TC74VCX16500FT

The TC74VCX16500FT is a high- performance CMOS 18-bit universal bus transceiver which is designed for use in 1.8V, 2.5V or 3.3V systems, it achieves high-speed operation while maintaining the CMOS low power dissipation. Data flow in each direction is controlled by output-enable (OEAB and OEBA), latch-enable (LEAB and LEBA), and clock (CKAB and CKBA) inputs. For A-to-B data flow, the device operates in the transparent mode when LEAB is high. Data flow for B to A is similar to that of A to B but uses OEBA, LEBA, and CKBA. When the OE input is high, the outputs are in a high-impedance state. When LEAB is low, the A data is latched if CKAB is held at a high or low logic level. If LEAB is low, the A bus data is stored in the latch/flip-flop on the high-to-low transition of CKAB. This device is designed to be used with 3-state memory address drivers, etc. All inputs of the TC74VCX16500FT are equipped with protection circuits against static discharge. It is also designed with over voltage tolerant inputs and outputs up to 3.6V.

The features of TC74VCX16500FT can be summarized as (1)low voltage operation: VCC = 1.8 to 3.6V; (2)high-speed operation: tpd = 2.9 ns (max) at VCC = 3.0 to 3.6V/tpd = 3.5 ns (max) at VCC = 2.3 to 2.7V/tpd = 7.0 ns (max) at VCC = 1.8V; (3)3.6V tolerant inputs and outputs; (4)output current: (IOH/IOL) = ±24 mA (min) at VCC = 3.0V/(IOH/IOL) = ±18mA(min) at VCC = 2.3V/(IOH/IOL) = ±6mA (min) at VCC =1.8V; (5)latch-up performance: ±300 mA; (6)ESD performance: human body model > ±2000V/machine model > ±200V; (7)package: TSSOP (Thin shrink small outline package); (8)bidirectional interface between 2.5V and 3.3V signals; (9)power down protection is provided on all inputs and outputs; (10)supports live insertion/withdrawal (Note 3) (Note 1: Do not apply a signal to any bus terminal when it is in the output mode. Damage may result. Note 2: All floating (high impedance) bus terminal must have their input level fixed by means of pull up or pull down resistors. Note 3: To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-souring capability of the driver.).

The absolute maximum ratings of TC74VCX16500FT are (1)VCC power supply voltage: -0.5 to 4.6V; (2)VIN DC input voltage(OEAB, OEBA, LEAB, LEBA, CKAB, CKBA): -0.5 to 4.6V; (3)VI/O DC bus I/O voltage(VCC = off-state/high or low state, IOUT absolute maximum rating must be observed): -0.5 to 4.6/-0.5 to VCC + 0.5V; (4)IIK input diode current: -50mA; (5)IOK output diode current(VOUT < GND, VOUT > VCC): ±50mA; (6)IOUT DC output current: ±50mA; (7)PD power dissipation: 400mW; (8)ICC/IGND DC VCC/Ground Current per supply pin: ±100mA; (9)Tstg storage temperature: -65 to 150°C.