ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC CTLR IO LPC MULT PORT 84WFBGA
- Series：-
- Mfr：Microchip Technology
- Package：Tray
- Applications：I/O Controller
- Core Processor：8042 Keyboard Controller
- Program Memory Type：ROM (2kB)
- Controller Series：-
- RAM Size：256 x 8
- Interface：IrDA, LPC, Parallel, Serial, UART
- Number of I/O：23
- Voltage - Supply：-
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Package / Case：84-WFBGA
- Supplier Device Package：84-WFBGA (7x7)
- Grade：-
- Qualification：-
Download product information
Overview
The Microchip Technology SCH3222-SX is a Super I/O controller designed for PC99 and PC2001 compliant systems. It features an LPC interface supporting bus frequencies of 19MHz to 33MHz and operates at 3.3V with a 5V-tolerant SIO block. The device integrates four full-function serial ports (NS16C550A compatible) and two additional 4-pin serial ports, alongside an IrDA 1.0 infrared port and an 8042 software-compatible keyboard/mouse controller. It includes hardware monitoring capabilities such as temperature sensing and fan control, along with power management logic including watchdog timer, reset generation, and programmable clock output.
Feature Summary
- LPC Interface: Supports 19MHz to 33MHz bus frequencies with ISA Plug-and-Play compatibility.
- Serial Ports: Includes four full-function UARTs with 16-byte FIFOs and two additional 4-pin serial ports.
- Keyboard Controller: 8042 software compatible with 2KB program ROM and 256 bytes data RAM.
- Hardware Monitoring: Features internal/external temperature measurement and programmable PWM fan control.
Applications
- Desktop and embedded PC motherboard designs
- Industrial control systems requiring robust I/O interfaces
- Legacy peripheral integration in modern computing platforms
Procurement Notes
Verify the specific suffix 'SX' against the manufacturer's current product identification system to confirm package type and temperature range. Ensure that configuration registers are not accessed if their corresponding pins are not brought out of the package to prevent unpredictable behavior or damage.
Selection Notes
Select the SCH3222-SX when four full-function serial ports and an infrared port are required without parallel port support. Compare GPIO counts (23 total) and package size (84-ball WFBGA) against larger family members like the SCH3227 if pin count is a constraint.
Part Context
The SCH3222 belongs to the SCH322x family, which succeeds the SCH311x series. Unlike the SCH3227 and SCH3226, the SCH3222 does not feature a STRAPOPT pin and is internally hard-wired to identify as the legacy SCH3116 code. It lacks the parallel port and hardware monitor found in other family variants.
Replacement Considerations
The SCH3116 is the direct legacy predecessor identified by the internal Device ID register. Cross-referencing with the SCH3224 may be necessary if hardware monitoring or IDE reset outputs are required, though pinouts differ significantly.
FAQ
Does the SCH3222 support a parallel port?
No, the SCH3222 does not include a parallel port. This feature is available only in the SCH3227 and SCH3224 models within the same family.
What is the maximum operating frequency of the LPC bus?
The LPC interface supports bus frequencies ranging from 19MHz to 33MHz.
How many general-purpose I/O pins are available on the SCH3222?
The SCH3222 provides 23 General Purpose I/O (GPIO) pins.
