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PCA9512A
Datasheet
General description
The PCA9512A is a hot swappable I2C-bus and SMBus buffer that allows I/O card insertion into a live backplane without corruption of the data and clock buses and includes two dedicated supply voltage pins to provide level shifting between 3.3 V and 5 V systems while maintaining the best noise margin for each voltage level. Either pin may be powered with supply voltages ranging from 2.7 V to 5.5 V with no constraints on which supply voltage is higher. Control circuitry prevents the backplane from being connected to the card until a stop bit or bus idle occurs on the backplane without bus contention on the card. When the connection is made, the PCA9512A provides bidirectional buffering, keeping the backplane and card capacitances isolated.
The PCA9512A rise time accelerator circuitry allows the use of weaker DC pull-up currents while still meeting rise time requirements. The PCA9512A incorporates a digital input pin that enables and disables the rise time accelerators on all four SDAn and SCLn pins.
During insertion, the PCA9512A SDAn and SCLn pins are precharged to 1 V to minimize the current required to charge the parasitic capacitance of the chip.
The dynamic offset design of the PCA9510A/11A/12A/13A/14A I/O drivers allow them to be connected to another PCA9510A/11A/12A/13A/14A device in series or in parallel and to the A side of the PCA9517. The PCA9510A/11A/12A/13A/14A cannot connect to the static offset I/Os used on the PCA9515/15A/16/16A/18, PCA9517 B side, or P82B96 Sx/y side.
Features
- Bidirectional buffer for SDA and SCL lines increases fanout and prevents SDA and SCL corruption during live board insertion and removal from multi-point backplane systems
- Compatible with I2C-bus Standard mode, I2C-bus Fast mode, and SMBus standards
- Built-in ΔV/Δt rise time accelerators on all SDAn and SCLn pins (0.6 V threshold) with ability to disable ΔV/Δt rise time accelerator through the ACC pin for lightly loaded systems
- 5 V to 3.3 V level translation with optimum noise margin
- High-impedance SDAn and SCLn pins for VCC or VCC2 =0 V
- 1 V precharge on all SDAn and SCLn pins
- Supports clock stretching and multiple master arbitration and synchronization
- Operating power supply voltage range: 2.7 V to 5.5 V
- I/Os are not 5.5 V tolerant
- 0 Hz to 400 kHz clock frequency
- ESD protection exceeds 2000 V HBM per JESD22-A114, 200 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, TSSOP8 (MSOP8)
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| PCA9512AD | PCA9512AD | 9352 797 21112 | Volume production | SOT96-1
(SO8) | Tube | Standard Marking | PCA9512AD
| Always Pb-free |
| PCA9512AD | PCA9512AD-T | 9352 797 21118 | Volume production | SOT96-1
(SO8) | Tape reel smd | Standard Marking | PCA9512AD
| Always Pb-free |
| PCA9512ADP | PCA9512ADP-T | 9352 797 19118 | Volume production | SOT505-1
(TSSOP8) | Reel Pack, SMD, 13" | Standard Marking | PCA9512ADP
| Always Pb-free |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| PCA9512AD | 9352 797 21112 | 1.3000 | NA | ARROW ELECTRONICS | 397 | 9/2/2008 | Buy online | not available |
| NA | AVNET ELECTRONICS MARKETING | 2,135 | 9/2/2008 | Buy online | ||||
| NA | DIGI-KEY CORPORATION | 3,034 | 9/3/2008 | Buy online | ||||
| NA | FUTURE ELECTRONICS | 1,020 | 9/2/2008 | Buy online | ||||
| NA | MOUSER ELECTRONICS | 3,904 | 9/3/2008 | Buy online | ||||
| PCA9512AD | 9352 797 21118 | 1.3000 | NA | ARROW ELECTRONICS | 5,000 | 9/2/2008 | Buy online | Order samples |
| NA | FUTURE ELECTRONICS | 1,500 | 9/2/2008 | Buy online | ||||
| PCA9512ADP | 9352 797 19118 | 1.3000 | ASIA | WPI | 17,500 | 09/03/2008 | Buy online | Order samples |
| NA | ARROW ELECTRONICS | 15,000 | 9/2/2008 | Buy online | ||||
| NA | DIGI-KEY CORPORATION | 7,500 | 9/3/2008 | Buy online | ||||
| NA | DIGI-KEY CORPORATION | 217 | 9/3/2008 | Buy online | ||||
| NA | MOUSER ELECTRONICS | 1,242 | 9/3/2008 | Buy online |
Applications
- cPCI, VME, AdvancedTCA cards and other multi-point backplane cards that are required to be inserted or removed from an operating system
Related applications
LCD display - discretes focus
PDA - discretes focus
Motherboard components
50-60 Hz CRT integrated DTV (TV210D)
Mid-range integrated DTV (TV810)
Intelligent washing machine
Transceiver board
Power amplifier board
Main CPU board
LCD TV - MMS functionality
Technical documents
Application Notes
Support Documents
75011212;
I2C 2002-1A Evaluation Board Kit (01-Mar-03)
UM10204_3;
I2C-bus specification and user manual (26-Jun-07)
75016532;
NXP 2-channel I (2008-07-01)
75016189;
NXP I (2008-06-01)
75016530;
NXP level-shifting and hot-swappable I (2008-07-01)
Parametrics/similar products
| Type number | Package | Operating temp.(Cel) | I²C-bus(kHz) | Operating voltage(VDC) | Operating Voltage Range 2(V) | Inputs | Outputs |
|---|---|---|---|---|---|---|---|
| PCA9512AD | SOT96-1
(SO8) | -40~85 | 400 | 2.7~5.5 | 2.7~5.5 | 1 | 1 |
| PCA9512ADP | SOT505-1
(TSSOP8) | -40~85 | 400 | 2.7~5.5 | 2.7~5.5 | 1 | 1 |
Similar products
PCA9512A 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.
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