TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
Low-Voltage 16-Bit Registered Transceiver with Bushold
The TC74VCXH16543FT is a high-performance CMOS 16-bit
registered transceiver. Designed for use in 1.8-V, 2.5-V or 3.3-V
systems, it achieves high-speed operation while maintaining the
CMOS low power dissipation.
The TC74VCXH16543FT can be used as two 8-bit transceivers
or one 16-bit transceiver. Separate latch-enable (LEAB or LEBA)
and output-enable (OEAB or OEBA) inputs are provided for each
register to permit independent control in either direction of data
The A-to-B enable (CEAB) input must be low in order to enter
data from A or to output data from B. If CEAB is low and LEAB
Weight: 0.25 g (typ.)
is low, the A-to-B latches are transparent; a subsequent
low-to-high transition of LEAB puts the Alatches in the storage mode. With CEAB and OEAB both low, the 3-state
B outputs are active and reflect the data present at the output of the A latches.
Data flow from B to A is similar but requires using the CEBA, LEBA, and OEAB inputs.
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.
The A, B data inputs include active bushold circuitry, eliminating the need for external pull-up resistors to hold
unused or floating data inputs at a valid logic level.
All inputs are equipped with protection circuits against static discharge.
• Low-voltage operation: VCC = 1.8 to 3.6 V
• Bushold on data inputs eliminating the need for external pull-up/pull-down resistors
• High-speed operation: tpd = 3.5 ns (max) (VCC = 3.0 to 3.6 V)
: tpd = 4.0 ns (max) (VCC = 2.3 to 2.7 V)
: tpd = 8.0 ns (max) (VCC = 1.8 V)
• 3.6-V tolerant control inputs
• Output current: IOH/IOL = ±24 mA (min) (VCC = 3.0 V)
: IOH/IOL = ±18 mA (min) (VCC = 2.3 V)
: IOH/IOL = ±6 mA (min) (VCC = 1.8 V)
• Latch-up performance: −300 mA
• ESD performance: Machine model ≥ ±200 V
Human body model ≥ ±2000 V
• Package: TSSOP
Note: Do not apply a signal to any bus pins when it is in the output mode. Damage may result.
Start of commercial production