HD74HC299 Datasheet, PDF (1/9 Pages) Hitachi Semiconductor – 8-bit Universal Shift/Storage Register (with 3-state outputs)

HD74HC299
8-bit Universal Shift/Storage Register (with 3-state outputs)
REJ03D0609–0200
(Previous ADE-205-488)
Rev.2.00
Jan 31, 2006
Description
The HD74HC299 features multiplexed inputs/outputs to achieve full 8-bit data handling in a single 20-pin package.
Due to the large output drive capability and 3-state feature, this device is ideally suited for interfacing with bus lines in
a bus oriented system. Two function select inputs and two output control inputs are used to choose the mode of
operation as listed in the function table. Synchronous parallel loading is accomplished by taking both function select
lines S₀ and S₁ high. This places the 3-state outputs in a high impedance state, which permits data applied to the
input/output lines to be clocked into the register. Reading out of the register can be done while the outputs are enabled
in any mode. A direct overriding clear input is provided to clear the register whether the outputs are enabled or
disabled.
Features
• High Speed Operation
• High Output Current: Fanout of 15 LSTTL Loads
• Wide Operating Voltage: V_CC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: I_CC (static) = 4 µA max (Ta = 25°C)
• Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
Package
Abbreviation
HD74HC299FPEL SOP-20 pin (JEITA)
PRSP0020DD-B _FP
(FP-20DAV)
HD74HC299RPEL SOP-20 pin (JEDEC)
PRSP0020DC-A
(FP-20DBV)
RP
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
EL (2,000 pcs/reel)
EL (1,000 pcs/reel)
Rev.2.00 Jan 31, 2006 page 1 of 8