74HC7540; 74HCT7540

Octal Schmitt trigger buffer/line driver; 3-state; inverting

The 74HC7540; 74HCT7540 is an 8-bit inverting buffer/line driver with Schmitt-trigger inputs and 3-state outputs. The device features two output enables (OE1 and OE2). A HIGH on OEn causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of V_CC. Schmitt trigger inputs transform slowly changing input signals into sharply defined jitter-free output signals.

Features and benefits

Wide supply voltage range from 2.0 to 6.0 V
CMOS low power dissipation
High noise immunity
Unlimited input rise and fall times
Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
Inverting outputs
Input levels:
- For 74HC7540: CMOS level
- For 74HCT7540: TTL level
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 from -40 °C to +125 °C

Parametrics

Type number	Product status	V_CC (V)	Logic switching levels	Output drive capability (mA)	f_max (MHz)	Nr of bits	Power dissipation considerations	T_amb (°C)	R_th(j-a) (K/W)	R_th(j-c) (K/W)	Package name
74HC7540D	Production	2.0 - 6.0	CMOS	± 7.8	36	8	low	-40~125	69	45	SO20
74HC7540PW	Production	2.0 - 6.0	CMOS	± 7.8	36	8	low	-40~125	100	45	TSSOP20
74HCT7540D	Production	4.5 - 5.5	TTL	± 6	36	8	low	-40~125	69	45	SO20

Package

Type number	Package	Package information	Reflow-/Wave soldering	Packing	Status	Marking	Orderable part number, (Ordering code (12NC))
74HC7540D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_118	Active	74HC7540D	74HC7540D,118 ( 9339 678 60118 )
74HC7540PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_118	Active	4HC7540	74HC7540PWJ ( 9356 912 07118 )
74HCT7540D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_118	Active	74HCT7540D	74HCT7540D,118 ( 9339 679 00118 )

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type number	Package	Package information	Reflow-/Wave soldering	Packing	Status	Marking	Orderable part number, (Ordering code (12NC))
74HC7540D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_112	Withdrawn / End-of-life	74HC7540D	74HC7540D,112 ( 9339 678 60112 )
74HCT7540D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_112	Withdrawn / End-of-life	74HCT7540D	74HCT7540D,112 ( 9339 679 00112 )

Discontinuation information

Type number	Orderable part number, (Ordering code (12NC))	Last time buy date	Last time delivery date	Replacement product	Status	Comments
74HC7540D	933967860112	2021-12-31	2022-06-30	74HC7540D
74HCT7540D	933967900112	2021-12-31	2022-06-30	74HCT7540D

Environmental information

Type number	Orderable part number	Chemical content	Leadfree conversion date
74HC7540D	74HC7540D,118	74HC7540D	week 30, 2004
74HC7540PW	74HC7540PWJ	74HC7540PW
74HCT7540D	74HCT7540D,118	74HCT7540D	week 30, 2004

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type number	Orderable part number	Chemical content	RoHS	RHF-indicator	Leadfree conversion date
74HC7540D	74HC7540D,112	74HC7540D			week 30, 2004
74HCT7540D	74HCT7540D,112	74HCT7540D			week 30, 2004

Quality and reliability disclaimer

Documentation (5)

File name	Title	Type	Date
74HC_HCT7540	Octal Schmitt trigger buffer/line driver; 3-state; inverting	Data sheet	2023-11-09
SSOP-TSSOP-VSO-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08
SOT360-1	plastic, thin shrink small outline package; 20 leads; 0.65 mm pitch; 6.5 mm x 4.4 mm x 1.1 mm body	Package information	2022-06-21
SOT163-1	plastic, small outline package; 20 leads; 1.27 mm pitch; 12.8 mm x 7.5 mm x 2.65 mm body	Package information	2022-06-20
WAVE_BG-BD-1	Wave soldering profile	Wave soldering	2021-09-08

Support

If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.

Ordering, pricing & availability

Sample

As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: https://extranet.nexperia.com.

Sample orders normally take 2-4 days for delivery.

If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.