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74HC/HCT7540
General description
The 74HC/HCT7540 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.
The 74HC/HCT7540 are octal Schmitt trigger inverting buffer/line drivers with 3-state outputs. The 3-state outputs are controlled by the output enable inputs OE1 and OE2.
A HIGH on OEn causes the outputs to assume a high impedance OFF-state.
The Schmitt trigger action in the data inputs transforms slowly changing input signals into sharply defined jitter-free output signals.
The '7540' is identical to the '540' but has hysteresis on the data inputs.
Features
- Inverting outputs
- Schmitt trigger action on all data inputs
- Output capability: bus driver
- ICC category: MSI
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| 74HC7540D | 74HC7540D | 9339 678 60112 | Volume production | SOT163-1
(SO20) | Bulk Pack | Standard Marking | 74HC7540D
| week 30, 2004 |
| 74HC7540D | 74HC7540D-T | 9339 678 60118 | Volume production | SOT163-1
(SO20) | Tape reel smd | Standard Marking | 74HC7540D
| week 30, 2004 |
| 74HC7540DB | 74HC7540DB | 9351 902 90112 | Volume production | SOT339-1
(SSOP20) | Tube | Standard Marking | 74HC7540DB
| week 13, 2005 |
| 74HC7540DB | 74HC7540DB-T | 9351 902 90118 | Volume production | SOT339-1
(SSOP20) | Reel Pack, SMD, 13" | Standard Marking | 74HC7540DB
| week 13, 2005 |
| 74HC7540N | 74HC7540N | 9339 678 40112 | Volume production | SOT146-1
(DIP20) | Bulk Pack | Standard Marking | 74HC7540N
| Always Pb-free |
| 74HCT7540D | 74HCT7540D | 9339 679 00112 | Volume production | SOT163-1
(SO20) | Bulk Pack | Standard Marking | 74HCT7540D
| week 30, 2004 |
| 74HCT7540D | 74HCT7540D-T | 9339 679 00118 | Volume production | SOT163-1
(SO20) | Tape reel smd | Standard Marking | 74HCT7540D
| week 30, 2004 |
| 74HCT7540N | 74HCT7540N | 9339 678 80112 | Volume production | SOT146-1
(DIP20) | Bulk Pack | Standard Marking | 74HCT7540N
| Always Pb-free |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|
| 74HC7540D | 9339 678 60112 | 0.8400 | NA | ARROW ELECTRONICS | 655 | 1/6/2009 | Buy online | Order samples | |
| NA | AVNET ELECTRONICS MARKETING | 1,520 | 1/7/2009 | Buy online | |||||
| NA | DIGI-KEY CORPORATION | 589 | 1/6/2009 | Buy online | |||||
| 74HC7540D | 9339 678 60118 | 0.8400 | NA | MOUSER ELECTRONICS | 695 | 1/7/2009 | Buy online | not available | |
| 74HC7540DB | 9351 902 90112 | 0.8400 | NA | AVNET ELECTRONICS MARKETING | 774 | 1/7/2009 | Buy online | not available | |
| NA | DIGI-KEY CORPORATION | 277 | 1/6/2009 | Buy online | |||||
| 74HC7540DB | 9351 902 90118 | 0.8400 | NA | MOUSER ELECTRONICS | 920 | 1/7/2009 | Buy online | Order samples | |
| 74HC7540N | 9339 678 40112 | 0.8400 | NA | AVNET ELECTRONICS MARKETING | 720 | 1/7/2009 | Buy online | Order samples | |
| NA | DIGI-KEY CORPORATION | 51 | 1/6/2009 | Buy online | |||||
| 74HCT7540D | 9339 679 00112 | 0.8400 | NA | AVNET ELECTRONICS MARKETING | 750 | 1/7/2009 | Buy online | not available | |
| NA | DIGI-KEY CORPORATION | 1,254 | 1/6/2009 | Buy online | |||||
| NA | FUTURE ELECTRONICS | 935 | 1/7/2009 | Buy online | |||||
| 74HCT7540D | 9339 679 00118 | 0.8400 | Order samples | ||||||
| 74HCT7540N | 9339 678 80112 | 0.8400 | NA | AVNET ELECTRONICS MARKETING | 360 | 1/7/2009 | Buy online | Order samples | |
| NA | DIGI-KEY CORPORATION | 183 | 1/6/2009 | Buy online |
Applications
- Modem interface
- Voice/data telephone interface
- Lap-top computers
- UART interface
Parametrics/similar products
| Type number | Package | Description | Propagation Delay(ns) | Voltage | No. of Pins | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|
| 74HC7540D | SOT163-1
(SO20) | Octal Schmitt-Trigger Buffer/Line Driver; Inverting (3-State) | 11@5V | 2.0-6.0 V | 20 | Low Power or Battery Applications | CMOS | +/- 7.8 mA |
| 74HC7540DB | SOT339-1
(SSOP20) | Octal Schmitt-Trigger Buffer/Line Driver; Inverting (3-State) | 11@5V | 2.0-6.0 V | 20 | Low Power or Battery Applications | CMOS | +/- 7.8 mA |
| 74HC7540N | SOT146-1
(DIP20) | Octal Schmitt-Trigger Buffer/Line Driver; Inverting (3-State) | 11@5V | 2.0-6.0 V | 20 | Low Power or Battery Applications | CMOS | +/- 7.8 mA |
| 74HCT7540D | SOT163-1
(SO20) | Octal Schmitt-Trigger Buffer/Line Driver; Inverting; TTL Enabled (3-State) | 16 | 4.5-5.5 V | 20 | Low Power | TTL | +/- 6 mA |
| 74HCT7540N | SOT146-1
(DIP20) | Octal Schmitt-Trigger Buffer/Line Driver; Inverting; TTL Enabled (3-State) | 16 | 4.5-5.5 V | 20 | Low Power | TTL | +/- 6 mA |
Similar products
74HC/HCT7540
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