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74HC374D,653

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
74HC374; 74HCT374
Octal D-type flip-flop; positive edge-trigger; 3-state
Rev. 3 — 20 February 2018 Product data sheet
1 General description
The 74HC374; 74HCT374 is an octal positive-edge triggered D-type flip-flop with
3‑state outputs. The device features a clock (CP) and output enable (OE) inputs. The
flip‑flops will store the state of their individual D-inputs that meet the set-up and hold
time requirements on the LOW-to-HIGH clock (CP) transition. A HIGH on OE causes
the outputs to assume a high-impedance OFF-state. Operation of the OE input does not
affect the state of the flip-flops. Inputs also include clamp diodes, this enables the use of
current limiting resistors to interface inputs to voltages in excess of V
CC
.
The 74HCT374 features reduced input threshold levels to allow interfacing to TTL logic
levels.
2 Features and benefits
• Input levels:
– For 74HC374: CMOS level
– For 74HCT374: TTL level
• Octal bus interface
• Non-inverting 3-state outputs
• 8-bit positive, edge-triggered register
• Common 3-state output enable input
• Independent register and 3-state buffer operation
• Complies with JEDEC standard no. 7 A
• ESD protection:
– HBM JESD22-A114F exceeds 2000 V
– MM JESD22-A115-A exceeds 200 V
• Specified from -40 °C to +85 °C and -40 °C to +125 °C
Nexperia
74HC374; 74HCT374
Octal D-type flip-flop; positive edge-trigger; 3-state
74HC_HCT374 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2018. All rights reserved.
Product data sheet Rev. 3 — 20 February 2018
2 / 17
3 Ordering information
Table 1. Ordering information
PackageType number
Temperature range Name Description Version
74HC374D
74HCT374D
−40 °C to +125 °C SO20 plastic small outline package; 20 leads;
body width 7.5 mm
SOT163-1
74HC374DB
74HCT374DB
−40 °C to +125 °C SSOP20 plastic shrink small outline package; 20 leads;
body width 5.3 mm
SOT339-1
74HC374PW
74HCT374PW
−40 °C to +125 °C TSSOP20 plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
SOT360-1
4 Functional diagram
mna891
D0
D1
D2
D3
D4
D5
D6
D7
OE
CP
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
11
1
19
16
15
12
9
6
5
2
18
17
14
13
8
7
4
3
Figure 1. Logic symbol
mna196
19
16
15
12
9
6
5
11
C1
1
EN
1D
2
18
17
14
13
8
7
4
3
Figure 2. IEC logic symbol
mna892
3-STATE
OUTPUTS
FF1
to
FF8
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7 19
16
15
12
9
6
5
2
D0
D1
D2
D3
D4
D5
D6
D7
CP
OE
18
11
1
17
14
13
8
7
4
3
Figure 3. Functional diagram
mna893
Q4
D4
Q3
D3
Q2
D2
Q1
D1
Q0
D0
D
FF1
Q
CP
CP
D
FF2
Q
CP
D
FF3
Q
CP
D
FF4
Q
CP
D
FF5
Q
CP
D
FF6
Q
CP
D
FF7
Q
CP
D
FF8
Q
CP
OE
Q5
D5
Q6
D6
Q7
D7
Figure 4. Logic diagram
Nexperia
74HC374; 74HCT374
Octal D-type flip-flop; positive edge-trigger; 3-state
74HC_HCT374 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2018. All rights reserved.
Product data sheet Rev. 3 — 20 February 2018
3 / 17
5 Pinning information
5.1 Pinning
74HC374
74HCT374
OE V
CC
Q0 Q7
D0 D7
D1 D6
Q1 Q6
Q2 Q5
D2 D5
D3 D4
Q3 Q4
GND CP
aaa-028158
1
2
3
4
5
6
7
8
9
10
12
11
14
13
16
15
18
17
20
19
Figure 5. Pin configuration SO20
74HC374
74HCT374
aaa-028159
1
2
3
4
5
6
7
8
9
10
12
11
14
13
16
15
18
17
20
19
OE V
CC
Q0 Q7
D0 D7
D1 D6
Q1 Q6
Q2 Q5
D2 D5
D3 D4
Q3 Q4
GND CP
Figure 6. Pin configuration (T)SSOP20
5.2 Pin description
Table 2. Pin description
Symbol Pin Description
D0, D1, D2, D3, D4, D5, D6, D7 3, 4, 7, 8, 13, 14, 17, 18 data inputs
Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7 2, 5, 6, 9, 12, 15, 16, 19 data outputs
OE 1 output enable input (active LOW)
CP 11 clock pulse input (active rising edge)
GND 10 ground (0 V)
V
CC
20 supply voltage
6 Functional description
Table 3. Function table
[1]
Input OutputOperating mode
OE CP Dn
Internal
flip-flops
Qn
L ↑ l L LLoad and read register
L ↑ h H H
H ↑ l L ZLoad register and disable outputs
H ↑ h H Z
[1] H = HIGH voltage level;
L = LOW voltage level;
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH clock transition;
l = LOW voltage level one set-up time prior to the LOW-to-HIGH clock transition;
Z = high-impedance OFF-state;
↑ = LOW-to-HIGH clock transition.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

74HC374D,653

Mfr. #:
Buy 74HC374D,653
Manufacturer:
Nexperia
Description:
Flip Flops OCTAL D F/F 3STATE
Lifecycle:
New from this manufacturer.
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