100Mbps, 16-Channel LLTs

 

Part Number	Replacement	Explanation

Description

Create a design and simulate using EE-Sim^® tools:

The MAX14548E/MAX14548AE 16-channel, bidirectional level translators (LLTs) provide the level shifting necessary for 100Mbps data transfer in multivoltage systems. Externally applied voltages, V_CC and V_L, set the logic levels on either side of the device. Logic signals present on the V_L side of the device appear as a high-voltage logic signal on the V_CC side of the device and vice versa.

The devices feature a programming frequency input (PF) that adjusts the one-shot accelerator on-time to guarantee a bit rate of 100Mbps with a load capacitance < 15pF and V_L > 1.1V (MAX14548E) or V_L > 1.4V (MAX14548AE) when driven low. The MAX14548E can drive capacitive loads up to 50pF with a guaranteed bit rate of 40Mbps when V_L ≥ 1.1V and PF is driven high. The MAX14548AE can drive capacitive loads up to 50pF with a guaranteed bit rate of 40Mbps when V_L ≥ 1.1V and PF is driven high.

The device operate at full speed with external drivers that source as low as 4mA output current. Each I/O channel is pulled up to V_CC or V_L by an internal 35µA current source, allowing both devices to be driven by either push-pull or open-drain drivers.

The devices feature multiple power-saving features including an enable input (EN) that places the device into a low-power shutdown mode when driven low and an automatic shutdown mode that disables the part when V_CC is less than V_L. The MAX14548AE output driver is designed to operate at full speed (100Mbps) with V_L > 1.4V, which reduces the dynamic supply current vs. the MAX14548E. The state of I/O V_{CC_} and I/O V_{L_} are in high-impedance state during shutdown.

The devices operate with V_CC voltages from +1.7V to +3.6V and V_L voltages from +1.1V to +3.6V, making them ideal for data transfer between low-voltage ASICs/PLDs and higher voltage systems. The devices are available in a 40-bump WLP (2.16mm x 3.46mm) package with 0.4mm ball pitch, and operate over the extended -40°C to +85°C temperature range.

MAX14548AE, MAX14548E: Typical Operating Circuit Enlarge+

Key Features

• Bidirectional Level Translation
• 100Mbps Guaranteed Data Rate
• +1.7V to +3.6V Supply Voltage Range for V_CC
• +1.1V to +3.6V Supply Voltage Range for V_L (V_CC > V_L)
• -40°C to +85°C Extended Operating Temperature Range

Applications/Uses

• Cell Phones
• CMOS Logic-Level Translation
• GPS
• Low-Voltage ASIC Level Translation
• Portable Communication Devices
• Smart Card Readers
• Telecommunications Equipment