TC7WPB8306L8X,TC7WPB8307L8X CMOS Digital Integrated Circuits Silicon Monolithic TC7WPB8306L8X,TC7WPB8307L8XTC7WPB8306L8X,TC7WPB8307L8XTC7WPB8306L8X,TC7WPB8307L8XTC7WPB8306L8X,TC7WPB8307L8X 1. 1. 1. 1. Functional DescriptionFunctional DescriptionFunctional DescriptionFunctional Description Low-Voltage, Low-Power 2-Bit Dual-Supply Bus Switch 2. 2. GeneralGeneral 2. 2. GeneralGeneral The TC7WPB8306L8X and TC7WPB8307L8X are CMOS 2-bit dual-supply bus switches that can provide an interface between two nodes at different voltage levels. These devices can be connected to two independent power supplies. V supports 1.8-V, 2.5-V and 3.3-V power supplies, whereas V supports 2.5-V, 3.3-V and 5.0 V CCA CCB power supplies. Each An terminal has an internal pull-up resistor to V , and each Bn terminal has an internal pull-up resistor CCA to V . And each I/O terminal has a signal level detection circuit which speeds up the low-to-high transition. CCB The Output Enable (OE: TC7WPB8307L8X, OE: TC7WPB8306L8X) input is common for all the two-bits of the data lines thus these device are used as a single two-bits bus switch. For the TC7WPB8306L8X, Output Enable (OE) is active-High: When OE is High, the switch is on when Low, the switch is off. For the TC7WPB8307L8X, Output Enable (OE) is active-Low: When OE is Low, the switch is on when High, the switch is off. All inputs and outputs of the TC7WPB8306L8X and TC7WPB8307L8X can tolerate overvoltage conditions up to 5.5 V. The channels consist of n-type MOSFETs. All the inputs provide protection against electrostatic discharge. 3. 3. 3. 3. FeaturesFeaturesFeaturesFeatures (1) Operating voltage: 1.8 V to 2.5 V / 1.8 V to 3.3 V / 1.8 V to 5.0 V / 2.5 V to 3.3 V / 2.5 V to 5.0 V / 3.3 V to 5.0 V bidirectional interface (2) Operating voltage: V = 1.65 to 5.0 V, V = 2.3 to 5.5 V CCA CCB (3) R = 6.5 (typ.) ON (ON-resistance test condition: V = 0 V, I = 10 mA, V = 3.0 V, V = 4.5 V) IS IS CCA CCB (4) ESD performance: Machine mode 200 V, Human body model 2000 V (5) 5.5-V tolerant function and power-down protection provided on all inputs and outputs. (6) Packages: MP8 4. 4. PackagingPackaging 4. 4. PackagingPackaging MP8 2013-02-20 1 Rev.1.0TC7WPB8306L8X,TC7WPB8307L8X 5. 5. 5. 5. Pin AssignmentPin AssignmentPin AssignmentPin Assignment TC7WPB8306L8X TC7WPB8307L8X 6. 6. 6. 6. MarkingMarkingMarkingMarking TC7WPB8306L8X TC7WPB8307L8X 7. 7. 7. 7. Block DiagramBlock DiagramBlock DiagramBlock Diagram One-shot driver circuits (RA1, RB1, RA2 and RB2) of the TC7WPB8306L8X and TC7WPB8307L8X detect either a rising or falling edge on the A or B port. During the rise time, the RA1 and RB1 transistors are turned on for a certain period to speed up a transition from Low to High. Likewise, during the fall time, the RA2 and RB2 transistors are turned on to speed up a transition from High to Low. TC7WPB8306L8X TC7WPB8307L8X 8. 8. 8. 8. Principle of OperationPrinciple of OperationPrinciple of OperationPrinciple of Operation 8.1. Truth Table 8.1. 8.1. 8.1. Truth TableTruth TableTruth Table Inputs OE Inputs OE Function (TC7WPB8306L8X) (TC7WPB8307L8X) H L A port = B port L H Disconnect 2013-02-20 2 Rev.1.0