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Highlights
Upstream HSIC port and 2 exposed Hi-Speed USB 2.0
downstream ports for external peripheral expansion
The dedicated flash media reader is internally attached to a
3rd downstream port of the hub as a USB Compound
Device
- a single or multiplexed flash media reader interface
PortMap
- Flexible port mapping and port disable sequencing supports
multiple platform designs
PortSwap
- Programmable USB differential-pair pin locations eases PCB
design by aligning USB signal traces directly to connectors
PHYBoost
- Programmable USB transceiver drive strength recovers signal
integrity
 
Features
Compliance with the following flash media card
specifications SD 2.0 / MMC 4.2 / MS 1.43 / MS-Pro 1.02 /
MS-Pro-HG 1.01 / MS-Duo 1.10 / xD 1.2
Low-power digital HSIC interface offers a replacement for
onboard host and device connection for analog USB bus
cable
HSIC interface enables printers, mobile PCs, ultra-mobile
PCs, and cell phone products to reduce the total power
budget while taking full advantage of USB connectivity and
compatibility with existing USB drivers and software
External 1.2 V reference allows upstream and downstream
HSIC links to use the same voltage reference
Supports a single external 3.3 V supply source; internal
regulators provide 1.8 V internal core voltage for additional
bill of materials and power savings
The transaction translator (TT) in the hub supports operation
of Full-Speed and Low-Speed peripherals
9 K RAM | 64 K on-chip ROM
Enhanced EMI rejection and ESD protection performance
Hub and flash media reader/writer configuration from a
single source: External I2C® ROM or external SPI ROM
- Configures internal code using an external I2C EEPROM
- Supports external code using an SPI Flash EEPROM
- Customizable vendor ID, product ID, and language ID if using
an external EEPROM
Up to 9 configurable GPIOs for special functions
The USB4640 supports the commercial temperature range
of 0°C to +70°C
The USB4640i supports the industrial temperature range of
-40°C to +85°C
48-pin QFN lead-free, RoHS compliant package (7x7 mm)