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QCA9557-AT4A
QCA9557-AT4A
| Part Number | QCA9557-AT4A |
|---|---|
| Manufacturer | Qualcomm / Qualcomm Atheros |
| Category | Integrated Circuits (ICs) > Embedded – Microprocessors / Wireless SoCs |
| Description | High-Tier 802.11n Wi-Fi Connectivity SoC, MIPS 74Kc Processor Core, 720MHz, Integrated 2×2 MIMO Baseband, BGA-415 Package. |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The QCA9557-AT4A is a highly integrated wireless SoC built on 720MHz MIPS 74Kc core for routers and industrial gateways. It integrates 2.4GHz 802.11n 2×2 MIMO radio supporting up to 450Mbps, with built-in DDR memory controller, PCIe 1.1, Gigabit Ethernet switch and USB 2.0. BGA-415 packaging ensures good heat dissipation for continuous network operation.
Core Advantages
High-Frequency MIPS 74Kc Execution
720MHz MIPS 74Kc RISC core with built-in DSP, handles packet forwarding, firewall and encryption smoothly without delay.
Advanced 2×2 MIMO Wi-Fi Pipeline
2.4GHz 802.11n baseband with STBC and LDPC, expands coverage and eliminates signal dead zones.
Flexible Multi-Lane PCIe Extension Bus
PCIe 1.1 interface supports external 802.11ac radio to realize 2.4G+5G dual-band wireless equipment.
All-In-One Switching Architecture
Integrated Gigabit Ethernet, USB 2.0, SPI, UART and other peripherals, greatly saving PCB layout space.
Key Specifications
| Brand | Qualcomm Atheros Wi-Fi Series |
|---|---|
| RoHS Status | RoHS Compliant / Lead-Free / Green Package |
| EDA/CAD Model | Schematic symbol blocks, 3D CAD step footprints, and DRQFN pad landing arrays are available on request |
| Warranty | 1-Year Standard Quality Warranty |
| Package / Case | BGA-415 (12mm x 12mm) |
| Mounting Type | Surface Mount SMT/SMD automatic placement |
| Surface Marking / Silkscreen | QCA9557-AT4A Marking |
| CPU Core | 32-bit MIPS 74Kc with hardware DSP engine |
| CPU Clock | 720 MHz |
| Wi-Fi Standard | 802.11 b/g/n, 2.4GHz single band |
| MIMO Configuration | 2×2 spatial streams, max 450Mbps @40MHz channel |
| Memory Support | 16-bit DDR1 / DDR2, up to 400MHz clock; Common matched capacity: 64MB~128MB |
| Storage Interface | SPI NOR Flash, NAND Flash, SDIO |
| On-chip Peripherals | 1×PCIe 1.1, 1×USB2.0 Host, 5-port Gigabit Ethernet Switch, I2S, SPI Flash, JTAG, UART |
| Operating Temperature | 0℃ ~ +85℃ Commercial Grade |
| Chip Supply Voltage | 3.3V I/O, 1.0V Core Voltage |
| Router Input Voltage Range | 5V~8.5V (Requires external LDO step-down) |
| VLAN Support | Built-in hardware VLAN division function |
Typical Applications
- Enterprise wireless access points & business core routers
- Dual-band home gateways, Wi-Fi mesh routers & broadband devices
- Industrial IoT edge gateways & automation data transmission terminals
- Smart building media distribution, IP camera aggregation equipment
- Outdoor hotspot routers, smart city wireless communication modules
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Processing Time | Ship within 1-2 working days |
| Global Delivery Time | 3-7 working days |
| Shipping Carriers | DHL, UPS, FedEx, EMS |
| Payment Options | T/T Bank Transfer, PayPal, Credit Card, Western Union |
Technical Support
Submit inquiry form for datasheets, samples, bulk price and stock checking. We reply within 24 hours.
Frequently Asked Questions
Q1: What does suffix -AT4A mean for QCA9557?
A: -AT4A stands for 720MHz rated frequency and standard lead-free green packaging for mass SMT production.
Q2: Can QCA9557-AT4A work dual-band 2.4G+5G Wi-Fi?
A: Built-in radio only supports 2.4GHz. Connect external 802.11ac chip via PCIe to realize dual concurrent band.
Q3: Does QCA9557 support OpenWrt firmware?
A: Yes, MIPS 74Kc core has complete OpenWrt driver and source code for customized router firmware.
Q4: What are the advantages of BGA-415 package for this chip?
A: BGA-415 has abundant pins to expand peripheral circuits, stable solder joint for long-term operation, good heat conduction for continuous router working.
Q5: What memory capacity can be matched with this chip?
A: Support common DDR2 particles from 64MB to 128MB, SPI Flash from 8MB to 32MB for firmware storage.
Q6: Is this chip suitable for outdoor equipment?
A: It is commercial temperature grade, needs extra heat sink and shell heat dissipation design for long-time outdoor use.
Q7: Why do I see two different CPU clock frequencies for this chip online?
A: The 650MHz rating only applies to early engineering prototype samples. All mass-production QCA9557-AT4A units run at the standard 720MHz clock speed.
Q8: Are your QCA9557-AT4A 100% original factory stock?
A: All chips are original new goods, complete factory packing, can provide material batch report for verification.
Q9: What is the lead time for bulk orders of this model?
A: Small spot orders ship within 1-2 working days; large bulk orders take 7-15 working days according to stock reserve.
Q10: Can you provide full BOM matching service for this WiFi SoC?
A: Yes, we can supply matched DDR, Flash, power IC and peripheral components for one-stop BOM procurement.
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