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PCA9701; PCA9702
General description
The PCA9701/PCA9702 are low power 18 V tolerant SPI General Purpose Input (GPI) shift register designed to monitor the status of switch inputs. It generates an interrupt when one or more of the switch inputs change state. The input level is recognized as a HIGH when it is greater than 0.7 x VDD and as a LOW when it is less than 0.4 x VDD. The PCA9701 can monitor up to 16 switch inputs and the PCA9702 can monitor up to 8 switch inputs.
The falling edge of the CS pin samples the input port status and clears the interrupt. When CS is LOW, the rising edge of the SCLK loads the shift register and shifts the value out of the shift register. The serial input is sampled on the falling edge of SCLK.
Each of the input ports has a 18 V breakdown ESD protection circuit. When used with a series resistor (minimum 100 kOhm), the input can connect to a 12 V battery and support double battery, reverse battery, and load dump conditions in automotive applications. Higher voltages can be tolerated on the inputs depending on the series resistor used to limit the input current.
With both the high breakdown voltage and high ESD, these devices are useful for both automotive and mobile applications.
Features
- 16 general purpose input ports (PCA9701) or 8 general purpose input ports (PCA9702)
- 18 V tolerant input ports with 100 kOhm external series resistor
- Open-drain interrupt output
- Interrupt enable pin (INT_EN) disables interrupt output
- VDD range: 2.5 V to 5.5 V
- IDD is very low 2.5 uA maximum
- SPI serial interface with speeds up to 5 MHz
- AEC-Q100 qualification available
- ESD protection exceeds 8 kV HBM per JESD22-A114 (INT_EN is 7.5 kV), 600 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
- Operating temperature range: -40 Cel to +125 Cel
- PCA9701 offered in SO24, TSSOP24 and HWQFN24 packages
- PCA9702 offered in TSSOP16 package
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| PCA9701D | PCA9701D | 9352 836 17112 | Volume production | SOT137-1
(SO24) | Tube | Standard Marking | PCA9701D
| |
| PCA9701D | PCA9701D-T | 9352 836 17118 | Volume production | SOT137-1
(SO24) | Reel Pack, SMD, 13" | Standard Marking | PCA9701D
| |
| PCA9701HF | 9352 851 88118 | Development | SOT994 | Reel Pack, SMD, 13" | Standard Marking | Not available
| ||
| PCA9701PW | PCA9701PW | 9352 836 19112 | Volume production | SOT355-1
(TSSOP24) | Tube | Standard Marking | PCA9701PW
| |
| PCA9701PW | PCA9701PW-T | 9352 836 19118 | Volume production | SOT355-1
(TSSOP24) | Reel Pack, SMD, 13" | Standard Marking | PCA9701PW
| |
| PCA9702PW | 9352 836 21112 | Development | SOT403-1
(TSSOP16) | Tube | Standard Marking | Not available
| ||
| PCA9702PW | 9352 836 21118 | Development | SOT403-1
(TSSOP16) | Reel Pack, SMD, 13" | Standard Marking | Not available
|
Products in the above table are all in production. Some variants are discontinued; click here for information on these variants.
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| PCA9701D | 9352 836 17112 | not available | ||||||
| PCA9701D | 9352 836 17118 | NA | DIGI-KEY CORPORATION | 2,000 | 6/29/2008 | Buy online | Order samples | |
| PCA9701HF | 9352 851 88118 | not available | ||||||
| PCA9701PW | 9352 836 19112 | not available | ||||||
| PCA9701PW | 9352 836 19118 | NA | DIGI-KEY CORPORATION | 5,000 | 6/29/2008 | Buy online | Order samples | |
| PCA9702PW | 9352 836 21112 | not available | ||||||
| PCA9702PW | 9352 836 21118 | not available |
Applications
- Switch monitoring
- Industrial equipment
- Cellular telephones
- Emergency lighting
Related applications
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LCD display - discretes focus
PDA - discretes focus
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Intelligent washing machine
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Nexperia UMA-enabled GSM/GPRS/EDGE VAS system solution (6100)
Cellular phone - MMS functionality
LCD TV - MMS functionality
Set-top box - 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)
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