BRF1A Datasheet | Agere Systems

Data Sheet April 2001 Quad Differential Receivers BRF1A, BRF2A, BRS2B, BRR1A, and BRT1A Features s Pin equivalent to the general-trade 26LS32 device, with improved speed, reduced power consumption, and significantly lower levels of EMI High input impedance approximately 8 kΩ Four line receivers per package 400 Mbits/s maximum data rate when used with Agere Systems Inc. data transmission drivers Meets enhanced small device interface (ESDI) standards 4.0 ns maximum propagation delay <0.20 V input sensitivity - 1.2 V to +7.2 V mon-mode range - 40 °C to +125 °C ambient operating temperature range (wider than the 41 Series) Single 5.0 V ± 10% supply Output defaults to logic 1 when inputs are left open- Available in four package types Lower power requirement than the 41 Series The BRF1A device is the generic receiver in this family and requires the user to supply external resistors on the circuit board for impedance matching. The BRF2A is identical to the BRF1A, but has an electrostatic discharge (ESD) protection circuit added to significantly improve the ESD human-body model (HBM) characteristics on the differential input terminals. The BRS2B is identical to the BRF2A, but has a preferred state feature that places the output in the high state when the inputs are open, shorted to ground, or shorted to the power supply. The BRR1A is equivalent to the BRF1A, but has a 110 Ω resistor connected across the differential inputs. This eliminates the need for an external resistor when terminating a 100 Ω impedance line. This device is designed to work with the DP1A or PNPA in point-to-point applications. The BRT1A is equivalent to the BRF1A; however, it is provided with a Y-type resistor network across the differential inputs and terminated to ground. The Y-type termination provides the best EMI results. This device is not remended for applications where the differences in ground voltage between the driver and the receiver exceed 1 V. This device is designed to work with...