TC74VCX16843FT

The TC74VCX16843FT is a high performance CMOS 18-bit D-TYPE LATCH. Designed for use in 1.8, 2.5 or 3.3 Volt systems, it achieves high speed operation while maintaining the CMOS low power dissipation. It is also designed with over voltage tolerant inputs and outputs up to 3.6 V. The TC74VCX16843FT can be used as two 9-bit latches or one 18-bit latch. The 18 latches are transparent D-type latches. The device has data inputs and provides true data at its outputs. While the latch-enable (1LE or ZLE) input is high, the Q outputs of the corresponding 9-bit latch follow the inputs. When LE is taken low. the outputs are latched at the levels set up at the inputs. and are independent of the LE and are accomplished by setting the appropriate input low. When the OE input is high, the outputs are in a high impedance state. This device is designed to be used with 3-state memory address drivers, etc. All inputs are equipped with protection circuits against static discharge. /FONT>

The features of TC74VCX16843FT can be summarized as (1)low voltage operation: VCC = 1.8~3.6V; (2)high speed operation: tpd = 3.0ns (max.) at VCC = 3.0~3.6V/tpd = 3.7ns(max.) at VCC = 2.3V~2.7V/tpd =7.4ns (max.) at VCC = 1.8V; (3)3.6 tolerant inputs and output; (4)output current: (IOH/IOL) = ±24mA (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: ±300mA; (6)ESD performance: human body model >±2000V/machine model>±200V; (7)package: TSSOP (Thin shrink small outline package); (8)power down protection is provided on all inputs and outputs; (9)support live insertion/withdrawal (To ensure the high-impedance state during power up or power own, OE shoud be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.).

The absolute maximum ratings of TC74VCX16843FT are (1)VCC power supply voltage: -0.5~4.6V; (2)VIN DC input voltage: -0.5~4.6V; (3)VOUT DC output voltage(VCC = off-state/high or low state, IOUT absolute maximum rating must be observed): -0.5~4.6V/-0.5~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: ±100mA; (9)Tstg storage temperature: -65~150°C.