1 General description

The 74ALVCH162827 20-bit buffers provide high performance bus interface buffering

for wide data/address paths or buses carrying parity. They have NAND output enables

(nOE1 and nOE2) for maximum control flexibility.

The 74ALVCH162827 is designed with 30 Ω series resisters in both the pull-up and pulldown

output structures. This design reduces line noise in applications such as memory

address drivers, clock drivers and bus receivers/transmitters.

To ensure the high impedance state during power up or power down, nOEn should be

tied to VCC through a pullup resistor; the minimum value of the resistor is determined by

the current-sinking/current-sourcing capability of the driver.

The 74ALVCH162827 has active bus hold circuitry which is provided to hold unused or

floating data inputs at a valid logic level. This feature eliminates the need for external

pull-up or pull-down resistors.

2 Features and benefits

? CMOS low power consumption

? MultiByte flow-through standard pin-out architecture

? Low inductance multiple VCC and GND pins for minimum noise and ground bounce

? Direct interface with TTL levels (2.7 V to 3.6 V)

? Bus hold on data inputs

? Current drive ± 12 mA at 3.0 V

? Integrated 30 Ω termination resistors

? Complies with JEDEC standards:

– JESD8-5 (2.3 V to 2.7 V)

– JESD8B/JESD36 (2.7 V to 3.6 V)

? ESD protection:

– HBM ANSI/ESDA/JEDEC JS-001 exceeds 2000 V

– CDM JESD22-C101E exceeds 1000 V