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74LVTH374WM 반도체 회로 부품 판매점

Low Voltage Octal D-Type Flip-Flop with 3-STATE Outputs



Fairchild Semiconductor 로고
Fairchild Semiconductor
74LVTH374WM 데이터시트, 핀배열, 회로
September 1999
Revised October 1999
74LVT374 • 74LVTH374
Low Voltage Octal D-Type Flip-Flop
with 3-STATE Outputs
General Description
The LVT374 and LVTH374 are high-speed, low-power
octal D-type flip-flops featuring separate D-type inputs for
each flip-flop and 3-STATE outputs for bus-oriented appli-
cations. A buffered Clock (CP) and Output Enable (OE) are
common to all flip-flops.
The LVTH374 data inputs include bushold, eliminating the
need for external pull-up resistors to hold unused inputs.
These octal flip-flops are designed for low-voltage (3.3V)
VCC applications, but with the capability to provide a TTL
interface to a 5V environment. The LVT374 and LVTH374
are fabricated with an advanced BiCMOS technology to
achieve high speed operation similar to 5V ABT while
maintaining low power dissipation.
Features
s Input and output interface capability to systems at
5V VCC
s Bus-Hold data inputs eliminate the need for external
pull-up resistors to hold unused inputs (74LVTH374),
also available without bushold feature (74LVT374).
s Live insertion/extraction permitted
s Power Up/Down high impedance provides glitch-free
bus loading
s Outputs source/sink 32 mA/+64 mA
s Functionally compatible with the 74 series 374
s Latch-up performance exceeds 500 mA
Ordering Code:
Order Number
74LVT374WM
74LVT374SJ
74LVT374MTC
74LVTH374WM
74LVTH374SJ
Package Number
Package Description
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LVTH374MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
IEEE/IEC
© 1999 Fairchild Semiconductor Corporation DS012016
www.fairchildsemi.com


74LVTH374WM 데이터시트, 핀배열, 회로
Connection Diagram
Pin Descriptions
Pin Names
D0–D7
CP
OE
O0–O7
Description
Data Inputs
Clock Pulse Input
3-STATE Output Enable Input
3-STATE Outputs
Truth Table
Inputs
Dn CP OE
HL
L L
XLL
XXH
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
= LOW-to-HIGH Transition
Oo = Previous Oo before HIGH-to-LOW of CP
Outputs
On
H
L
Oo
Z
Functional Description
The LVT374 and LVTH374 consist of eight edge-triggered
flip-flops with individual D-type inputs and 3-STATE true
outputs. The buffered clock and buffered Output Enable
are common to all flip-flops. The eight flip-flops will store
the state of their individual D inputs that meet the setup and
hold time requirements on the LOW-to-HIGH Clock (CP)
Logic Diagram
transition. With the Output Enable (OE) LOW, the contents
of the eight flip-flops are available at the outputs. When the
OE is HIGH, the outputs go to the high impedance state.
Operation of the OE input does not affect the state of the
flip-flops.
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
www.fairchildsemi.com
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74LVTH374WM flip-flop

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74LVTH374WM

Low Voltage Octal D-Type Flip-Flop with 3-STATE Outputs - Fairchild Semiconductor