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SN74LVC374
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOP
WITH 3-STATE OUTPUTS
SCAS296B – JANUARY 1993 – REVISED NOVEMBER 1994
•
•
•
•
EPIC
™
(Enhanced-Performance Implanted
CMOS) Submicron Process
Typical V
OLP
(Output Ground Bounce)
< 0.8 V at V
CC
= 3.3 V, T
A
= 25°C
Typical V
OHV
(Output V
OH
Undershoot)
> 2 V at V
CC
= 3.3 V, T
A
= 25°C
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
DB, DW, OR PW PACKAGE
(TOP VIEW)
description
This octal edge-triggered D-type flip-flop is
designed for 2.7-V to 3.6-V V
CC
operation.
OE
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLK
The SN74LVC374 features 3-state outputs designed specifically for driving highly capacitive or relatively
low-impedance loads. It is particularly suitable for implementing buffer registers, input/output (I/O) ports,
bidirectional bus drivers, and working registers.
On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels at the data (D) inputs.
A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high
or low) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines
significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without
interface or pullup components. OE does not affect internal operations of the latch. Old data can be retained
or new data can be entered while the outputs are in the high-impedance state.
The SN74LVC374 is characterized for operation from – 40°C to 85°C.
FUNCTION TABLE
(each flip-flop)
INPUTS
OE
L
L
L
H
CLK
↑
↑
H or L
X
D
H
L
X
X
OUTPUT
Q
H
L
Q0
Z
EPIC is a trademark of Texas Instruments Incorporated.
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.
Copyright
©
1994, Texas Instruments Incorporated
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
1
SN74LVC374
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOP
WITH 3-STATE OUTPUTS
SCAS296B – JANUARY 1993 – REVISED NOVEMBER 1994
logic symbol
†
OE
CLK
1
11
EN
C1
2
5
6
9
12
15
16
19
logic diagram (positive logic)
OE
CLK
1D
1
11
C1
3
2
1Q
1D
2D
3D
4D
5D
6D
7D
8D
3
4
7
8
13
14
17
18
1D
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
1D
To Seven Other Channels
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
‡
Supply voltage range, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 4.6 V
Input voltage range, V
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 4.6 V
Output voltage range, V
O
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to V
CC
+ 0.5 V
Input clamp current, I
IK
(V
I
< 0 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 50 mA
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
50 mA
Continuous output current, I
O
(V
O
= 0 to V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
50 mA
Continuous current through V
CC
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
100 mA
Maximum power dissipation at T
A
= 55°C (in still air) (see Note 2): DB package . . . . . . . . . . . . . . . . . 0.6 W
DW package . . . . . . . . . . . . . . . . . 1.6 W
PW package . . . . . . . . . . . . . . . . . 0.7 W
Operating free-air temperature range, T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 85°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.
NOTES: 1. This value is limited to 4.6 V maximum.
2. The maximum package power dissipation is calculated using a junction temperature of 150°C and a board trace length of 750 mils.
For more information, refer to the
Package Thermal Considerations
application note in the 1994
ABT Advanced BiCMOS Technology
Data Book,
literature number SCBD002B.
2
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
SN74LVC374
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOP
WITH 3-STATE OUTPUTS
SCAS296B – JANUARY 1993 – REVISED NOVEMBER 1994
recommended operating conditions (see Note 3)
MIN
VCC
VIH
VIL
VI
VO
IOH
IOL
∆t
/∆v
Supply voltage
High-level input voltage
Low-level input voltage
Input voltage
Output voltage
High-level
High level output current
Low level output current
Low-level
Input transition rise or fall rate
VCC = 2.7 V
VCC = 3 V
VCC = 2.7 V
VCC = 3 V
0
– 40
VCC = 2.7 V to 3.6 V
VCC = 2.7 V to 3.6 V
2.7
2
0.8
0
0
VCC
VCC
– 12
– 24
12
24
10
85
MAX
3.6
UNIT
V
V
V
V
V
mA
mA
ns / V
°C
TA
Operating free-air temperature
NOTE 3: Unused or floating inputs must be held high or low.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
IOH = – 100
µA
VOH
IOH = – 12 mA
IOH = – 24 mA
IOL = 100
µA
VOL
II
IOZ
ICC
IOL = 12 mA
IOL = 24 mA
VI = VCC or GND
VO = VCC or GND
VI = VCC or GND,
VCC = 3 V to 3.6 V,
Other inputs at VCC or GND
VI = VCC or GND
VO = VCC or GND
IO = 0
One input at VCC – 0.6 V,
TEST CONDITIONS
VCC†
MIN to MAX
2.7 V
3V
3V
MIN to MAX
2.7 V
3V
3.6 V
3.6 V
3.6 V
TA = – 40°C to 85°C
MIN
TYP
MAX
VCC – 0.2
2.2
2.4
2
0.2
0.4
0.55
±
5
±10
20
500
3.3 V
3.3 V
5.5
5.8
µA
µA
µA
µA
pF
pF
V
UNIT
V
n
ICC
Ci
Co
† For conditions shown as MIN or MAX, use the appropriate values under recommended operating conditions.
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (see Figure 1)
VCC = 3.3 V
±
0.3 V
MIN
fclock
tw
tsu
th
Clock frequency
Pulse duration, CLK high or low
Setup time, data before CLK↑
Hold time, data after CLK↑
0
5
2
2
MAX
100
VCC = 2.7 V
MIN
0
5
2
2
MAX
80
MHz
ns
ns
ns
UNIT
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
3
SN74LVC374
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOP
WITH 3-STATE OUTPUTS
SCAS296B – JANUARY 1993 – REVISED NOVEMBER 1994
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
fmax
tpd
ten
tdis
FROM
(INPUT)
TO
(OUTPUT)
VCC = 3.3 V
±
0.3 V
MIN
TYP
MAX
100
CLK
OE
OE
Q
Q
Q
1.5
1.5
1.5
150
4.9
4.1
4.2
8.5
8.5
7.5
VCC = 2.7 V
MIN
MAX
80
1.5
1.5
1.5
9.5
9.5
8.5
UNIT
MHz
ns
ns
ns
operating characteristics, V
CC
= 3.3 V, T
A
= 25°C
PARAMETER
Cpd
d
Power dissipation capacitance
Outputs enabled
Outputs disabled
TEST CONDITIONS
CL = 50 pF
pF,
f = 10 MHz
TYP
18
9
UNIT
pF
4
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
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