PCA9507D,118 NXP Semiconductors, PCA9507D,118 Datasheet - Page 4

• Manufacturer Part Number: PCA9507D,118
• Description: I/O Expanders, Repeaters & Hubs LEVEL TRANSL I2C BUS
• Manufacturer: NXP Semiconductors
• Series: -r

Specifications of PCA9507D,118

• Logic Family: SDA, SCL
• Propagation Delay Time: 218 ns
• Operating Supply Voltage: 2.7 V to 5.5 V
• Power Dissipation: 100 mW
• Operating Temperature Range: - 40 C to + 85 C
• Logic Type: I2C Bus
• Mounting Style: SMD/SMT
• Output Current: 50 mA
• Output Voltage: 0.52 V
• Package / Case: SO-8
• Mounting Type: Surface Mount
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Interface: I²C, SMBus
• Number Of I /o: 24
• Frequency - Clock: 400kHz
• Interrupt Output: No
• Includes: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 935285823118 PCA9507D-T

NXP Semiconductors
PCA9507_1
Product data sheet
6.1 Enable
6.2 Rise time accelerators
When port B falls first and goes below 0.3V
pulls down to 0 V. As port A falls below 0.3V
about 0.5 V. Port B falls below 0.4 V because it is not possible to know who is driving the
port A LOW, so the PCA9507 direction control assumes that port A is controlling the part
unless port B falls below 0.4 V. When the port B voltage is
PCA9507 is on and holds port A down nearly 0 V. As the port B voltage rises because the
external driver turns off, the port B voltage rises up to ~0.5 V because port A is LOW;
once port B rises to ~0.5 V the port A pull-down driver turns off. Then port A rises with a
rise time determined by the RC of port A when it crosses the port A threshold ~0.3V
the port B driver is turned off and the rising edge accelerator is turned on, which causes a
faster rising edge until it reaches the turn-off point for the rising edge accelerator
~0.7V
When the port B driver turns off, port B rises with the RC of port B.
V
power good detect circuit. V
the support functions.
port B.
The EN pin is active HIGH with an internal ~100 k pull-up to V
to select when the buffer is active. This can be used to isolate the line when the HDMI
DDC transmitter or receiver is not ready, or from a badly behaved slave on power-up until
after the system power-up reset. It should never change state during an I
because disabling during a bus operation will hang the bus and enabling part way through
a bus cycle could confuse the I
change state when the global bus and the buffer port are in an idle state to prevent system
failures.
PCA9507 has rise time accelerators on port A only. During port A positive bus transitions
a current source is switched on to quickly slew the SDAA and SCLA lines HIGH once the
input level of 0.3V
voltage is approached.
Fig 4.
CC(A)
CC(A)
powers the port A I/Os and the 0.3V
Port A and port B I/O levels
. Then it continues to rise at the slower rate determined by the RC of port A.
CC(A)
Rev. 01 — 7 February 2008
Figure 4
is exceeded for the PCA9507 and turns off as the 0.7V
V
V
0.3V
2-wire serial bus extender for HDMI DDC I
CC(B)
CC(A)
0.3V
CC(B)
CC(B)
CC(A)
2
illustrates the threshold and I/O levels for port A and
C-bus parts being enabled. The enable pin should only
powers the rest of the chip including the port B I/Os and
0.4 V
port B
port A
CC(A)
CC(B)
CC(A)
reference for port A as well as the port A
the port A driver is turned on and port A
the port B pull-down pulls port B down to
0.5 V
0.7V
002aad435
CC(A)
0.4 V the port A driver of the
0 V
0 V
CC(B)
and allows the user
2
PCA9507
C-bus and SMBus
© NXP B.V. 2008. All rights reserved.
2
C-bus operation
CC(A)
4 of 20
CC(A)