PCA9306DCTR

PCA9306DCTR is the tape-and-reel SSOP-8 (DCT) ordering code for the Texas Instruments PCA9306 dual bidirectional I2C and SMBus level translator, listed as Active Production in the datasheet package option addendum (SCPS113 Rev O) with device marking 7BD. The two reference rails span 1.2 V to 3.3 V on the VREF1 side and 1.8 V to 5.5 V on the VREF2 side - with the recommended condition that VREF2 sit between VREF1 + 0.6 V and 5.5 V - and the pass-gate on-resistance is 3.5 Ω typical and 5.5 Ω maximum at EN = 4.5 V (4.7 Ω typical, 7 Ω maximum at EN = 3 V; 6.3 Ω typical, 9.5 Ω maximum at EN = 2.3 V), with a propagation delay of 1.5 ns maximum and support for I2C clock rates up to 400 kHz. The selection point is a translator with no direction pin and no edge accelerators: the open-drain pass-gate structure level-shifts both data and clock in either direction, which keeps legacy 5 V peripherals reachable from low-voltage hosts. Selection advice: the on-resistance is part of the I2C pull-up budget on both sides, so check the EN-voltage row of the table against your actual enable rail before fixing pull-up values. Parameters verified against the TI PCA9306 datasheet SCPS113 Rev O (package option addendum and electrical characteristics).