Mapping
Table 2. Data-Bit Switch Control
X = Don’t care
communicating with the slave, it issues a stop condition
by transitioning SDA from low to high while SCL is high.
The bus is then free for another transmission.
The MAX4573/MAX4574 use a 3-wire SPI/QSPI/
MICROWIRE-compatible serial interface. An active-low
chip-select pin, CS, enables the device to receive data
from the serial input pin, DIN. Command and data infor-
mation are clocked in on the rising edge of the serial-
clock signal (SCLK) MSB first. A total of 16 bits are
needed in each write cycle. The write cycle allows two
8-bit-wide transfers if CS remains low for the entire 16
bits. The command code is contained in the two MSBs
of the 16-bit word. The remaining bits control the
switches as shown in Table 4. While shifting in the seri-
al data, the device remains in its original configuration.
A rising edge on CS latches the data into the
MAX4573/MAX4574 internal registers, initiating the
device’s change of state. Table 4 shows the details of
the 3-wire interface data structure.
DATA BIT
D0 (LSB)
MSB
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
0
0
1
1
______________________________________________________________________________________
SWITCH
MSB - 1
SW11
SW10
SW9
SW8
SW7
SW6
SW5
SW4
SW3
SW2
SW1
X
X
X
0
1
0
1
3-Wire Serial Interface
MAX4571/MAX4573
SWITCH TERMINALS
SWITCHSET
COMMAND
MODESET
NO_OP
RESET
Serially Controlled, Clickless
15, 16
17, 18
19, 20
21, 22
13, 14
11, 12
9, 10
7, 8
5, 6
3, 4
1, 2
X
X
X
Figures 5 and 6 and the I/O Interface Characteristics
show the timing details of the 3-wire interface. If the
two command bits initiate a SWITCHSET command, a
logic 1 in a switch control location closes the associat-
ed switch, while a logic 0 opens it. If the command bits
initiate a MODESET command, a logic 1 in a switch
control location sets the associated switch into hard
mode, while a logic 0 sets it into soft, “clickless” mode.
For command-bit configurations, see Table 1.
There are two ways to connect multiple devices to the
same 3-wire serial interface. The first involves using the
DOUT pin. DOUT presents a copy of the last bit of the
internal shift register, useful for daisy-chaining multiple
devices. Data at DOUT are simply the input data
delayed by 16 clock cycles, appearing synchronous
with SCLK’s falling edge. After CS goes high, DOUT
holds the last bit in the shift register until new data are
shifted into DIN. For a simple interface using several
MAX4573/MAX4574 devices, daisy-chain the shift reg-
Audio/Video Switches
Sets all switches open and in soft switching mode.
Sets specified switches to soft or hard mode.
No Operation.
Sets specified switches open or closed.
SWITCH
SW7B
SW7A
SW6B
SW6A
SW4B
SW4A
SW3B
SW3A
SW2B
SW2A
SW1B
SW1A
SW8
SW5
MAX4572/MAX4574
DESCRIPTION
Using Multiple Devices
SWITCH TERMINALS
15, 16
13, 14
17, 18
18, 19
20, 21
21, 22
11, 12
10, 11
8, 9
7, 8
5, 6
4, 5
2, 3
1, 2
11