Texas Instruments SN74F299DW, SN74F299DWR, SN74F299N, SN74F299N3 Datasheet
SN54F299, SN74F299
8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS
WITH 3-STATE OUTPUTS
SDFS071A – MARCH 1987 – REVISED OCTOBER 1993
• Four Modes of Operation:
Hold (Store)
Shift Right
Shift Left
Load Data
• Operates With Outputs Enabled or at High
Impedance
• 3-State Outputs Drive Bus Lines Directly
• Can Be Cascaded for N-Bit Word Lengths
• Direct Overriding Clear
• Applications:
Stacked or Push-Down Registers
Buffer Storage
SN54F299 ...J PACKAGE
SN74F299 . . . DW OR N PACKAGE
G/Q
OE1
OE2
E/Q
C/Q
A/Q
Q
CLR
GND
S0
G
E
C
A
A′
(TOP VIEW)
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
V
CC
S1
SL
Q
H′
H/Q
F/Q
D/Q
B/Q
CLK
SR
H
F
D
B
Accumulator Registers
• Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
SN54F299 . . . FK PACKAGE
(TOP VIEW)
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
description
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
choose the modes of operation listed in the
function table.
, OE2) inputs can be used to
G/Q
E/Q
C/Q
A/Q
Q
3212019
4
G
5
E
6
C
7
A
8
A′
OE2
910111213
CLR
OE1
GND
S0
SR
CC
V
CLK
S1
18
17
16
15
14
B
B/Q
SL
Q
H′
H/Q
F/Q
D/Q
H
F
D
Synchronous parallel loading is accomplished by
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
Taking either OE1
or OE2 high disables the outputs but has no effect on clearing, shifting, or storage of data.
) input is low.
The SN54F299 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74F299 is characterized for operation from 0°C to 70°C.
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.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1993, Texas Instruments Incorporated
2–1
SN54F299, SN74F299
MODE
8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS
WITH 3-STATE OUTPUTS
SDFS071A – MARCH 1987 – REVISED OCT OBER 1993
FUNCTION TABLE
INPUTS I/O PORTS OUTPUTS
CLR S1 S0 OE1†OE2†CLK SL SR A/QAB/QBC/QCD/QDE/QEF/QFG/QGH/QHQA′Q
L
X
L
L
L
L
X
Clear
L
H
Hold
Shift
RightHHLLHH
Shift
LeftHHHHLL
Load H H H X X ↑ X X a b c d e f g h a h
NOTE: a ...h = the level of the steady-state input at inputs A through H, respectively. This data is loaded into the flip-flops while the flip-flop outputs
†
When one or both output-enable inputs are high the eight I/O terminals are disabled to the high-impedance state; however, sequential operation
or clearing of the register is not affected.
HHLXL
are isolated from the I/O terminals.
L
H
X
L
X
L
L
L
L
L
L
X
X
L
X
X
X
X
X
L
XLXXXXQ
L
L
↑↑XXHLHLQ
L
L
↑↑HLXXQ
L
X
L
L
L
L
L
L
L
L
X
L
L
L
L
L
L
L
L
X
X
X
X
X
X
X
X
X
Q
Q
Q
Q
Q
Q
Q
A0
B0
C0
D0
E0
F0
Q
Q
Q
Q
Q
A0
B0
C0
D0
Q
An
Q
An
Q
Bn
Bn
Cn
Q
Cn
Q
Q
Bn
Bn
Dn
Dn
Cn
Q
Cn
Q
En
Q
En
Q
Q
Q
Q
E0
Q
Q
Dn
Q
Q
Dn
Q
Q
Fn
Q
Q
Fn
F0
En
En
Gn
Gn
G0
Q
G0
Q
Fn
Q
Fn
Q
Hn
Q
Hn
H0
Q
H0
Q
Gn
Q
Gn
HLQ
Q
Q
Q
L
L
L
A0
A0
HLQ
Bn
Bn
H′
L
L
L
Q
H0
Q
H0
Gn
Q
Gn
H
L
logic symbol
‡
CLR
OE1
OE2
CLK
A/Q
B/Q
C/Q
D/Q
E/Q
F/Q
G/Q
H/Q
S0
S1
SR
SL
9
2
3
1
19
12
11
7
A
13
B
6
C
14
D
5
E
15
F
4
G
16
H
18
R
&
0
M
1
C4/1→/2→
1,4D
3,4D
5
3,4D
5
3,4D
5
2,4D
SRG8
3
EN5
0
3
17
8
Q
A′
Q
H′
‡
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
1
S0
19
S1
11
SR
(shift right
serial input)
12
CLK
SN54F299, SN74F299
8-BIT UNIVERSAL SHIFT/STORAGE REGISTERS
WITH 3-STATE OUTPUTS
SDFS071A – MARCH 1987 – REVISED OCTOBER 1993
18
SL
(shift left
serial input)
Six
Identical
Channels
Not
†
Shown
1D
C1
RR
8
Q
A′
9
CLR
2
OE1
3
OE2
†
I/O ports not shown: B/QB (13), C/QC (6), D/QD (14), E/QE (5), F/QF (15), and G/QG (4).
716
A/Q
A
H/Q
1D
C1
17
Q
H′
H
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
Input voltage range, V
Input current range –30 mA to 5 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the disabled or power-off state –0.5 V to 5.5 V. . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high state –0.5 V to V
Current into any output in the low state: Q
Operating free-air temperature range: SN54F299 –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‡
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.
–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
(see Note 1) –1.2 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
or QH′ 40 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A′
SN54F299 (Q
SN74F299 (Q
thru QH) 40 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A
thru QH) 48 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A
SN74F299 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
‡
CC
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
2–3
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