The MAX4357 is a highly integrated 32×16 video crosspoint switch matrix with input and output buffers. This device operates from dual ±3V to ±5V supplies or from a single +5V supply. Digital logic is supplied from an independent single +2.7V to +5.5V supply. All inputs and outputs are buffered, with all outputs able to drive standard 75Ω reverse-terminated video loads. The switch matrix configuration and output buffer gain are programmed through an SPI™/QSPI™-compatible, 3-wire serial interface and initialized with a single update signal. The unique serial interface operates in two modes facilitating both fast updates and initializa- tion. On power-up, all outputs are initialized in the dis- abled state to avoid output conflicts in large-array configurations. Superior flexibility, high integration, and space-saving packaging make this nonblocking switch matrix ideal for routing video signals in security and video-on- demand systems. The MAX4357 is available in a 128-pin TQFP package and specified over an extended -40°C to +85°C tem- perature range. Applications Security Systems Video Routing Video-On-Demand Systems Features o 32×16 Nonblocking Matrix with Buffered Inputs and Outputs o Operates from ±3V, ±5V, or +5V Supplies o Each Output Individually Addressable o Individually Programmable Output Buffer Gain (AV = +1V/V or +2V/V) o High-Impedance Output Disable for Wired-OR Connections o 0.1dB Gain Flatness to 12MHz o Minimum -62dB Crosstalk, -110dB Is
The MAX4357 is a highly integrated 32 × 16 video crosspoint switch matrix with buffered inputs and outputs. It operates from dual +3 V to +5 V supplies or a single +5 V supply, and its output buffer gain can be programmed via a SPI/QSPI‑compatible 3‑wire interface.
The device is intended for security, video routing and video‑on‑demand systems. It is supplied in a 128‑pin TQFP package and is rated for an extended temperature range of –40 °C to +85 °C. Ordering information and detailed electrical specifications are provided throughout the document.
| Supply voltage range (dual) | +3 V to +5 V |
|---|---|
| Output buffer gain | +1 V/V or +2 V/V |
| Crosstalk (minimum) | -62 dB at 6 MHz |
| Isolation (minimum) | -110 dB at 6 MHz |
| Power consumption | 220 mW (0.43 mW per point) |
| Package | 128‑pin TQFP |
| Operating temperature range | -40 °C to +85 °C |
The MAX4357 is available in a 128‑pin TQFP package.
It operates from –40 °C to +85 °C.
It provides a 32 × 16 matrix of video inputs and outputs.
The device achieves a minimum of –62 dB crosstalk at 6 MHz.