PCA9504A device highlight

Key Features: Single-Chip Solution for Motherboard Support Functions Reduces Board Space and Parts Count Cost-Efficient Process and Package Market Pricing Volume Production

The PCA9504A Glue Chip 4 is a highly-integrated and cost-efficient custom ASIC that reduces logic part count, overall component cost, and board space requirements for PC designers and manufacturers. The Glue Chip 4 supports the latest generation of high-volume platforms based on Intel^® processors and chipsets that require additional external circuitry in order to function properly. It is used on entry servers/workstations (840 and 860 chipsets), high-end desktops (820 and 850 chipsets), as well as mid-range (815, 830, and 845 chipsets) and low-end (810 chipset) motherboards. Some of these functionalities include meeting timing specifications, buffering signals, and switching between power wells.

The PCA9504A Glue Chip 4 integrates miscellaneous motherboard logic and analog functions into a single, small footprint 56-pin TSSOP device. The Glue Chip 4 typically resides on the motherboard close to the I/O controller Hub (ICH) and supports ICH3 and ICH4.

• Dual Strapping, Selectable Feature Sets
• Audio-Disable Circuit
• Mute Audio Circuit
• 5V Reference Generation
• 5V Standby Reference Generation
• HD Single Color LED Driver
• IDE Reset Signal Generation/PCIRST# Buffers
• PWROK (PWRGD_3V) Signal Generation
• Power Sequencing / BACKFEED_CUT
• Power Supply Turn-On Circuitry
• RMSRST# Generation
• Voltage Translation for DDC-to-VGA Monitor
• HSYNCH/VSYNCH Voltage Translation to VGA Monitor
• Tri-State Buffers for Test
• Extra GP Logic Gates
• Power LED Drivers
• Flash FLUSH# / INIT# circuit
• 5V I2C-to-3.3V SMBus Conversion

• Requires Both 3.3V and 5.0V Operating Voltages
• -40 to +85 ^oC Operating Temperature Range
• Offered in 56-Pin TSSOP (DGG Package Designator)
• Manufactured in High-Volume CMOS Process

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	PCA9504A		Glue Chip 4 for Pentium IV Motherboards