Document
74HC280; 74HCT280
9-bit odd/even parity generator/checker
Rev. 4 — 16 August 2021
Product data sheet
1. General description
The 74HC280; 74HCT280 is a 9-bit parity generator or checker. Both even and odd parity outputs are available. The even parity output (PE) is HIGH when an even number of data inputs (I0 to I8) is HIGH. The odd parity output (PO) is HIGH when an odd number of data inputs are HIGH. Expansion to larger word sizes is accomplished by tying the even outputs (PE) of up to nine parallel devices to the final stage data inputs. Inputs include clamp diodes. It enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.
2. Features and benefits
• Word-length easily expanded by cascading • Generates either odd or even parity for nine data bits • Wide supply voltage range from 2.0 to 6.0 V • Input levels:
• For 74HC280: CMOS level • For 74HCT280: TTL level • CMOS low power dissipation • High noise immunity • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B • Complies with JEDEC standards • JESD8C (2.7 V to 3.6 V) • JESD7A (2.0 V to 6.0 V) • 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
3. Ordering information
Table 1. Ordering information
Type number
Temperature range
74HC280D
-40 °C to +125 °C
74HCT280D
74HCT280PW -40 °C to +125 °C
Name SO14 TSSOP14
Description
plastic small outline package; 14 leads; body width 3.9 mm
plastic thin shrink small outline package; 14 leads; body width 4.4 mm
Version SOT108-1 SOT402-1
Nexperia
4. Functional diagram
Fig. 1. Logic symbol
I0 I1 I2
I3 I4 I5
I6 I7 I8
Fig. 2. Logic diagram
74HC280; 74HCT280
9-bit odd/even parity generator/checker
8 I0 9 I1 10 I2 11 I3 12 I4 13 I5 1 I6 2 I7 4 I8
PE 5 PO 6 aaa-024423
PE
PO aaa-024424
74HC_HCT280
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 16 August 2021
© Nexperia B.V. 2021. All rights reserved
2 / 13
Nexperia
5. Pinning information
74HC280; 74HCT280
9-bit odd/even parity generator/checker
5.1. Pinning
74HC280 74HCT280
I6 1
14 VCC
I7 2
13 I5
n.c. 3
12 I4
I8 4
11 I3
PE 5
10 I2
PO 6
9 I1
GND 7
8 I0
aaa-024425
Fig. 3. Pin configuration SOT108-1 (SO14)
74HCT280
I6 1 I7 2 n.c. 3 I8 4 PE 5 PO 6 GND 7
14 VCC 13 I5 12 I4 11 I3 10 I2 9 I1 8 I0
aaa-024426
Fig. 4. Pin configuration SOT402-1 (TSSOP14)
5.2. Pin description
Table 2. Pin description Symbol I0, I1, I2, I3, I4, I5, I6, I7, I8 GND PE PO VCC
Pin 8, 9, 10, 11, 12, 13, 1, 2, 4 7 5 6 14
6. Functional description
Table 3. Function table H = HIGH voltage level; L = LOW voltage level
Inputs
Outputs
number of HIGH data inputs (I0 to I8) PE
even
H
odd
L
Description data input ground (0 V) even parity output odd parity output supply voltage
PO L H
74HC_HCT280
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 16 August 2021
© Nexperia B.V. 2021. All rights reserved
3 / 13
Nexperia
74HC280; 74HCT280
9-bit odd/even parity generator/checker
7. Limiting values
Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
Min
Max Unit
VCC IIK IOK IO ICC IGND Tstg Ptot
supply voltage input clamping current output clamping current output current supply current ground current storage temperature total power dissipation
VI < -0.5 V or VI > VCC + 0.5 V VO < -0.5 V or VO > VCC + 0.5 V -0.5 V < VO < VCC + 0.5 V
-0.5 [1] [1] -
-50 -65 [2] -
+7 V ±20 mA ±20 mA ±25 mA 50 mA
- mA +150 °C 500 mW
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed. [2] For SOT108-1 (SO14) package: Ptot derates linearly with 10.1 mW/K above 100 °C.
For SOT402-1 (TSSOP14) package: Ptot derates linearly with 7.3 mW/K above 81 °C.
8. Recommended operating conditions
Table 5. Recommended operating conditions Voltages are referenced to GND (ground = 0 V)
Symbol Parameter
Conditions
VCC VI VO Tamb Δt/ΔV
supply voltage input voltage output voltage ambient temperature input transition rise and fall rate
VCC = 2.0 V VCC = 4.5 V VCC = 6.0 V
74HC280
Min Typ Max
2.0
5.0
6.0
0
-
VCC
0
-
VCC
-40 +25 +125
-
-
625
-
1.67 139
-
-
83
74HCT280
Min Typ Max
4.5
5.0
5.5
0
-
VCC
0
-
VCC
-40 +25 +125
-
-
-
-
1.67 139
-
-
-
Unit
V V V °C ns/V ns/V ns/V
74HC_HCT280
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 16 August 2021
© Nexperia B.V. 2021. All rights reserved
4 / 13
Nexperia
74HC280; 74HCT280
9-bit odd/even parity generator/checker
9. Static characteristics
Table 6. Static characteristics At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Paramete.