pca9509 NXP Semiconductors, pca9509 Datasheet

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pca9509

Manufacturer Part Number
pca9509
Description
Level Translating I2c-bus/smbus Repeater
Manufacturer
NXP Semiconductors
Datasheet

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1. General description
2. Features
The PCA9509 is a level translating I
voltage 2-wire serial bus to interface with standard I
all the operating modes and features of the I
permits extension of the I
(SDA) and the clock (SCL) lines, thus enabling the I
capacitance of 400 pF on the higher voltage side. The SDA and SCL pins are over-voltage
tolerant and are high-impedance when the PCA9509 is unpowered.
The bus port B drivers are compliant with SMBus I/O levels, while port A uses a current
sensing mechanism to detect the input or output LOW signal which prevents bus lock-up.
Port A uses a 1 mA current source for pull-up and a 200
a LOW on the port A accommodating smaller voltage swings. The output pull-down on the
port A internal buffer LOW is set for approximately 0.2 V, while the input threshold of the
internal buffer is set about 50 mV lower than that of the output voltage LOW. When the
port A 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. The output pull-down on the port B drives a
hard LOW and the input level is set at 0.3 of SMBus or I
enables port B to connect to any other I
The PCA9509 drivers are not enabled unless V
2.5 V. The enable (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 EN pin when the bus
is idle.
I
I
I
I
I
I
I
I
I
I
I
PCA9509
Level translating I
Rev. 02 — 29 June 2007
Bidirectional buffer isolates capacitance and allows 400 pF on port B of the device
Voltage level translation from port A (1 V to V
Requires no external pull-up resistors on lower voltage port A
Active HIGH repeater enable input
Open-drain inputs/outputs
Lock-up free operation
Supports arbitration and clock stretching across the repeater
Accommodates Standard-mode and Fast-mode I
Powered-off high-impedance I
Operating supply voltage range of 1.0 V to V
port B
5 V tolerant port B SCL, SDA and enable pins
2
C-bus by providing bidirectional buffering for both the data
2
C-bus/SMBus repeater
2
C-bus pins
2
C-bus/SMBus repeater that enables processor low
2
C-bus devices or buffer.
2
C-bus system during the level shifts, it also
CC(A)
CC(B)
CC(B)
2
2
2
C-bus or SMBus I/O. While retaining
C-bus or SMBus maximum
is above 0.8 V and V
C-bus devices and multiple masters
1.0 V on port A, 3.0 V to 5.5 V on
2
1.0 V) to port B (3.0 V to 5.5 V)
C-bus voltage level which
pull-down driver. This results in
Product data sheet
CC(B)
is above

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pca9509 Summary of contents

Page 1

... I capacitance of 400 pF on the higher voltage side. The SDA and SCL pins are over-voltage tolerant and are high-impedance when the PCA9509 is unpowered. The bus port B drivers are compliant with SMBus I/O levels, while port A uses a current sensing mechanism to detect the input or output LOW signal which prevents bus lock-up ...

Page 2

... Packages offered: TSSOP8, SO8, XQFN8 3. Ordering information Table 1. Type number Topside PCA9509D PCA9509DP PCA9509GM [1] ‘X’ will change based on date code. 4. Functional diagram Fig 1. Functional diagram of PCA9509 PCA9509_2 Product data sheet Ordering information Package mark Name Description PCA9509 SO8 plastic small outline package; 8 leads; ...

Page 3

... Rev. 02 — 29 June 2007 2 Level translating I C-bus/SMBus repeater 1 V CC( PCA9509D A2 3 GND 4 002aac127 Fig 3. Pin configuration for SO8 PCA9509GM 002aac776 Transparent top view 2 C-bus side) PCA9509 8 V CC( © NXP B.V. 2007. All rights reserved ...

Page 4

... Bus repeaters that use an output offset are not interoperable with the port A of the PCA9509 as their output LOW levels will not be recognized by the PCA9509 as a LOW. If the PCA9509 is placed in an application where the V go below its V port B will return HIGH will not reproduce the port A input on port B ...

Page 5

... Figure 5 would be observed on the B bus. This looks like a normal I On the A bus side of the PCA9509, the clock and data lines would have a positive offset from ground equal to the V be pulled to the V the end of the acknowledge, the level rises only to the LOW level set by the driver in the PCA9509 for a short delay while the B bus side rises above 0 ...

Page 6

... A port B; enable pin (EN) input/output current input current total power dissipation storage temperature ambient temperature operating in free air junction temperature solder point temperature 10 s max. Rev. 02 — 29 June 2007 PCA9509 2 Level translating I C-bus/SMBus repeater V of PCA9509 OL Min Max 0.5 +6.0 0.5 +6.0 0.5 +6.0 0.5 +6 100 65 +150 ...

Page 7

... 0 5.0 V. CC(B) is for the static LOW levels seen by the port A input resulting in ILc Rev. 02 — 29 June 2007 PCA9509 2 Level translating I C-bus/SMBus repeater [1] Min Typ Max 3.0 - 5.5 1 CC(B) 0.25 0.45 0.9 1.25 3.0 5 0.5 0.9 1.1 0. CC(A) CC(A) [2] ...

Page 8

... A to port B; measured from the initial LOW on port A to 1.5 V rising on port B port A to port B port B port B EN HIGH before START condition EN HIGH after STOP condition Rev. 02 — 29 June 2007 PCA9509 2 C-bus/SMBus repeater . Below V of about 0.7 V the CC(B) CC(A) Min Typ Max ...

Page 9

... Rev. 02 — 29 June 2007 2 Level translating I C-bus/SMBus repeater input 0.5V 0.5V CC(A) CC( PHL PLH 70 % 0.5V 0.5V CC(B) output CC( THL port A to port B 002aab648 V CC(B) V CC(B) V CC( DUT 002aab649 of pulse generators o PCA9509 V CC(A) V CC( TLH 002aab647 © NXP B.V. 2007. All rights reserved ...

Page 10

... C-bus/SMBus repeater detail 6.2 1.0 0.7 1.05 0.25 0.25 5.8 0.4 0.6 0.039 0.028 0.041 0.01 0.01 0.016 0.024 EUROPEAN PROJECTION PCA9509 SOT96 ( 0.7 0 0.028 0.004 0.012 ISSUE DATE 99-12-27 03-02-18 © NXP B.V. 2007. All rights reserved ...

Page 11

... 0.45 0.28 3.1 3.1 0.65 0.25 0.15 2.9 2.9 REFERENCES JEDEC JEITA Rev. 02 — 29 June 2007 2 Level translating I C-bus/SMBus repeater detail 5.1 0.7 0.94 0.1 0.1 0.1 4.7 0.4 EUROPEAN PROJECTION PCA9509 SOT505 (1) Z 0.70 6 0.35 0 ISSUE DATE 99-04-09 03-02-18 © NXP B.V. 2007. All rights reserved ...

Page 12

... 1.65 0.35 0.15 0.55 0.5 0.1 1.55 0.25 0.05 REFERENCES JEDEC JEITA MO-255 - - - Rev. 02 — 29 June 2007 2 Level translating I C-bus/SMBus repeater detail 0.05 0.05 0.05 EUROPEAN PROJECTION PCA9509 SOT902 ISSUE DATE 05-11-16 05-11-25 © NXP B.V. 2007. All rights reserved ...

Page 13

... Solder bath specifications, including temperature and impurities PCA9509_2 Product data sheet Level translating I Rev. 02 — 29 June 2007 PCA9509 2 C-bus/SMBus repeater © NXP B.V. 2007. All rights reserved ...

Page 14

... Lead-free process (from J-STD-020C) Package reflow temperature ( C) 3 Volume (mm ) < 350 260 260 250 Figure 15. Rev. 02 — 29 June 2007 PCA9509 2 Level translating I C-bus/SMBus repeater Figure 15) than a PbSn process, thus 350 220 220 350 to 2000 > 2000 260 260 250 245 ...

Page 15

... Central Processing Unit ElectroStatic Discharge Human Body Model Input/Output Inter-Integrated Circuit bus Machine Model Negative-channel Metal Oxide Semiconductor Resistor-Capacitor network System Management Bus Rev. 02 — 29 June 2007 PCA9509 2 Level translating I C-bus/SMBus repeater peak temperature 001aac844 © NXP B.V. 2007. All rights reserved. time ...

Page 16

... Product data sheet Data sheet status Change notice Product data sheet - Table 1 “Ordering outline”) Product data sheet - Rev. 02 — 29 June 2007 PCA9509 2 Level translating I C-bus/SMBus repeater Supersedes PCA9509_1 information”, Section 5.1 “Pinning”, - © NXP B.V. 2007. All rights reserved ...

Page 17

... Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners C-bus — logo is a trademark of NXP B.V. http://www.nxp.com salesaddresses@nxp.com Rev. 02 — 29 June 2007 PCA9509 2 Level translating I C-bus/SMBus repeater © NXP B.V. 2007. All rights reserved ...

Page 18

... 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. 2007. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com PCA9509 C-bus/SMBus repeater All rights reserved. Date of release: 29 June 2007 Document identifier: PCA9509_2 ...

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