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PCA9517

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Datasheet

PCA9517
(Product Specification)
30-Jan-07, 19 pages, 120 kB

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PCA9517 - Level translating I2C-bus repeater

General description
Features
Products/packages
Quality/reliability/chemical content
Pricing/ordering/availability
Samples
Discontinued information
Applications
Block diagrams/pinning
Design support
Parametrics/similar products
Print/email
Disclaimers
Devices listed on this page should not be used for new designs! Recommended replacement: PCA9517A_1All information hereunder is subject to the subsequent disclaimers

General description

The PCA9517 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) 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) lines, thus enabling two buses of 400 pF. Using the PCA9517 enables the system designer to isolate two halves of a bus for both voltage and capacitance. The SDA and SCL pins are over voltage tolerant and are high-impedance when the PCA9517 is unpowered.

The 2.7 V to 5.5 V bus B-side drivers behave much like the drivers on the PCA9515A device, while the adjustable voltage bus A-side drivers drive more current and eliminate the static offset voltage. This results in a LOW on the B-side translating into a nearly 0 V LOW on the A-side which accommodates smaller voltage swings of lower voltage logic.

The static offset design of the B-side PCA9517 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, PCA9517 (B-side), or PCA9518. The A-side of two or more PCA9517s can be connected together, however, to allow a star topography with the A-side on the common bus, and the A-side can be connected directly to any other buffer with static or dynamic offset voltage. Multiple PCA9517s can be connected in series, A-side to B-side, with no build-up in offset voltage with only time of flight delays to consider.

The PCA9517 drivers are not enabled unless VCCA is above 0.8 V and VCC is above 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 B-side 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 B-side 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 A-side drives a hard LOW and the input level is set at 0.3VCCA to accommodate the need for a lower LOW level in systems where the low voltage side supply voltage is as low as 0.9 V.

Features

  • 2 channel, bidirectional buffer isolates capacitance and allows 400 pF on either side of the device
  • Voltage level translation from 0.9 V to 5.5 V and from 2.7 V to 5.5 V
  • Footprint and functional replacement for PCA9515/15A
  • 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
  • A-side operating supply voltage range of 0.9 V to 5.5 V
  • B-side 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).
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
  • Packages offered: SO8 and TSSOP8

Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
PCA9517DPCA9517D,1129352 767 64112Volume productionSOT96TubeStandard Marking
PCA9517DPCA9517D,1189352 767 64118Volume productionSOT96Reel Pack, SMD, 13"Standard Marking
PCA9517DPPCA9517DP,1189352 767 65118Volume productionSOT505Reel Pack, SMD, 13"Standard Marking

Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
PCA9517DPCA9517D,112PCA9517D
week 13, 2005
PCA9517DPCA9517D,118PCA9517D
week 13, 2005
PCA9517DPPCA9517DP,118Not available
week 13, 2005

Quality and reliability disclaimer

Pricing/ordering/availability

Type numberOrdering code(12NC)Orderable part numberIndicative price/unit($)RegionDistributorIn stockOrder quantityInventory dateBuy online
PCA9517D9352 767 64112  PCA9517D,112  1.1100NAARROW ELECTRONICS1,521 11/6/2009Buy online
    NAAVNET ELECTRONICS MARKETING759 11/7/2009Buy online
PCA9517D9352 767 64118  PCA9517D,118  1.1100NAARROW ELECTRONICS2,500 11/6/2009Buy online
    NADIGI-KEY CORPORATION4,954 11/7/2009Buy online
    NAMOUSER ELECTRONICS735 11/7/2009Buy online
    NAFUTURE ELECTRONICS2,500 11/7/2009Buy online
PCA9517DP9352 767 65118  PCA9517DP,118  1.1100ASIASAC - Taiwanyes250011/08/2009Buy online
    NADIGI-KEY CORPORATION6,033 11/7/2009Buy online
    NAMOUSER ELECTRONICS747 11/7/2009Buy online
    NAFUTURE ELECTRONICS32,500 11/7/2009Buy online
    NAAVNET ELECTRONICS MARKETING659 11/7/2009Buy online

Block diagrams/pinning

Parametrics/similar products

Type numberPackageEnableOperating
temp.(Cel)
I²C-bus(kHz)Operating voltage(VDC)Operating Voltage Range 2(V)InputsOutputs
PCA9517DSOT96
yes-40~854002.7~3.60.9~5.511
PCA9517DPSOT505
yes-40~854002.7~3.60.9~5.511


Similar products
PCA9517 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.