产品概述
描述
The ST16C32245 is a dual supply low voltage CMOS 14-bit bus transceiver fabricated with sub-micron silicon gate and five-layer metal wiring C2MOS technology. Designed for use as an interface between a 3.3 V bus and a 2.5 V or 1.8 V bus in a mixed 3.3 V/1.8 V,3.3 V/2.5 V and 2.5 V/1.8 V supply systems, it achieves high speed operation while maintaining the CMOS low power dissipation. It also includes 2-bit I2C level translation.
This IC is intended for two-way asynchronous communication between data buses and the direction of data transmission is determined by nDIR inputs. The enable inputs nG can be used to disable the device so that the buses are effectively isolated. The A-port interfaces with the 3 V bus, the B-port with the 2.5 V and 1.8 V bus.
All inputs are equipped with protection circuits against static discharge, giving them 2 kV ESD immunity and transient excess voltage. All floating bus terminals during high Z state do not need an external pull-up or pull-down resistor.
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所有功能
- High speed: tPD = 4.4 ns (max) at TA = 85 °C VCCA = 3.0 V and VCCB = 2.3 V
- Low power dissipation:ICCA = ICCB = 20 μA (max) at TA = 85 °C
- Symmetrical output impedance:|IOHA| = IOLA= 8 mA min(VCCA = 3.0 V; VCCB = 1.65 V or 2.3 V)|IOHB| = IOLB= 6 mA min(VCCB = 1.65 V VCCA = 3.0 V; )
- Balanced propagation delays: tPLH≅ tPHL
- Power down protection on inputs and outputs
- 26 Ω series resistor on A side outputs
- Operating voltage range:VCCA(opr) = 2.3 V to 3.6 V VCCB (opr) = 1.65 V to 2.7 V
- Fast I2C lines 1.8 V/2.8 V level translator: 400 kHz guaranteed data rate at CL = 15 pF
- Bus hold provided on data input both side
- Latch-up performance exceeds 500 mA (JESD 17)
- ESD performance: HBM > 2000 V (MIL STD 883 method 3015); MM > 200 V
