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PCA9542PWDH 데이터시트 PDF




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부품번호 PCA9542PWDH 기능
기능 2-channel I2C multiplexer and interrupt controller
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PCA9542PWDH 데이터시트, 핀배열, 회로
INTEGRATED CIRCUITS
PCA9542
2-channel I2C multiplexer and interrupt
controller
Product specification
1999 Oct 07
Philips
Semiconductors




PCA9542PWDH pdf, 반도체, 판매, 대치품
Philips Semiconductors
2-channel I2C multiplexer and interrupt controller
Product specification
PCA9542
CHANNEL SELECTION
A SC0x/SD0x downstream pair, or channel, is selected by the
contents of the control register. This register is written after the
PCA9542 has been addressed. The 3 LSBs of the control byte are
used to determine which channel is to be selected. When a channel
is selected, the channel will become active after a stop condition has
been placed on the I2C bus. This ensures that all SCx/SDx lines will
be in a HIGH state when the channel is made active, so that no
false conditions are generated at the time of connection.
CONTROL BYTE
7 6 5 4 3 210
X X X X X 0XX
X X X X X 100
X X X X X 101
SELECTED
CHANNEL
none
0 (SC0/SD0)
1 (SC1/SD1)
CONTROL REGISTER
7 6 5 43 2 1 0
X X INT1 INT0 X B2 B1 B0
Interrupt bits
(read only)
Channel select bits
(read/write)
SW00477
INTERRUPT HANDLING
The PCA9542 provides 2 interrupt inputs, one for each channel and
one open drain interrupt output. When an interrupt is generated by any
device, it will be detected by the PCA9542 and the interrupt output
will be driven LOW. The channel need not be active for detection of
the interrupt. A bit is also set in the control byte.
Bits 4 – 5 of the control byte correspond to channels 0 – 1 of the
PCA9542, respectively. Therefore, if an interrupt is generated by any
device connected to channel 1, then bit 5 will be set in the control
register. Likewise, an interrupt on any device connected to channel 0
would cause bit 4 of the control register to be set. The master can
then address the PCA9542 and read the contents of the control byte
to determine which channel contains the device generating the
interrupt. The master can then reconfigure the PCA9542 to select this
channel, and locate the device generating the interrupt and clear it.
It should be noted that more than one device can be providing an
interrupt on a channel, so it is up to the master to ensure that all
devices on a channel are interrogated for an interrupt.
7
6
5
4
3
21
0
INTERRUPTING
CHANNEL
0 0 0 1 X X X X 0 (SC0/SD0)
0 0 1 0 X X X X 1 (SC1/SD1)
POWER-ON RESET
During power-up, the control register defaults to all zeroes causing
all the channels to be deselected.
1999 Oct 07
4

4페이지










PCA9542PWDH 전자부품, 판매, 대치품
Philips Semiconductors
2-channel I2C multiplexer and interrupt controller
Product specification
PCA9542
ABSOLUTE MAXIMUM RATINGS1, 2
In accordance with the Absolute Maximum Rating System (IEC 134).Voltages are referenced to GND (ground = 0 V).
SYMBOL
PARAMETER
CONDITIONS
RATING
UNIT
VDD DC supply voltage
–0.5 to +7.0
V
VI DC input voltage
–0.5 to +7.0
V
II DC input current
±20 mA
IO DC output current
±25 mA
IDD Supply current
±100
mA
ISS Supply current
±100
mA
Ptot total power dissipation
400 mW
Tstg Storage temperature range
–60 to +150
°C
Tamb
Operating ambient temperature
0 to +70
°C
NOTES:
1. Stresses beyond those listed 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 under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.
DC CHARACTERISTICS
VDD = 2.5 to 3.6 V; VSS = 0 V; Tamb = 0°C to +70°C; unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
LIMITS
MIN TYP
MAX
UNIT
Supply
VDDQn VDD Supply voltage
IDD Supply current
Istb Standby current
VPOR
Power-on reset voltage
Input SCL; input/output SDA
Operating mode; VDD = 3.6 V;
no load; VI = VDD or VSS;
fSCL = 100 kHz
Standby mode; VDD = 3.6 V;
no load; VI = VDD or VSS
VDD = 3.6 V; no load;
VI = VDD or VSS
2.5 3.6 V
– 20 100 µA
– 2.5 100 µA
– 1.3 2.1
V
VIL LOW level input voltage
VIH HIGH level input voltage
IOL LOW level output current
IL Leakage current
Ci Input capacitance
Select inputs A0 to A2 / INT0 to INT3
VOL = 0.4 V
VOL = 0.6 V
VI = VDD or VSS
VI = VSS
–0.5
0.7 VDD
3
6
–1
0.3 VDD
6
+1
10
V
V
mA
µA
pF
VIL
VIH
ILI
Pass Gate
LOW level input voltage
HIGH level input voltage
Input leakage current
pin at VDD or VSS
–0.5
– +0.3 VDD V
0.7 VDD – VDD + 0.5 V
–1 –
+1 µA
RON
Switch resistance
VPass
IL
INT Output
Switch output voltage
Leakage current
VCC = 3.67 V, VO = 0.4 V, IO = 15 mA
5 20 30
VCC = 2.3 to 2.7 V, VO = 0.4V, IO = 10 mA 7 26 55
Vswin = VDD = 3.3 V; Iswout = –100 µA
2.2
Vswin = VDD = 3.0 to 3.6 V; Iswout = –100 µA
Vswin = VDD = 2.5 V; Iswout = –100 µA
1.6
1.5
2.8
V
Vswin = VDD = 2.3 to 2.7 V; Iswout = –100 µA
1.1
2.0
VI = VDD or VSS
–1 –
+1 µA
IOL LOW level output current
IL Leakage current
VOL = 0.4 V
VI = VDD or VSS
3–
–1 –
– mA
+1 µA
1999 Oct 07
7

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부품번호상세설명 및 기능제조사
PCA9542PWDH

2-channel I2C multiplexer and interrupt controller

NXP Semiconductors
NXP Semiconductors

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