Features Key Features • Supports keypad matrices of up to 8 × 12 keys plus 8 special-function (SF) keys for a total of 104 keys. SF keys pull keypad scan inputs directly to ground, rather than connecting to a keypad scan output. • Supports I 2C-compatible ACCESS.bus interface in slave mode up to 400 kHz (Fast-mode). • Three host-programmable PWM outputs useful for smooth LED brightness modulation. • Supports general-purpose I/O expansion on pins not otherwise used for keypad interface. • Key-scan event storage in a FIFO buffer for up to 15 events. • Key events, errors, and dedicated hardware interrupts request host service by asserting the ^IRQ output. • The correct reception of a command may be assumed, if no error is reported from the LM8322 after receiving a command. • Wake-up from Halt mode on any matrix key-scan event, any use of the SF keys, or any activity on the ACCESS.bus interface. Description The LM8322 Mobile I/O Companion is a dedicated device to unburden a host processor from scanning a matrix-addressed keypad. In addition, the LM8322 provides general-purpose I/O expansion, and PWM outputs useful for dynamic LED brightness modulation. It communicates with the host through an I 2C-compatible ACCESS.bus interface. An interrupt output is available for signaling key-press and key-release events. Communication frequencies up to 400 kHz (Fast-mode) bus speed are supported. The LM8322 supports a predefined set of commands. These commands enable a host device to keep control over all functions. Applications • Mobile phones • Personal Digital Assistants (PDAs) • Smart handheld devices • Personal media players

Also Recommended LM8333▲ 2.5 V Operation, Up To 72 Keys, 4 GPIO, LLP Package MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application *click for larger image	Block Diagram *click for larger image

Datasheet

Title		Size	Date	Other Language
	LM8322 Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interface	858 Kbytes	15-May-07

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Design Tools

Title	Size	Date
Evaluation Kit for LM8322 Device

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM8322JGR8	CMOS9T	0	2160	0	0	2397152	2	680198425

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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