MC74HCT374A_14 Datasheet, PDF (1/7 Pages) ON Semiconductor – Octal 3-State Noninverting D Flip-Flop with LSTTL-Compatible Inputs

MC74HCT374A
Octal 3-State Noninverting
D Flip-Flop with
LSTTL-Compatible Inputs
High−Performance Silicon−Gate CMOS
The MC74HCT374A may be used as a level converter for
interfacing TTL or NMOS outputs to High−Speed CMOS inputs.
The HCT374A is identical in pinout to the LS374.
Data meeting the setup and hold time is clocked to the outputs with
the rising edge of Clock. The Output Enable does not affect the state of
the flip−flops, but when Output Enable is high, the outputs are forced
to the high−impedance state. Thus, data may be stored even when the
outputs are not enabled.
The HCT374A is identical in function to the HCT574A, which has
the input pins on the opposite side of the package from the output pins.
This device is similar in function to the HCT534A, which has
inverting outputs.
Features
• Output Drive Capability: 15 LSTTL Loads
• TTL/NMOS−Compatible Input Levels
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 4.5 to 5.5 V
• Low Input Current: 1.0 mA
• In Compliance With the JEDEC Standard No. 7.0 A Requirements
• Chip Complexity: 276 FETs or 69 Equivalent Gates
• Improvements over HCT374
♦ Improved Propagation Delays
♦ 50% Lower Quiescent Power
♦ Improved Input Noise and Latchup Immunity
• These Devices are Pb−Free and are RoHS Compliant
LOGIC DIAGRAM
D0 ³
D1 ⁴
DATA
INPUTS
D2 ⁷
D3 ⁸
D4 ¹³
D5 ¹⁴
D6 ¹⁷
D7 ¹⁸
CLOCK ¹¹
2 _Q0
5 _Q1
6 _Q2
9 _Q3
12 _Q4
15 _Q5
16 _Q6
19 _Q7
NONINVERTING
OUTPUTS
OUTPUT ENABLE ¹
PIN 20 = V_CC
PIN 10 = GND
© Semiconductor Components Industries, LLC, 2014
1
September, 2014 − Rev. 12
http://onsemi.com
SOIC−20
DW SUFFIX
CASE 751D
TSSOP−20
DT SUFFIX
CASE 948E
PIN ASSIGNMENT
OUTPUT ENABLE 1
Q0 2
D0 3
D1 4
Q1 ⁵
Q2 6
D2 7
D3 8
Q3 9
GND 10
20 V_CC
19 Q7
18 D7
17 D6
16 Q6
15 Q5
14 D5
13 D4
12 Q4
11 CLOCK
MARKING DIAGRAMS
20
20
HCT374A
AWLYYWWG
HCT
374A
ALYWG
G
1
SOIC−20
1
TSSOP−20
A
WL, L
YY, Y
WW, W
G or G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
FUNCTION TABLE
Inputs
Output
Output
Enable Clock D
Q
L
L
L
L,H,
H
X
H
H
L
L
X No Change
X
Z
X = don’t care
Z = high impedance
ORDERING INFORMATION
See detailed ordering and shipping information on page 5 of
this data sheet.
Publication Order Number:
MC74HCT374A/D