SN54F299_08 Datasheet, PDF (1/13 Pages) Texas Instruments – 8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS WITH 3-STATE OUTPUTS

ą
The SN54F299 is obsolete and no
longer supplied.
SN54F299, SN74F299
8ĆBIT UNIVERSAL SHIFT/STORAGE REGISTERS
WITH 3ĆSTATE OUTPUTSą
SDFS071B − MARCH 1987 − REVISED APRIL 2004
D Four Modes of Operation:
− Hold (Store)
− Shift Right
− Shift Left
− Load Data
D Operates With Outputs Enabled or at High
Impedance
D 3-State Outputs Drive Bus Lines Directly
D Can Be Cascaded for N-Bit Word Lengths
D Direct Overriding Clear
D Applications:
− Stacked or Pushdown Registers
− Buffer Storage
− Accumulator Registers
description/ordering information
SN54F299 . . . J PACKAGE
SN74F299 . . . DW, N, OR NS PACKAGE
(TOP VIEW)
S0 1
OE1 2
OE2 3
G/Q_G 4
E/Q_E 5
C/Q_C 6
A/Q_A 7
Q_A′ 8
CLR 9
GND 10
20 V_CC
19 S1
18 SL
17 Q_H′
16 H/Q_H
15 F/Q_F
14 D/Q_D
13 B/Q_B
12 CLK
11 SR
SN54F299 . . . FK PACKAGE
(TOP VIEW)
These 8-bit universal shift /storage registers
feature multiplexed I/O ports to achieve full 8-bit
data handling in a single 20-pin package. Two
function-select (S0, S1) inputs and two
output-enable (OE1, OE2) inputs can be used to
choose the modes of operation listed in the
function table.
Synchronous parallel loading is accomplished by
G/Q_G
E/Q_E
C/Q_C
A/Q_A
Q_A′
3 2 1 20 19
4
18
5
17
6
16
7
15
8
14
9 10 11 12 13
SL
Q_H′
H/Q_H
F/Q_F
D/Q_D
taking both S0 and S1 high. This places the
3-state outputs in a high-impedance state and
permits data that is applied on the I/O ports to
be clocked into the register. Reading out of the register can be accomplished while the outputs are enabled in
any mode. Clearing occurs when the clear (CLR) input is low. Taking either OE1 or OE2 high disables the outputs
but has no effect on clearing, shifting, or storage of data.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N
Tube of 20
SN74F299N
SN74F299N
0°C to 70°C
SOIC − DW
Tube of 25
Reel of 2000
SN74F299DW
SN74F299DWR
F299
SOP − NS
Reel of 2000 SN74F299NSR
74F299
† _{Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are}
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright  2004, Texas Instruments Incorporated
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