pca9517a NXP Semiconductors, pca9517a Datasheet

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pca9517a

Manufacturer Part Number
pca9517a
Description
Level Translating I2c-bus Repeater
Manufacturer
NXP Semiconductors
Datasheet

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1. General description
The PCA9517A is a CMOS integrated circuit that provides level shifting between low
voltage (down to 0.9 V) and higher voltage (2.7 V to 5.5 V) I
While retaining all the operating modes and features of the I
level shifts, it also permits extension of the I
both the data (SDA) and the clock (SCL) lines, thus enabling two buses of 400 pF. Using
the PCA9517A enables the system designer to isolate two halves of a bus for both voltage
and capacitance. The SDA and SCL pins are overvoltage tolerant and are
high-impedance when the PCA9517A is unpowered.
The 2.7 V to 5.5 V bus port B drivers behave much like the drivers on the PCA9515A
device, while the adjustable voltage bus port A drivers drive more current and eliminate
the static offset voltage. This results in a LOW on the port B translating into a nearly 0 V
LOW on the port A which accommodates smaller voltage swings of lower voltage logic.
The static offset design of the port B PCA9517A I/O drivers prevent them from being
connected to another device that has rise time accelerator including the PCA9510,
PCA9511, PCA9512, PCA9513, PCA9514, PCA9515A, PCA9516A, PCA9517A (port B),
or PCA9518. Port A of two or more PCA9517As 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 PCA9517As 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.
The PCA9517A drivers are not enabled unless V
2.5 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. The output pull-down on port A drives a hard
LOW and the input level is set at 0.3V
LOW level in systems where the low voltage side supply voltage is as low as 0.9 V.
Table 1.
[1]
[2]
Parameter
electrostatic discharge, HBM
electrostatic discharge, MM
PCA9517A
Level translating I
Rev. 02 — 5 May 2008
Will continue to be supported for existing designs and new designs where migrating to the PCA9517A is not
possible.
Highly recommended for all new designs due to improved I
PCA9517 and PCA9517A comparison
2
C-bus repeater
CC(A)
to accommodate the need for a lower
2
PCA9517
> 2 kV
> 200 V
C-bus by providing bidirectional buffering for
CC(A)
2
C-bus operation and ESD performance.
[1]
is above 0.8 V and V
2
C-bus or SMBus applications.
2
C-bus system during the
Product data sheet
PCA9517A
> 5.5 kV
> 450 V
CC(B)
[2]
is above

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pca9517a Summary of contents

Page 1

... LOW level in systems where the low voltage side supply voltage is as low as 0.9 V. Table 1. Parameter electrostatic discharge, HBM electrostatic discharge, MM [1] Will continue to be supported for existing designs and new designs where migrating to the PCA9517A is not possible. [2] Highly recommended for all new designs due to improved I 2 C-bus repeater ...

Page 2

... Table 2. Ordering information +85 C. amb Type number Topside Package mark Name PCA9517AD PA9517A SO8 PCA9517ADP 9517A TSSOP8 [1] Also known as MSOP8. PCA9517A_2 Product data sheet 2 C-bus pins 2 C-bus and enable pins Description plastic small outline package; 8 leads; body width 3.9 mm [1] plastic thin shrink small outline package ...

Page 3

... Pin description Table 3. Symbol V CC(A) SCLA SDAA GND EN SDAB SCLB V CC(B) PCA9517A_2 Product data sheet V CC(A) PCA9517A SDAA SCLA V CC(B) pull-up resistor EN Functional diagram of PCA9517A CC(A) CC(B) SCLA 2 7 SCLB PCA9517AD 3 6 SDAA SDAB 4 5 GND EN 002aad466 Pin configuration for SO8 Pin description Pin Description 1 port A supply voltage (0 ...

Page 4

... V, the port B pull-down driver is enabled and port B will only be able to rise to 0.5 V until port A rises above 0.3V the external pull-up resistor. The V the port A input comparators and for the power good detect circuit. The PCA9517A logic and all I/Os are powered by the V 6.1 Enable The EN pin is active HIGH with an internal pull- when the repeater is active ...

Page 5

... HIGH level may be as low as 0.9 V, and the turn on and turn off of the acknowledge signals are slightly delayed. On the B bus side of the PCA9517A, 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 PCA9517A for a short delay while the A bus side rises above 0 ...

Page 6

... CC(A) CC(B) SDAA SDAB SDA SCLA SCLB SCL PCA9517A SLAVE 400 kHz CC(A) CC(B) SDAA SDAB SDA SCLA SCLB SCL PCA9517A SLAVE 400 kHz CC(A) CC(B) SDAA SDAB SDA SCLA SCLB SCL PCA9517A SLAVE 400 kHz EN 002aad469 SDAA ...

Page 7

... SCL SDA Fig 9. PCA9517A_2 Product data sheet CARD 1 CARD Typical application of PCA9517A driving a short cable 9th clock pulse acknowledge Bus A (0 5.5 V bus) waveform 9th clock pulse acknowledge V of slave OL Bus B (2 5.5 V) waveform Rev. 02 — 5 May 2008 ...

Page 8

... T ambient temperature amb T junction temperature j PCA9517A_2 Product data sheet Conditions 2 5.5 V adjustable port B; enable pin (EN) port A; port B EN GND CC(A) CC(B) operating in free air Rev. 02 — 5 May 2008 PCA9517A 2 Level translating I C-bus repeater Min Max Unit ...

Page 9

... 3 SDA, SCL 0 3 Rev. 02 — 5 May 2008 PCA9517A Level translating I Min Typ 2.7 - [1] 0 1.5 - 1.5 - 1.5 0.7V - CC(B) [2] 0.5 - 0.5 0 0.47 0.52 ...

Page 10

... Figure 11 port B; Figure 11 EN HIGH before START condition EN HIGH after STOP condition on port B. CC( unless otherwise noted. CC(A) amb = 2 amb CC(A) Rev. 02 — 5 May 2008 PCA9517A Level translating I Min Typ 0.5 - 0.7V - CC( for the second and subsequent LOW levels seen by the ...

Page 11

... CC(A) t PLH PULSE GENERATOR R = load resistor; 1. port B; 167 L to 5.5 V load capacitance includes jig and probe capacitance termination resistance should be equal Rev. 02 — 5 May 2008 PCA9517A Level translating I input 0.3V 0.3V CC( PHL PLH 80 % 1.5 V 1.5 V output THL ...

Page 12

... 2.5 scale (1) ( 0.49 0.25 5.0 4.0 1.27 0.36 0.19 4.8 3.8 0.019 0.0100 0.20 0.16 0.244 0.05 0.014 0.0075 0.19 0.15 0.228 REFERENCES JEDEC JEITA MS-012 Rev. 02 — 5 May 2008 PCA9517A Level translating 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 ...

Page 13

... Product data sheet 2.5 scale (1) ( 0.45 0.28 3.1 3.1 0.65 0.25 0.15 2.9 2.9 REFERENCES JEDEC JEITA Rev. 02 — 5 May 2008 PCA9517A Level translating detail 5.1 0.7 0.94 0.1 0.1 0.1 4.7 0.4 EUROPEAN PROJECTION 2 C-bus repeater SOT505-1 A ...

Page 14

... Solder bath specifications, including temperature and impurities PCA9517A_2 Product data sheet Level translating I Rev. 02 — 5 May 2008 PCA9517A 2 C-bus repeater © NXP B.V. 2008. All rights reserved ...

Page 15

... Lead-free process (from J-STD-020C) Package reflow temperature ( C) 3 Volume (mm ) < 350 260 260 250 Figure 16. Rev. 02 — 5 May 2008 PCA9517A 2 Level translating I C-bus repeater Figure 16) than a SnPb process, thus 350 220 220 350 to 2000 > 2000 260 260 250 245 ...

Page 16

... Charged-Device Model Complementary Metal-Oxide Silicon ElectroStatic Discharge Human Body Model Inter Integrated Circuit bus Machine Model Resistor-Capacitor network System Management Bus Rev. 02 — 5 May 2008 PCA9517A 2 Level translating I C-bus repeater peak temperature time 001aac844 © NXP B.V. 2008. All rights reserved ...

Page 17

... PCA9517A_2 20080505 • Modifications: Table 1 “PCA9517 and PCA9517A – changed HBM for PCA9517A from “> 6.5 kV” to “>5.5 kV” – changed MM for PCA9517A from “> 550 V” to “> 450 V” – Table note [1] – added • Section 2 – changed from “6500 V HBM” to “5500 V HBM” ...

Page 18

... 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 — 5 May 2008 PCA9517A 2 Level translating I C-bus repeater © NXP B.V. 2008. All rights reserved ...

Page 19

... 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. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com PCA9517A 2 C-bus repeater All rights reserved. Date of release: 5 May 2008 Document identifier: PCA9517A_2 ...

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