PCA9515ATP [NXP]
I2C-bus repeater; I2C总线中继器
| 型号： | PCA9515ATP |
| 厂家： | 
NXP |
| 描述： | I2C-bus repeater |
| 文件： | 总20页 (文件大小：222K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PCA9515A
I2C-bus repeater
Rev. 5 — 23 March 2012
Product data sheet
1. General description
The PCA9515A is a CMOS integrated circuit intended for application in I2C-bus and
SMBus systems.
While retaining all the operating modes and features of the I2C-bus system, it permits
extension of the I2C-bus by buffering both the data (SDA) and the clock (SCL) lines, thus
enabling two buses of 400 pF.
The I2C-bus capacitance limit of 400 pF restricts the number of devices and bus length.
Using the PCA9515A enables the system designer to isolate two halves of a bus, thus
more devices or longer length can be accommodated. It can also be used to run two
buses, one at 5 V and the other at 3.3 V or a 400 kHz and 100 kHz bus, where the
100 kHz bus is isolated when 400 kHz operation of the other is required.
Two or more PCA9515As cannot be put in series. The PCA9515A design does not
allow this configuration. Since there is no direction pin, slightly different ‘legal’ low voltage
levels are used to avoid lock-up conditions between the input and the output. A ‘regular
LOW’ applied at the input of a PCA9515A will be propagated as a ‘buffered LOW’ with a
slightly higher value. When this ‘buffered LOW’ is applied to another PCA9515A,
PCA9516A or PCA9518/A in series, the second PCA9515A, PCA9516A or PCA9518/A
will not recognize it as a ‘regular LOW’ and will not propagate it as a ‘buffered LOW’ again.
The PCA9510/A, PCA9511/A, PCA9512/A, PCA9513/A, PCA9514/A cannot be used in
series with the PCA9515A, PCA9516A or PCA9518/A, but can be used in series with
themselves since they use shifting instead of static offsets to avoid lock-up conditions.
The output pull-down of each internal buffer is set for approximately 0.5 V, while the input
threshold of each internal buffer is set about 0.07 V lower, when the output is internally
driven LOW. This prevents a lock-up condition from occurring.
2. Features and benefits
2-channel, bidirectional buffer
I2C-bus and SMBus compatible
Active HIGH repeater 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
Operating supply voltage range of 2.3 V to 3.6 V
5.5 V tolerant I2C-bus and enable pins
PCA9515A
NXP Semiconductors
I2C-bus repeater
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)
ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per
JESD22-C101
Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
Packages offered: SO8, TSSOP8 (MSOP8), HWSON8
3. Ordering information
Table 1.
Ordering information
Tamb = 40 C to +85 C.
Type number
Topside
mark
Package
Name
Description
Version
PCA9515AD
PA9515A SO8
plastic small outline package; 8 leads; body width 3.9 mm
SOT96-1
SOT505-1
PCA9515ADP 9515A
TSSOP8[1] plastic thin shrink small outline package; 8 leads;
body width 3 mm
PCA9515ATP 15A
HWSON8
plastic thermal enhanced very very thin small outline package;
SOT1069-2
no leads; 8 terminals; body 2 3 0.8 mm
[1] Also known as MSOP8.
4. Functional diagram
V
CC
PCA9515A
SDA0
SDA1
SCL0
EN
SCL1
pull-up
resistor
002aad738
GND
Fig 1. Functional diagram of PCA9515A
PCA9515A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 — 23 March 2012
2 of 20
PCA9515A
NXP Semiconductors
I2C-bus repeater
5. Pinning information
5.1 Pinning
1
2
3
4
8
7
6
5
n.c.
SCL0
SDA0
GND
V
CC
1
2
3
4
8
7
6
5
n.c.
SCL0
SDA0
GND
V
CC
SCL1
SDA1
EN
SCL1
SDA1
EN
PCA9515AD
PCA9515ADP
002aad737
002aad736
Fig 2. Pin configuration for SO8
Fig 3. Pin configuration for TSSOP8
(MSOP8)
terminal 1
index area
PCA9515ATP
SDA0
GND
EN
1
2
3
4
8
7
6
5
SCL0
n.c.
V
CC
SDA1
SCL1
002aag783
Transparent top view
Fig 4. Pin configuration for HWSON8
5.2 Pin description
Table 2.
Symbol
Pin description
Pin
Description
SO8, TSSOP8
HWSON8
n.c.
1
2
3
4
5
7
not connected
SCL0
SDA0
GND
EN
8
serial clock bus 0; open-drain 5 V tolerant I/O
serial data bus 0; open-drain 5 V tolerant I/O
supply ground (0 V)
1
2[1]
3
active HIGH repeater enable input
(internal pull-up with 100 k)
SDA1
SCL1
VCC
6
7
8
4
5
6
serial data bus 1; open-drain 5 V tolerant I/O
serial clock bus 1; open-drain 5 V tolerant I/O
supply voltage
[1] HWSON8 package die supply ground is connected to both GND pin and exposed center pad. GND pin
must be connected to supply ground for proper device operation. For enhanced thermal, electrical, and
board level performance, the exposed pad needs to be soldered to the board using a corresponding
thermal pad on the board and for proper head conduction through the board, thermal vias need to be
incorporated in the printed-circuit board in the thermal pad region.
PCA9515A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 — 23 March 2012
3 of 20
PCA9515A
NXP Semiconductors
I2C-bus repeater
6. Functional description
Refer to Figure 1 “Functional diagram of PCA9515A”.
The PCA9515A integrated circuit contains two identical buffer circuits which enable
I2C-bus and similar bus systems to be extended without degradation of system
performance.
The PCA9515A contains two bidirectional, open-drain buffers specifically designed to
support the standard LOW-level contention arbitration of the I2C-bus. Except during
arbitration or clock stretching, the PCA9515A acts like a pair of non-inverting, open-drain
buffers, one for SDA and one for SCL.
6.1 Enable
The EN pin is active HIGH with an internal pull-up and allows the user to select when the
repeater is active. This can be used to isolate 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 repeater port are in
an idle state to prevent system failures.
6.2 I2C-bus systems
As with the standard I2C-bus system, pull-up resistors are required to provide the logic
HIGH levels on the buffered bus (standard open-collector configuration of the I2C-bus).
The size of these pull-up resistors depends on the system, but each side of the repeater
must have a pull-up resistor. This part designed to work with Standard-mode and
Fast-mode I2C-bus devices in addition to SMBus devices. Standard-mode I2C-bus
devices only specify 3 mA output drive; this limits the termination current to 3 mA in a
generic I2C-bus system where Standard-mode devices and multiple masters are possible.
Under certain conditions higher termination currents can be used.
Please see Application Note AN255, I2C/SMBus Repeaters, Hubs and Expanders for
additional information on sizing resistors and precautions when using more than one
PCA9515A/PCA9516A in a system or using the PCA9515A/PCA9516A in conjunction
with the P82B96.
PCA9515A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 — 23 March 2012
4 of 20
PCA9515A
NXP Semiconductors
I2C-bus repeater
7. Application design-in information
A typical application is shown in Figure 5. 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 100 kHz
unless the slave bus is isolated and then the master bus can run at 400 kHz. Master
devices can be placed on either bus.
3.3 V
5 V
10 kΩ
10 kΩ
10 kΩ
10 kΩ
V
CC
SDA0
SCL0
SDA1
SCL1
SDA
SCL
BUS
MASTER
400 kHz
SDA
SCL
PCA9515A
SLAVE
100 kHz
EN
bus 0
bus 1
002aad739
Fig 5. Typical application
The PCA9515A is 5 V tolerant, so it does not require any additional circuitry to translate
between the different bus voltages.
When one side of the PCA9515A is pulled LOW by a device on the I2C-bus, a CMOS
hysteresis type input detects the falling edge and causes the internal driver on the other
side to turn on, thus causing the other side to also go LOW. The side driven LOW by the
PCA9515A will typically be at VOL = 0.5 V.
In order to illustrate what would be seen in a typical application, refer to Figure 6 and
Figure 7. If the bus master in Figure 5 were to write to the slave through the PCA9515A,
we would see the waveform shown in Figure 6 on bus 0. This looks like a normal I2C-bus
transmission until the falling edge of the eighth clock pulse. At that point, the master
releases the data line (SDA) while the slave pulls it LOW through the PCA9515A.
Because the VOL of the PCA9515A is typically round 0.5 V, a step in the SDA will be seen.
After the master has transmitted the ninth clock pulse, the slave releases the data line.
On the bus 1 side of the PCA9515A, the clock and data lines would have a positive offset
from ground equal to the VOL of the PCA9515A. After the eighth clock pulse the data line
will be pulled to the VOL of the slave device, which is very close to ground in this example.
It is important to note that any arbitration or clock stretching events on bus 1 require that
the VOL of the PCA9515A (see VOLVILc in Section 9 “Static characteristics”) to be
recognized by the PCA9515A and then transmitted to bus 0.
PCA9515A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 — 23 March 2012
5 of 20
PCA9515A
NXP Semiconductors
I2C-bus repeater
th
9
clock pulse
SCL
SDA
V
OL
of PCA9515A
V
OL
of master
002aad740
Fig 6. Bus 0 waveform
th
9
clock pulse
SCL
SDA
V
OL
of PCA9515A
V
of slave
002aad741
OL
Fig 7. Bus 1 waveform
8. Limiting values
Table 3.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Voltages with respect to pin GND.
Symbol
VCC
Parameter
Conditions
Min
0.5
0.5
-
Max
+7
Unit
V
supply voltage
I2C-bus voltage
VI2C-bus
II/O
SCL or SDA
DC; any pin
+7
V
input/output current
total power dissipation
storage temperature
ambient temperature
50
mA
mW
C
Ptot
-
100
+125
+85
Tstg
55
40
Tamb
operating in free air
C
PCA9515A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 — 23 March 2012
6 of 20
PCA9515A
NXP Semiconductors
I2C-bus repeater
9. Static characteristics
Table 4.
Static characteristics (VCC = 3.0 V to 3.6 V)
VCC = 3.0 V to 3.6 V[1]; GND = 0 V; Tamb = 40 C to +85 C; unless otherwise specified.
Symbol Parameter
Supplies
Conditions
Min
Typ[2] Max
Unit
VCC
ICCH
supply voltage
3.0
-
-
3.6
5
V
HIGH-level supply current
both channels HIGH;
VCC = 3.6 V;
0.8
mA
SDAn = SCLn = VCC
ICCL
LOW-level supply current
both channels LOW;
VCC = 3.6 V;
one SDA and one SCL = GND;
other SDA and SCL open
-
-
1.7
1.6
5
5
mA
mA
ICCLc
contention LOW-level supply current VCC = 3.6 V;
SDAn = SCLn = GND
Input SCLn; input/output SDAn
VIH
VIL
VILc
VIK
ILI
HIGH-level input voltage
LOW-level input voltage
contention LOW-level input voltage
input clamping voltage
0.7VCC
-
5.5
V
[3]
[3]
0.5
-
+0.3VCC
+0.4
1.2
+1
V
0.5
-
V
II = 18 mA
-
-
V
input leakage current
VI = 3.6 V
1
-
A
A
V
IIL
LOW-level input current
LOW-level output voltage
SDAn, SCLn; VI = 0.2 V
IOL = 20 A or 6 mA
-
-
5
VOL
0.47
-
0.52
-
0.6
VOLVILc difference between LOW-level output guaranteed by design
70
mV
and LOW-level input voltage
contention
Ci
input capacitance
VI = 3 V or 0 V
-
6
7
pF
Enable
VIL
LOW-level input voltage
HIGH-level input voltage
LOW-level input current on pin EN
input leakage current
0.5
2.0
-
-
+0.8
5.5
30
+1
V
VIH
-
V
IIL(EN)
ILI
VI = 0.2 V
10
A
A
pF
1
-
-
Ci
input capacitance
VI = 3.0 V or 0 V
6
7
[1] For operation between published voltage ranges (Table 4 for VCC = 3.0 V to 3.6 V; Table 5 for VCC = 2.3 V to 2.7 V), refer to worst-case
parameter in both ranges.
[2] Typical value taken at VCC = 3.3 V and Tamb = 25 C.
[3] VIL specification is for the first LOW level seen by the SDAn/SCLn lines. VILc is for the second and subsequent LOW levels seen by the
SDAn/SCLn lines.
PCA9515A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 — 23 March 2012
7 of 20
PCA9515A
NXP Semiconductors
I2C-bus repeater
Table 5.
V
Static characteristics (VCC = 2.3 V to 2.7 V)
CC = 2.3 V to 2.7 V[1]; GND = 0 V; Tamb = 40 C to +85 C; unless otherwise specified.
Symbol Parameter
Conditions
Min
Typ[2] Max
Unit
Supplies
VCC
supply voltage
2.3
-
-
2.7
5
V
ICCH
HIGH-level supply current
both channels HIGH;
VCC = 2.7 V;
0.8
mA
SDAn = SCLn = VCC
ICCL
LOW-level supply current
both channels LOW;
VCC = 2.7 V;
one SDA and one SCL = GND;
other SDA and SCL open
-
-
1.6
1.6
5
5
mA
mA
ICCLc
contention LOW-level supply current VCC = 2.7 V;
SDAn = SCLn = GND
Input SCLn; input/output SDAn
VIH
VIL
VILc
VIK
ILI
HIGH-level input voltage
LOW-level input voltage
contention LOW-level input voltage
input clamping voltage
0.7VCC
-
5.5
V
[3]
[3]
0.5
-
+0.3VCC
+0.4
1.2
+1
V
0.5
-
V
II = 18 mA
-
-
V
input leakage current
VI = 2.7 V
1
-
A
A
V
IIL
LOW-level input current
LOW-level output voltage
SDAn, SCLn; VI = 0.2 V
IOL = 20 A or 6 mA
-
-
10
VOL
0.47
-
0.52
-
0.6
VOLVILc difference between LOW-level output guaranteed by design
70
mV
and LOW-level input voltage
contention
Ci
input capacitance
VI = 3 V or 0 V
-
6
7
pF
Enable
VIL
LOW-level input voltage
HIGH-level input voltage
LOW-level input current on pin EN
input leakage current
0.5
2.0
-
-
+0.8
5.5
30
+1
V
VIH
-
V
IIL(EN)
ILI
VI = 0.2 V
10
A
A
pF
1
-
-
Ci
input capacitance
VI = 3.0 V or 0 V
6
7
[1] For operation between published voltage ranges (Table 4 for VCC = 3.0 V to 3.6 V; Table 5 for VCC = 2.3 V to 2.7 V), refer to worst-case
parameter in both ranges.
[2] Typical value taken at VCC = 2.5 V and Tamb = 25 C.
[3]
V
IL specification is for the first LOW level seen by the SDAn/SCLn lines. VILc is for the second and subsequent LOW levels seen by the
SDAn/SCLn lines.
PCA9515A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 — 23 March 2012
8 of 20
PCA9515A
NXP Semiconductors
I2C-bus repeater
10. Dynamic characteristics
Table 6.
Dynamic characteristics (VCC = 2.3 V to 2.7 V)
VCC = 2.3 V to 2.7 V; GND = 0 V; Tamb = 40 C to +85 C; unless otherwise specified.
Symbol Parameter
Conditions
Min
45
33
-
Typ[1] Max
Unit
ns
tPHL
tPLH
tTHL
tTLH
tsu
HIGH to LOW propagation delay
Figure 8
82
113
57
148
-
130
[2]
[2]
LOW to HIGH propagation delay
HIGH to LOW output transition time
LOW to HIGH output transition time
set-up time
Figure 8
190
ns
Figure 8
-
-
-
-
ns
Figure 8
-
ns
EN HIGH before START condition
EN HIGH after STOP condition
100
130
ns
th
hold time
-
ns
[1] Typical values taken at VCC = 2.5 V and Tamb = 25 C.
[2] Different load resistance and capacitance will alter the RC time constant, thereby changing the propagation delay and transition times.
Table 7.
Dynamic characteristics (VCC = 3.0 V to 3.6 V)
VCC = 3.0 V to 3.6 V; GND = 0 V; Tamb = 40 C to +85 C; unless otherwise specified.
Symbol Parameter
Conditions
Min
45
33
-
Typ[1] Max
Unit
ns
tPHL
tPLH
tTHL
tTLH
tsu
HIGH to LOW propagation delay
Figure 8
68
102
58
147
-
120
[2]
[2]
LOW to HIGH propagation delay
HIGH to LOW output transition time
LOW to HIGH output transition time
set-up time
Figure 8
180
ns
Figure 8
-
-
-
-
ns
Figure 8
-
ns
EN HIGH before START condition
EN HIGH after STOP condition
100
100
ns
th
hold time
-
ns
[1] Typical values taken at VCC = 3.3 V and Tamb = 25 C.
[2] Different load resistance and capacitance will alter the RC time constant, thereby changing the propagation delay and transition times.
10.1 AC waveforms
3.3 V
input
1.5 V
1.5 V
0.1 V
t
t
PLH
PHL
3.3 V
80 %
80 %
1.5 V
20 %
1.5 V
20 %
output
V
OL
t
t
TLH
THL
002aad478
Fig 8. Propagation delay and transition times
PCA9515A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 — 23 March 2012
9 of 20
PCA9515A
NXP Semiconductors
I2C-bus repeater
11. Test information
V
CC
V
CC
R
L
V
V
O
I
PULSE
GENERATOR
DUT
C
L
R
T
002aad479
RL = load resistor; 1.35 k
CL = load capacitance includes jig and probe capacitance; 50 pF
RT = termination resistance should be equal to Zo of pulse generators
Fig 9. Test circuit for open-drain outputs
PCA9515A
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 — 23 March 2012
10 of 20
PCA9515A
NXP Semiconductors
I2C-bus repeater
12. Package outline
SO8: plastic small outline package; 8 leads; body width 3.9 mm
SOT96-1
D
E
A
X
c
y
H
v
M
A
E
Z
5
8
Q
A
2
A
(A )
3
A
1
pin 1 index
θ
L
p
L
1
4
e
w
M
detail X
b
p
0
2.5
5 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
(1)
(1)
(2)
UNIT
A
A
A
b
c
D
E
e
H
L
L
p
Q
v
w
y
Z
θ
1
2
3
p
E
max.
0.25
0.10
1.45
1.25
0.49
0.36
0.25
0.19
5.0
4.8
4.0
3.8
6.2
5.8
1.0
0.4
0.7
0.6
0.7
0.3
mm
1.27
0.05
1.05
0.041
1.75
0.25
0.01
0.25
0.01
0.25
0.1
8o
0o
0.010 0.057
0.004 0.049
0.019 0.0100 0.20
0.014 0.0075 0.19
0.16
0.15
0.244
0.228
0.039 0.028
0.016 0.024
0.028
0.012
inches 0.069
0.01 0.004
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
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
JEITA
99-12-27
03-02-18
SOT96-1
076E03
MS-012
Fig 10. Package outline SOT96-1 (SO8)
PCA9515A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 — 23 March 2012
11 of 20
PCA9515A
NXP Semiconductors
I2C-bus repeater
TSSOP8: plastic thin shrink small outline package; 8 leads; body width 3 mm
SOT505-1
D
E
A
X
c
y
H
v
M
A
E
Z
5
8
A
(A )
2
A
3
A
1
pin 1 index
θ
L
p
L
1
4
detail X
e
w M
b
p
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
A
(1)
(2)
(1)
A
A
A
b
c
D
E
e
H
E
L
L
p
UNIT
v
w
y
Z
θ
1
2
3
p
max.
0.15
0.05
0.95
0.80
0.45
0.25
0.28
0.15
3.1
2.9
3.1
2.9
5.1
4.7
0.7
0.4
0.70
0.35
6°
0°
mm
1.1
0.65
0.25
0.94
0.1
0.1
0.1
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.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
JEITA
99-04-09
03-02-18
SOT505-1
Fig 11. Package outline SOT505-1 (TSSOP8)
PCA9515A
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 5 — 23 March 2012
12 of 20
PCA9515A
NXP Semiconductors
I2C-bus repeater
HWSON8: plastic thermal enhanced very very thin small outline package; no leads;
8 terminals; body 2 x 3 x 0.8 mm
SOT1069-2
X
D
B
A
E
A
2
A
A
1
A
3
terminal 1
index area
detail X
e
1
C
terminal 1
index area
v
C A
C
B
e
b
y
y
w
C
1
1
4
L
K
E
2
8
5
D
2
0
1
2 mm
K
scale
Dimensions
Unit
(1)
(1)
(1)
A
A
A
A
b
D
D
2
E
E
e
e
1
L
v
w
y
y
1
1
2
3
2
max 0.80 0.05 0.65
mm nom 0.75 0.02 0.55 0.2 0.25 2.0 1.5 3.0 1.5 0.5 1.5 0.35 0.40 0.1 0.05 0.05 0.05
min 0.70 0.00 0.45 0.18 1.9 1.4 2.9 1.4 0.30 0.35
0.30 2.1 1.6 3.1 1.6
0.40 0.45
Note
1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.
sot1069-2_po
References
Outline
version
European
projection
Issue date
IEC
- - -
JEDEC
JEITA
- - -
09-10-22
09-11-18
SOT1069-2
MO-229
Fig 12. Package outline SOT1069-2 (HWSON8)
PCA9515A
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Product data sheet
Rev. 5 — 23 March 2012
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I2C-bus repeater
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
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Product data sheet
Rev. 5 — 23 March 2012
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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 13) 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 8 and 9
Table 8.
SnPb eutectic process (from J-STD-020C)
Package thickness (mm) Package reflow temperature (C)
Volume (mm3)
< 350
350
220
< 2.5
235
220
2.5
220
Table 9.
Lead-free process (from J-STD-020C)
Package thickness (mm) Package reflow temperature (C)
Volume (mm3)
< 350
260
350 to 2000
> 2000
260
< 1.6
260
250
245
1.6 to 2.5
> 2.5
260
245
250
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 13.
PCA9515A
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Product data sheet
Rev. 5 — 23 March 2012
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maximum peak temperature
= MSL limit, damage level
temperature
minimum peak temperature
= minimum soldering temperature
peak
temperature
time
001aac844
MSL: Moisture Sensitivity Level
Fig 13. 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 10. Abbreviations
Acronym
CDM
Description
Charged-Device Model
Complementary Metal-Oxide Semiconductor
ElectroStatic Discharge
Human Body Model
CMOS
ESD
HBM
I/O
Input/Output
I2C-bus
Inter-Integrated Circuit bus
System Management Bus
SMBus
PCA9515A
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Product data sheet
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15. Revision history
Table 11. Revision history
Document ID
PCA9515A v.5
Modifications:
Release date
Data sheet status
Change notice
Supersedes
20120323
Product data sheet
-
PCA9515A v.4
• Section 2 “Features and benefits”:
–
12th bullet item: deleted phrase “200 V MM per JESD22-A115”
–
14th bullet item: added “HWSON8” package
• Table 1 “Ordering information”: added Type number PCA9515ATP (HWSON8 package)
• Section 5.1 “Pinning”: added (new) Figure 4 “Pin configuration for HWSON8”
• Table 2 “Pin description”: added column for HWSON8 pinning
• Table 3 “Limiting values”:
–
Symbol/Parameter “Vbus, voltage on I2C-bus, SCL or SDA” changed to “VI2C-bus, I2C-bus
voltage” with “SCL or SDA” in Conditions column
–
Symbol/Parameter “I, DC current” changed to “II/O, input/output current”
• Table 4 “Static characteristics (VCC = 3.0 V to 3.6 V)”, Table note [1]: added phrase “(Table 4 for
VCC = 3.0 V to 3.6 V; Table 5 for VCC = 2.3 V to 2.7 V)”
• Table 5 “Static characteristics (VCC = 2.3 V to 2.7 V)”, Table note [1]: added phrase “(Table 4 for
VCC = 3.0 V to 3.6 V; Table 5 for VCC = 2.3 V to 2.7 V)”
• Section 12 “Package outline”: added (new) Figure 12 “Package outline SOT1069-2 (HWSON8)”
PCA9515A v.4
20080411
Product data sheet
-
PCA9515A v.3
PCA9515A v.3
20040929
Product data sheet
-
PCA9515A v.2
(9397 750 14098)
PCA9515A v.2
(9397 750 13709)
20040709
20040617
Product data sheet
Objective data sheet
-
-
PCA9515A v.1
-
PCA9515A v.1
(9397 98 13237)
PCA9515A
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Product data sheet
Rev. 5 — 23 March 2012
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I2C-bus repeater
16. Legal information
16.1 Data sheet status
Document status[1][2]
Product status[3]
Development
Definition
Objective [short] data sheet
This document contains data from the objective specification for product development.
This document contains data from the preliminary specification.
This document contains the product specification.
Preliminary [short] data sheet Qualification
Product [short] data sheet Production
[1]
[2]
[3]
Please consult the most recently issued document before initiating or completing a design.
The term ‘short data sheet’ is explained in section “Definitions”.
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.
Suitability for use — NXP Semiconductors products are not designed,
16.2 Definitions
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or 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 and its suppliers accept 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.
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.
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.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP Semiconductors
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the NXP
Semiconductors product is suitable and fit for the customer’s applications and
products planned, as well as for the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
NXP Semiconductors and its customer, unless NXP Semiconductors and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the NXP Semiconductors product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.
16.3 Disclaimers
Limited warranty and liability — 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. NXP Semiconductors takes no
responsibility for the content in this document if provided by an information
source outside of NXP Semiconductors.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Terms and conditions of commercial 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, unless otherwise
agreed in a valid written individual agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. NXP Semiconductors hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of NXP Semiconductors products by customer.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of NXP Semiconductors.
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.
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.
PCA9515A
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Product data sheet
Rev. 5 — 23 March 2012
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PCA9515A
NXP Semiconductors
I2C-bus repeater
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
own risk, and (c) customer fully indemnifies NXP Semiconductors for any
liability, damages or failed product claims resulting from customer design and
use of the product for automotive applications beyond NXP Semiconductors’
standard warranty and NXP Semiconductors’ product specifications.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific NXP Semiconductors product is automotive qualified,
the product is not suitable for automotive use. It is neither qualified nor tested
in accordance with automotive testing or application requirements. NXP
Semiconductors accepts no liability for inclusion and/or use of
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
non-automotive qualified products in automotive equipment or applications.
16.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards, customer
(a) shall use the product without NXP Semiconductors’ warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
NXP Semiconductors’ specifications such use shall be solely at customer’s
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: salesaddresses@nxp.com
PCA9515A
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Product data sheet
Rev. 5 — 23 March 2012
19 of 20
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NXP Semiconductors
I2C-bus repeater
18. Contents
1
2
3
4
General description. . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Ordering information. . . . . . . . . . . . . . . . . . . . . 2
Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
5
5.1
5.2
Pinning information. . . . . . . . . . . . . . . . . . . . . . 3
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3
6
6.1
6.2
Functional description . . . . . . . . . . . . . . . . . . . 4
Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
I2C-bus systems . . . . . . . . . . . . . . . . . . . . . . . . 4
7
Application design-in information . . . . . . . . . . 5
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 6
Static characteristics. . . . . . . . . . . . . . . . . . . . . 7
Dynamic characteristics . . . . . . . . . . . . . . . . . . 9
AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . 9
Test information. . . . . . . . . . . . . . . . . . . . . . . . 10
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 11
8
9
10
10.1
11
12
13
Soldering of SMD packages . . . . . . . . . . . . . . 14
Introduction to soldering . . . . . . . . . . . . . . . . . 14
Wave and reflow soldering . . . . . . . . . . . . . . . 14
Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 14
Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 15
13.1
13.2
13.3
13.4
14
15
Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 16
Revision history. . . . . . . . . . . . . . . . . . . . . . . . 17
16
Legal information. . . . . . . . . . . . . . . . . . . . . . . 18
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 18
Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 19
16.1
16.2
16.3
16.4
17
18
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. 2012.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 23 March 2012
Document identifier: PCA9515A
相关型号：
PCA9515DP-T
I2C-bus repeater - I2C-bus: 400 kHz; Inputs: 1 ; Operating temperature: -40~85 Cel; Operating voltage: 3.0~3.6 VDC; Outputs: 1
NXP
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