Data Sheet

PCA9507
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
Rev. 01 — 7 February 2008
Product data sheet
1. General description
The PCA9507 is a 2-wire serial bus extender providing 3.3 V to 5 V level shift that allows
up to 18 meters bus extension for reliable DDC, I2C-bus or SMBus applications. While
retaining all the operating modes and features of the I2C-bus system during the level
shifts, it also permits extension of the I2C-bus by providing bidirectional buffering for both
the data (SDA) and the clock (SCL) line as well as the rise time accelerator on port A
enabling the bus to drive a load up to 1400 pF or distance of 18 m on port A, and 400 pF
on port B. Using the PCA9507 enables the system designer to isolate bus capacitance to
meet HDMI DDC version 1.3 distance specification. The SDA and SCL pins are
overvoltage tolerant and are high-impedance when the PCA9507 is unpowered.
The port B drivers with static level offset behave much like the drivers on the PCA9515
device, while the port A drivers integrate the rise time accelerator, sink more current and
eliminate the static offset voltage. This results in a LOW on port B translating into a nearly
0 V LOW on port A. The static level offset design of the port B I/O drivers prevent them
from being connected to another device that has rise time accelerator including the
PCA9510, PCA9511, PCA9512, PCA9513, PCA9514, PCA9515, PCA9516A, PCA9517
(B-side), or PCA9518. The port A sides of two or more PCA9507s can be connected
together, however, to allow a star topography with port A on the common bus, and port A
can be connected directly to any other buffer with static or dynamic offset voltage. Multiple
PCA9507s can be connected in series, port A to port B, with no build-up in offset voltage
with only time of flight delays to consider. Rise time accelerator on port A is turned on
when input threshold is above 0.3VCC(A).
The PCA9507 drivers are not enabled unless VCC(A) and VCC(B) are above 2.7 V. The EN
pin can also be used to turn the drivers on and off under system control. Caution should
be observed to only change the state of the enable pin when the bus is idle. The output
pull-down on the port B internal buffer LOW is set for approximately 0.5 V, while the input
threshold of the internal buffer is set about 70 mV lower (0.43 V). When the port B I/O is
driven LOW internally, the LOW is not recognized as a LOW by the input. This prevents a
lock-up condition from occurring.
2. Features
n 2 channel, bidirectional buffer isolates capacitance allowing 1400 pF on port A and
400 pF on port B
n Exceeds 18 meters (above the maximum distance for HDMI DDC)
n Rise time accelerator and normal I/O on port A
n Static level offset on port B
n Voltage level translation from 2.7 V to 5.5 V
n Upgrade replacement over PCA9517 for cable application
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
n
n
n
n
n
n
n
n
n
n
n
I2C-bus, SMBus and DDC-bus compatible
Active HIGH buffer enable input
Open-drain input/outputs
Lock-up free operation
Supports arbitration and clock stretching across the repeater
Accommodates Standard-mode and Fast-mode I2C-bus devices and multiple masters
Powered-off high-impedance I2C-bus pins
Port A operating supply voltage range of 2.7 V to 5.5 V
Port B operating supply voltage range of 2.7 V to 5.5 V
5 V tolerant I2C-bus and enable pins
0 Hz to 400 kHz clock frequency (the maximum system operating frequency may be
less than 400 kHz because of the delays added by the repeater)
n ESD protection exceeds 5000 V HBM per JESD22-A114, 400 V MM per
JESD22-A115, and 1000 V CDM per JESD22-C101
n Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
n Packages offered: SO8 and TSSOP8
3. Ordering information
Table 1.
Ordering information
Type number
Topside
mark
Package
Name
Description
Version
PCA9507D
PCA9507
SO8
plastic small outline package; 8 leads;
body width 3.9 mm
SOT96-1
PCA9507DP
9507
TSSOP8[1] plastic thin shrink small outline package;
8 leads; body width 3 mm
[1]
SOT505-1
Also known as MSOP8.
4. Functional diagram
VCC(A)
VCC(B)
VCC(A)
DYNAMIC
PULL-UP
SDAA
SDAB
VCC(A)
DYNAMIC
PULL-UP
SCLA
SCLB
VCC(B)
100 kΩ
PCA9507
EN
GND
Fig 1.
Functional diagram of PCA9507
PCA9507_1
Product data sheet
002aad401
© NXP B.V. 2008. All rights reserved.
Rev. 01 — 7 February 2008
2 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
5. Pinning information
5.1 Pinning
VCC(A)
1
8
VCC(B)
SCLA
2
7
SCLB
SDAA
3
6
SDAB
GND
4
5
EN
VCC(A)
1
8
VCC(B)
SCLA
2
7
SCLB
SDAA
3
6
SDAB
GND
4
5
EN
PCA9507D
002aad400
002aad399
Fig 2.
Pin configuration for SO8
PCA9507DP
Fig 3.
Pin configuration for TSSOP8
5.2 Pin description
Table 2.
Pin description
Symbol
Pin
Description
VCC(A)
1
port A supply voltage (2.7 V to 5.5 V)
SCLA
2
serial clock port A bus with rise time accelerator for DDC line or cable,
5 V tolerant
SDAA
3
serial data port A bus with rise time accelerator for DDC line or cable,
5 V tolerant
GND
4
supply ground (0 V)
EN
5
active HIGH buffer enable input
SDAB
6
serial data port B bus with static level offset, 5 V tolerant
SCLB
7
serial clock port B bus with static level offset, 5 V tolerant
VCC(B)
8
port B supply voltage (2.7 V to 5.5 V)
6. Functional description
Refer to Figure 1 “Functional diagram of PCA9507”.
The PCA9507 consists of a pair of bidirectional open-drain I/Os specifically designed to
support up-translation/down-translation between low voltages (as low as 2.7 V) and a
3.3 V or 5 V I2C-bus and SMBus. The device contains a rise time accelerator on port A
that enables the device to drive a long cable or a heavier capacitive load for DDC, I2C-bus
and SMBus applications. With dual supply rails, the device translates from voltage ranges
2.7 V to 5.5 V down to a voltage as low as 2.7 V without degradation of system
performance. All I/Os are overvoltage tolerant to 5.5 V even when the device is
un-powered (VCC(B) and/or VCC(A) = 0 V).
The PCA9507 includes a power-up circuit that keeps the output drivers turned off until
VCC(A) and VCC(B) rise above 2.7 V. VCC(A) and VCC(B) can be applied in any sequence at
power-up.
PCA9507_1
Product data sheet
© NXP B.V. 2008. All rights reserved.
Rev. 01 — 7 February 2008
3 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
VCC(B)
port B
0.3VCC(B)
0.5 V
0.4 V
0V
VCC(A)
port A
0.7VCC(A)
0.3VCC(A)
0V
002aad435
Fig 4.
Port A and port B I/O levels
When port B falls first and goes below 0.3VCC(B) the port A driver is turned on and port A
pulls down to 0 V. As port A falls below 0.3VCC(A) the port B pull-down pulls port B down to
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 ≤ 0.4 V the port A driver of the
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 ~0.3VCC(A)
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
~0.7VCC(A). Then it continues to rise at the slower rate determined by the RC of port A.
When the port B driver turns off, port B rises with the RC of port B.
VCC(A) powers the port A I/Os and the 0.3VCC(A) reference for port A as well as the port A
power good detect circuit. VCC(B) powers the rest of the chip including the port B I/Os and
the support functions. Figure 4 illustrates the threshold and I/O levels for port A and
port B.
6.1 Enable
The EN pin is active HIGH with an internal ~100 kΩ pull-up to VCC(B) and allows the user
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 I2C-bus operation
because disabling during a bus operation will hang the bus and enabling part way through
a bus cycle could confuse the I2C-bus parts being enabled. The enable pin should only
change state when the global bus and the buffer port are in an idle state to prevent system
failures.
6.2 Rise time accelerators
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 0.3VCC(A) is exceeded for the PCA9507 and turns off as the 0.7VCC(A)
voltage is approached.
PCA9507_1
Product data sheet
© NXP B.V. 2008. All rights reserved.
Rev. 01 — 7 February 2008
4 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
6.3 Resistor pull-up value selection
6.3.1 Port A (SDAA and SCLA)
SDAA and SCLA are open-drain I/O that have rise time accelerators and strong pull-down.
When the inputs transition above 0.3VCC(A), the rise time accelerator activates and boosts
the pull-up current during rising edge to meet the I2C-bus rise time specification when the
device drives a long cable or heavier capacitance load. The strong pull-down enables the
output to drive to nearly zero voltage for logic LOW. The selection for pull-up resistors are
defined in the HDMI DDC specification shown in Table 3. For HDMI transmitter
applications like digital video player, recorder, or set-top box, the pull-up resistor is in the
range of 1.5 kΩ to 2 kΩ. For HDMI receiver applications like in LCD TV or video card, the
pull-up resistor is 47 kΩ on the SCLA line, and there is no pull-up on the SDAA line.
Please refer to Table 3, Figure 7 and Figure 8 for more details. Figure 5 shows the port A
pull-up resistor values (in kΩ) versus capacitance load (in nF) for 5 V supply voltage
complied with 1 µs rise time per I2C-bus Standard-mode specification. The graph
contrasts a shaded and unshaded region. Any resistor value chosen within the unshaded
region would comply with 1 µs rise time, while any value chosen in the shaded region
would not.
Table 3.
HDMI DDC pull-up resistors specification
Pin
Where
Minimum
Maximum
SDAA
at the source (DVD/STB)
1.5 kΩ
2.0 kΩ
at the sink (LCD TV)
-
-
at the source (DVD/STB)
1.5 kΩ
2.0 kΩ
SCLA
47 kΩ ± 10 %
at the sink (LCD TV)
002aad620
10.5
RPU
(kΩ)
8.5
6.5
does not comply with
1 µs rise time
4.5
complies with
1 µs rise time
2.5
0.5
0
1.0
2.0
3.0
4.0
CL (nF)
rise time = 1 µs; VCC(A) = 5 V
Fig 5.
SDAA/SCLA line pull-up resistor versus load capacitance
PCA9507_1
Product data sheet
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Rev. 01 — 7 February 2008
5 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
6.3.2 Port B (SDAB and SCLB)
SDAB and SCLB are standard I2C-bus with static level offset that has no rise time
accelerator. The static level offset produces an output LOW of 0.5 V (typical) at 6 mA. As
with the standard I2C-bus system, pull-up resistors are required to provide the logic HIGH
levels. The size of these pull-up resistors depends on the system requirement, and should
meet the current sinking capability of the device that drives the buffer, as well as that of
the buffer. The minimum and maximum pull-up resistors are determined and the pull-up
resistor’s value is chosen to be within the minimum and maximum range.
Using Equation 1, calculate the minimum pull-up resistor value:
V CC ( B ) ( max ) – 0.4 V
R PU ( min ) = -----------------------------------------------I OL ( max )
(1)
Where:
RPU(min) is the minimum pull-up resistor value for the open-drain SCLB and SDAB.
VCC(B)(max) is the maximum supply rail of the pull-up resistor.
0.4 V is the maximum VOL of the device that drives the buffer on logic LOW.
IOL(max) at VOL = 0.4 V is the maximum sink current of the device that drives the buffer
on logic LOW.
The maximum pull-up resistor should also be sized such that the RC time constant meets
the standard I2C-bus rise time, which is 1 µs for Standard-mode (100 kHz) or 300 ns for
Fast-mode (400 kHz). DDC bus complies with the I2C-bus Standard-mode and operates
below 100 kHz, and maximum rise time is 1 µs using a simplified RC equation.
Using Equation 2, calculate the maximum pull-up resistor value:
R PU ( max ) × C L ( max ) = 1.2 × t r
(2)
Where:
RPU(max) is the maximum allowable pull-up resistor on the SCLB and SDAB in order to
meet the I2C-bus rise time specification.
CL(max) is the maximum allowable capacitance load (include the capacitance of driver,
the line, and the buffer) in order to meet the rise time specification.
tr is the rise time specified as 1 µs (for bus speed 100 kHz or lower) and 300 ns (for bus
speed 400 kHz or lower).
The chosen pull-up resistor RPU is: RPU(min) ≤ RPU ≤ RPU(max).
PCA9507_1
Product data sheet
© NXP B.V. 2008. All rights reserved.
Rev. 01 — 7 February 2008
6 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
7. Application design-in information
A typical application is shown in Figure 6. In this example, the system master is running
on a 3.3 V I2C-bus while the slave is connected to a 5 V bus. Both buses run at 400 kHz.
Master devices can be placed on either bus. HDMI DDC applications for DVD/R and
LCD TV are shown in Figure 7 and Figure 8, respectively. In these applications the HDMI
transmitter or receiver is 3.3 V, while the DDC line is 5 V, PCA9507 behaves like a voltage
level shift, a buffer and long cable bus extender to ensure signal integrity for accessing the
EDID on the DDC line.
3.3 V
10 kΩ
5V
10 kΩ
10 kΩ
VCC(B)
SDA
SDAB
SDAA
SDA
SCL
BUS
MASTER
400 kHz
SCLB
SCLA
SCL
PCA9507
SLAVE
400 kHz
EN
bus B
Fig 6.
bus A
002aad403
Typical application
3.3 V
10 kΩ
(optional)
10 kΩ
VCC(A)
5V
10 kΩ
10 kΩ
0.1 µF
0.1 µF
VCC(B)
1.5 kΩ
to
2.0 kΩ
VCC(A)
PCA9507
SDAB
SCLB
EN
HDMI
TRANSMITTER
1.5 kΩ
to
2.0 kΩ
HDMI cable
DDC line
22 Ω
SDAA
SCLA
LCD TV (sink)
PCA9507
PCA9512A
PCA9517
PCA9515
22 Ω
GND
DVD/R or STB
002aad404
Fig 7.
Source or DVD/R, STB application
3.3 V
10 kΩ
(optional)
5V
10 kΩ
10 kΩ
0.1 µF
0.1 µF
VCC(B)
VCC(A)
PCA9507
HDMI
RECEIVER
47 kΩ
SDAB
SCLB
EN
SDAA
SCLA
22 Ω
22 Ω
GND
HDMI cable
DDC line
DVD (source)
PCA9507
PCA9512A
PCA9517
PCA9515
LCD TV
002aad405
Fig 8.
Sink or LCD TV application
PCA9507_1
Product data sheet
© NXP B.V. 2008. All rights reserved.
Rev. 01 — 7 February 2008
7 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
According to Figure 6, when port A of the PCA9507 is pulled LOW by a driver on the
I2C-bus, a comparator detects the falling edge when it goes below 0.3VCC(A) and causes
the internal driver on port B to turn on, causing port B to pull down to about 0.5 V. When
port B of the PCA9507 falls, first a CMOS hysteresis type input detects the falling edge
and causes the internal driver on port A to turn on and pull the port A pin down to ground.
In order to illustrate what would be seen in a typical application, refer to Figure 11 and
Figure 12.
If the bus master in Figure 6 were to write to the slave through the PCA9507, waveforms
shown in Figure 11 would be observed on the A bus. This looks like a normal I2C-bus
transmission except that the HIGH level may be as low as 2.7 V, and the turn on and turn
off of the acknowledge signals are slightly delayed.
The master drives the B bus to ground or lets it float to VCC(B) as it sends data to the slave
at the falling edge of the 8th clock, master releases SDAB on the B bus and slave pulls
SDAA on the A bus to ground, causing the PCA9507 to pull SDAB on the B bus to 0.5 V.
At the falling edge of the 9th clock, the master again drives the B bus and slave releases
the A bus.
Multiple PCA9507 port A sides can be connected in a star configuration (Figure 9),
allowing all nodes to communicate with each other.
Multiple PCA9507s can be connected in series (Figure 10) as long as port A is connected
to port B. I2C-bus slave devices can be connected to any of the bus segments. The
number of devices that can be connected in series is limited by repeater
delay/time-of-flight considerations on the maximum bus speed requirements.
PCA9507_1
Product data sheet
© NXP B.V. 2008. All rights reserved.
Rev. 01 — 7 February 2008
8 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
VCC(A)
10 kΩ
VCC(B)
10 kΩ
10 kΩ
VCC(A)
10 kΩ
VCC(B)
SDA
SDAA
SDAB
SDA
SCL
SCLA
SCLB
SCL
BUS
MASTER
SLAVE
400 kHz
PCA9507
EN
10 kΩ
10 kΩ
VCC(A)
VCC(B)
SDAA
SDAB
SDA
SCLA
SCLB
SCL
SLAVE
400 kHz
PCA9507
EN
10 kΩ
10 kΩ
VCC(A)
VCC(B)
SDAA
SDAB
SDA
SCLA
SCLB
SCL
SLAVE
400 kHz
PCA9507
EN
002aad406
Fig 9.
Typical star application
VCC
10 kΩ
10 kΩ
10 kΩ
10 kΩ
10 kΩ
10 kΩ
10 kΩ
10 kΩ
SDA
SDAA
SDAB
SDAA
SDAB
SDAA
SDAB
SDA
SCL
SCLA
SCLB
SCLA
SCLB
SCLA
SCLB
SCL
BUS
MASTER
PCA9507
EN
PCA9507
EN
PCA9507
EN
SLAVE
400 kHz
002aad407
Fig 10. Typical series application
PCA9507_1
Product data sheet
© NXP B.V. 2008. All rights reserved.
Rev. 01 — 7 February 2008
9 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
9th clock pulse
acknowledge
SCLA
SDAA
002aad431
Fig 11. Bus A (2.7 V to 5.5 V bus) waveform
9th clock pulse
acknowledge
SCLB
SDAB
VOL of PCA9507
002aad408
VOL of slave
Fig 12. Bus B (2.7 V to 5.5 V) waveform
8. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Conditions
Min
Max
Unit
VCC(B)
supply voltage port B
2.7 V to 5.5 V
−0.5
+7
V
VCC(A)
supply voltage port A
adjustable
−0.5
+7
V
VI/O
voltage on an input/output pin
port B; enable pin (EN)
−0.5
+7
V
II/O
input/output current
port A; port B
-
50
mA
II
input current
EN, VCC(A), VCC(B), GND
-
50
mA
Ptot
total power dissipation
-
100
mW
Tstg
storage temperature
−55
+125
°C
Tamb
ambient temperature
−40
+85
°C
Tj
junction temperature
-
+125
°C
operating in free air
PCA9507_1
Product data sheet
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Rev. 01 — 7 February 2008
10 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
9. Static characteristics
Table 5.
Static characteristics
VCC = 2.7 V to 5.5 V; GND = 0 V; Tamb = −40 °C to +85 °C; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Supplies
VCC(B)
supply voltage port B
VCC(A)
supply voltage port A
2.7
-
5.5
V
2.7
-
5.5
V
ICC(VCC(A))
supply current on pin VCC(A)
-
-
1
mA
ICCH(B)
port B HIGH-level supply current
both channels HIGH; VCC = 5.5 V;
SDAn = SCLn = VCC
-
1.5
5
mA
ICCL(B)
port B LOW-level supply current
both channels LOW; VCC = 5.5 V;
one SDA and one SCL = GND;
other SDA and SCL open
-
1.5
5
mA
ICCL(A)
port A LOW-level supply current
both channels LOW; VCC = 5.5 V;
one SDA and one SCL = GND;
other SDA and SCL open
-
1.5
5
mA
ICC(B)c
contention port B supply current
VCC(B) = 5.5 V;
SDAB = SCLB = 0.2 V
-
1.5
5
mA
0.7VCC(B) -
5.5
V
−0.5
-
+0.3VCC(B) V
−0.5
0.4
-
V
[1]
Input and output SDAB and SCLB
VIH
HIGH-level input voltage
[2]
VIL
LOW-level input voltage
VILc
contention LOW-level input
voltage
VIK
input clamping voltage
II = −18 mA
-
-
−1.2
V
ILI
input leakage current
VI = 5.5 V
-
-
±1
µA
IIL
LOW-level input current
SDA, SCL; VI = 0.2 V
-
-
10
µA
VOL
LOW-level output voltage
IOL = 100 µA or 6 mA
0.47
0.52
0.6
V
VOL−VILc
difference between LOW-level
output and LOW-level input
voltage contention
guaranteed by design
-
-
70
mV
Cio
input/output capacitance
VI = 3 V or 0 V; VCC = 3.3 V
-
6
7
pF
VI = 3 V or 0 V; VCC = 0 V
-
6
7
pF
Input and output SDAA and SCLA
VIH
HIGH-level input voltage
VIL
LOW-level input voltage
VIK
input clamping voltage
ILI
input leakage current
IIL
LOW-level input current
SDA, SCL; VI = 0.2 V
-
-
10
µA
VOL
LOW-level output voltage
IOL = 6 mA
-
0.1
0.2
V
Cio
input/output capacitance
VI = 3 V or 0 V; VCC = 3.3 V
-
-
7
pF
VI = 3 V or 0 V; VCC = 0 V
-
6
7
pF
VCC(A) = 4.5 V;
slew rate = 1.25 V/µs
-
6
-
mA
Itrt(pu)
transient boosted pull-up current
0.7VCC(A) -
5.5
V
−0.5
-
+1.5
V
II = −18 mA
-
-
−1.2
V
VCC = VI = 5.5 V
-
-
±1
µA
[3]
PCA9507_1
Product data sheet
© NXP B.V. 2008. All rights reserved.
Rev. 01 — 7 February 2008
11 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
Table 5.
Static characteristics …continued
VCC = 2.7 V to 5.5 V; GND = 0 V; Tamb = −40 °C to +85 °C; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
−0.5
-
+0.3VCC(B) V
Enable
VIL
LOW-level input voltage
VIH
HIGH-level input voltage
5.5
V
IIL(EN)
LOW-level input current on pin
EN
VI = 0.2 V, EN; VCC = 3.6 V
0.7VCC(B) -
−10
−30
µA
ILI
input leakage current
VI = VCC
−1
-
+1
µA
Ci
input capacitance
VI = 3.0 V or 0 V
-
6
7
pF
[1]
LOW-level supply voltage.
[2]
VIL specification is for the first LOW level seen by the SDAB/SCLB lines. VILc is for the second and subsequent LOW levels seen by the
SDAB/SCLB lines.
[3]
VIL for port A with envelope noise must be below 0.3VCC(A) for stable performance.
10. Dynamic characteristics
Table 6.
Dynamic characteristics
VCC = 2.7 V to 5.5 V; GND = 0 V; Tamb = −40 °C to +85 °C; unless otherwise specified.[1][2]
Symbol
Parameter
Conditions
tPLH
LOW-to-HIGH propagation delay
port B to port A; Figure 15
tPHL
HIGH-to-LOW propagation delay
port B to port A; Figure 13
tTLH
LOW to HIGH output transition time port A; Figure 13
tTHL
HIGH to LOW output transition time port A; Figure 13
[4]
tPLH
LOW-to-HIGH propagation delay
port A to port B; Figure 14
[5]
tPHL
HIGH-to-LOW propagation delay
port A to port B; Figure 14
[5]
tTLH
LOW to HIGH output transition time port B; Figure 14
tTHL
HIGH to LOW output transition time port B; Figure 14
tsu
set-up time
EN HIGH before START condition
[6]
th
hold time
EN HIGH after STOP condition
[6]
Min
Typ[3]
Max
Unit
90
165
350
ns
55
91
180
ns
22
48
80
ns
20
42
100
ns
140
218
310
ns
130
91
330
ns
100
173
260
ns
20
39
100
ns
100
-
-
ns
100
-
-
ns
[1]
Times are specified with loads of 1.35 kΩ pull-up resistance and 57 pF load capacitance on port B, and 450 Ω pull-up resistance and
57 pF load capacitance on port A. Different load resistance and capacitance will alter the RC time constant, thereby changing the
propagation delay and transition times.
[2]
Pull-up voltages are VCC(A) on port A and VCC(B) on port B.
[3]
Typical values were measured with VCC(A) = 3.3 V at Tamb = 25 °C, unless otherwise noted.
[4]
The tPLH delay data from port B to port A is measured at 0.5 V on port B to 0.3VCC(A) on port A.
[5]
The proportional delay data from port A to port B is measured at 0.3VCC(A) on port A to 0.3VCC(B) on port B.
[6]
The enable pin, EN, should only change state when the global bus and the repeater port are in an idle state.
PCA9507_1
Product data sheet
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Rev. 01 — 7 February 2008
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PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
10.1 AC waveforms
VCC(B)
input
0.3VCC(B)
tPHL
80 %
output
VCC(A)
0.3VCC(B)
tTHL
0.3VCC(A)
0.1 V
tPLH
0.3VCC(A) 0.3VCC(A)
20 %
20 %
input
80 %
tTLH
0.3VCC(A)
tPHL
1.2 V
80 %
tPLH
0.3VCC(B) 0.3VCC(B)
20 %
20 %
output
VOL
tTHL
VCC(B)
tTLH
002aad432
Fig 13. Propagation delay and transition times;
port B to port A
80 %
002aad433
Fig 14. Propagation delay and transition times;
port A to port B
input
SDAB, SCLB
0.5 V
output
SCLA, SDAA
0.3VCC(A)
tPLH
002aad434
Fig 15. Propagation delay
11. Test information
VCC(B)
VCC(B)
VCC(A)
PULSE
GENERATOR
VI
RL
VO
DUT
CL
RT
002aab649
RL = load resistor; 1.35 kΩ on port B (2.7 V to 5 V) and 450 Ω on port A (2.7 V to 5.5 V).
CL = load capacitance includes jig and probe capacitance; 57 pF.
RT = termination resistance should be equal to Zo of pulse generators.
Fig 16. Test circuit for open-drain outputs
PCA9507_1
Product data sheet
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Rev. 01 — 7 February 2008
13 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
12. Package outline
SO8: plastic small outline package; 8 leads; body width 3.9 mm
SOT96-1
D
E
A
X
c
y
HE
v M A
Z
5
8
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
1
L
4
e
detail X
w M
bp
0
2.5
5 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (2)
e
HE
L
Lp
Q
v
w
y
Z (1)
mm
1.75
0.25
0.10
1.45
1.25
0.25
0.49
0.36
0.25
0.19
5.0
4.8
4.0
3.8
1.27
6.2
5.8
1.05
1.0
0.4
0.7
0.6
0.25
0.25
0.1
0.7
0.3
inches
0.069
0.010 0.057
0.004 0.049
0.01
0.019 0.0100
0.014 0.0075
0.20
0.19
0.16
0.15
0.05
0.01
0.01
0.004
0.028
0.012
0.244
0.039 0.028
0.041
0.228
0.016 0.024
θ
8o
o
0
Notes
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
2. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT96-1
076E03
MS-012
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-18
Fig 17. Package outline SOT96-1 (SO8)
PCA9507_1
Product data sheet
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Rev. 01 — 7 February 2008
14 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
TSSOP8: plastic thin shrink small outline package; 8 leads; body width 3 mm
D
E
SOT505-1
A
X
c
y
HE
v M A
Z
5
8
A2
pin 1 index
(A3)
A1
A
θ
Lp
L
1
4
detail X
e
w M
bp
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D(1)
E(2)
e
HE
L
Lp
v
w
y
Z(1)
θ
mm
1.1
0.15
0.05
0.95
0.80
0.25
0.45
0.25
0.28
0.15
3.1
2.9
3.1
2.9
0.65
5.1
4.7
0.94
0.7
0.4
0.1
0.1
0.1
0.70
0.35
6°
0°
Notes
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-04-09
03-02-18
SOT505-1
Fig 18. Package outline SOT505-1 (TSSOP8)
PCA9507_1
Product data sheet
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Rev. 01 — 7 February 2008
15 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
13. Soldering of SMD packages
This text provides a very brief insight into a complex technology. A more in-depth account
of soldering ICs can be found in Application Note AN10365 “Surface mount reflow
soldering description”.
13.1 Introduction to soldering
Soldering is one of the most common methods through which packages are attached to
Printed Circuit Boards (PCBs), to form electrical circuits. The soldered joint provides both
the mechanical and the electrical connection. There is no single soldering method that is
ideal for all IC packages. Wave soldering is often preferred when through-hole and
Surface Mount Devices (SMDs) are mixed on one printed wiring board; however, it is not
suitable for fine pitch SMDs. Reflow soldering is ideal for the small pitches and high
densities that come with increased miniaturization.
13.2 Wave and reflow soldering
Wave soldering is a joining technology in which the joints are made by solder coming from
a standing wave of liquid solder. The wave soldering process is suitable for the following:
• Through-hole components
• Leaded or leadless SMDs, which are glued to the surface of the printed circuit board
Not all SMDs can be wave soldered. Packages with solder balls, and some leadless
packages which have solder lands underneath the body, cannot be wave soldered. Also,
leaded SMDs with leads having a pitch smaller than ~0.6 mm cannot be wave soldered,
due to an increased probability of bridging.
The reflow soldering process involves applying solder paste to a board, followed by
component placement and exposure to a temperature profile. Leaded packages,
packages with solder balls, and leadless packages are all reflow solderable.
Key characteristics in both wave and reflow soldering are:
•
•
•
•
•
•
Board specifications, including the board finish, solder masks and vias
Package footprints, including solder thieves and orientation
The moisture sensitivity level of the packages
Package placement
Inspection and repair
Lead-free soldering versus SnPb soldering
13.3 Wave soldering
Key characteristics in wave soldering are:
• Process issues, such as application of adhesive and flux, clinching of leads, board
transport, the solder wave parameters, and the time during which components are
exposed to the wave
• Solder bath specifications, including temperature and impurities
PCA9507_1
Product data sheet
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Rev. 01 — 7 February 2008
16 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
13.4 Reflow soldering
Key characteristics in reflow soldering are:
• Lead-free versus SnPb soldering; note that a lead-free reflow process usually leads to
higher minimum peak temperatures (see Figure 19) than a SnPb process, thus
reducing the process window
• Solder paste printing issues including smearing, release, and adjusting the process
window for a mix of large and small components on one board
• Reflow temperature profile; this profile includes preheat, reflow (in which the board is
heated to the peak temperature) and cooling down. It is imperative that the peak
temperature is high enough for the solder to make reliable solder joints (a solder paste
characteristic). In addition, the peak temperature must be low enough that the
packages and/or boards are not damaged. The peak temperature of the package
depends on package thickness and volume and is classified in accordance with
Table 7 and 8
Table 7.
SnPb eutectic process (from J-STD-020C)
Package thickness (mm)
Package reflow temperature (°C)
Volume (mm3)
< 350
≥ 350
< 2.5
235
220
≥ 2.5
220
220
Table 8.
Lead-free process (from J-STD-020C)
Package thickness (mm)
Package reflow temperature (°C)
Volume (mm3)
< 350
350 to 2000
> 2000
< 1.6
260
260
260
1.6 to 2.5
260
250
245
> 2.5
250
245
245
Moisture sensitivity precautions, as indicated on the packing, must be respected at all
times.
Studies have shown that small packages reach higher temperatures during reflow
soldering, see Figure 19.
PCA9507_1
Product data sheet
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Rev. 01 — 7 February 2008
17 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
maximum peak temperature
= MSL limit, damage level
temperature
minimum peak temperature
= minimum soldering temperature
peak
temperature
time
001aac844
MSL: Moisture Sensitivity Level
Fig 19. Temperature profiles for large and small components
For further information on temperature profiles, refer to Application Note AN10365
“Surface mount reflow soldering description”.
14. Abbreviations
Table 9.
Abbreviations
Acronym
Description
CDM
Charged Device Model
CMOS
Complementary Metal Oxide Silicon
DDC
Display Data Channel
DVD
Digital Video Disc
EDID
Extended Display Identification Data
ESD
ElectroStatic Discharge
HBM
Human Body Model
HDMI
High-Definition Multimedia Interface
I2C-bus
Inter Integrated Circuit bus
LCD
Liquid Crystal Display
MM
Machine Model
SMBus
System Management Bus
STB
Set-Top Box
15. Revision history
Table 10.
Revision history
Document ID
Release date
Data sheet status
Change notice
Supersedes
PCA9507_1
20080207
Product data sheet
-
-
PCA9507_1
Product data sheet
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Rev. 01 — 7 February 2008
18 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
16. Legal information
16.1 Data sheet status
Document status[1][2]
Product status[3]
Definition
Objective [short] data sheet
Development
This document contains data from the objective specification for product development.
Preliminary [short] data sheet
Qualification
This document contains data from the preliminary specification.
Product [short] data sheet
Production
This document contains the product specification.
[1]
Please consult the most recently issued document before initiating or completing a design.
[2]
The term ‘short data sheet’ is explained in section “Definitions”.
[3]
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nxp.com.
16.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
16.3 Disclaimers
General — Information in this document is believed to be accurate and
reliable. However, NXP Semiconductors does not give any representations or
warranties, expressed or implied, as to the accuracy or completeness of such
information and shall have no liability for the consequences of use of such
information.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in medical, military, aircraft,
space or life support equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors accepts no liability for inclusion and/or use of
NXP Semiconductors products in such equipment or applications and
therefore such inclusion and/or use is at the customer’s own risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) may cause permanent
damage to the device. Limiting values are stress ratings only and operation of
the device at these or any other conditions above those given in the
Characteristics sections of this document is not implied. Exposure to limiting
values for extended periods may affect device reliability.
Terms and conditions of sale — NXP Semiconductors products are sold
subject to the general terms and conditions of commercial sale, as published
at http://www.nxp.com/profile/terms, including those pertaining to warranty,
intellectual property rights infringement and limitation of liability, unless
explicitly otherwise agreed to in writing by NXP Semiconductors. In case of
any inconsistency or conflict between information in this document and such
terms and conditions, the latter will prevail.
No offer to sell or license — Nothing in this document may be interpreted
or construed as an offer to sell products that is open for acceptance or the
grant, conveyance or implication of any license under any copyrights, patents
or other industrial or intellectual property rights.
16.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
I2C-bus — logo is a trademark of NXP B.V.
17. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
PCA9507_1
Product data sheet
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Rev. 01 — 7 February 2008
19 of 20
PCA9507
NXP Semiconductors
2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
18. Contents
1
2
3
4
5
5.1
5.2
6
6.1
6.2
6.3
6.3.1
6.3.2
7
8
9
10
10.1
11
12
13
13.1
13.2
13.3
13.4
14
15
16
16.1
16.2
16.3
16.4
17
18
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
Pinning information . . . . . . . . . . . . . . . . . . . . . . 3
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3
Functional description . . . . . . . . . . . . . . . . . . . 3
Enable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Rise time accelerators . . . . . . . . . . . . . . . . . . . 4
Resistor pull-up value selection . . . . . . . . . . . . 5
Port A (SDAA and SCLA) . . . . . . . . . . . . . . . . . 5
Port B (SDAB and SCLB) . . . . . . . . . . . . . . . . . 6
Application design-in information . . . . . . . . . . 7
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 10
Static characteristics. . . . . . . . . . . . . . . . . . . . 11
Dynamic characteristics . . . . . . . . . . . . . . . . . 12
AC waveforms. . . . . . . . . . . . . . . . . . . . . . . . . 13
Test information . . . . . . . . . . . . . . . . . . . . . . . . 13
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 14
Soldering of SMD packages . . . . . . . . . . . . . . 16
Introduction to soldering . . . . . . . . . . . . . . . . . 16
Wave and reflow soldering . . . . . . . . . . . . . . . 16
Wave soldering . . . . . . . . . . . . . . . . . . . . . . . . 16
Reflow soldering . . . . . . . . . . . . . . . . . . . . . . . 17
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 18
Legal information. . . . . . . . . . . . . . . . . . . . . . . 19
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 19
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Contact information. . . . . . . . . . . . . . . . . . . . . 19
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2008.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Date of release: 7 February 2008
Document identifier: PCA9507_1
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