SN74ALS688NAlternatives & Equivalent Parts
About SN74ALS688N
SN74ALS688N is a Integrated Circuit component manufactured by Texas Instruments. It comes in a Dual-In-Line Packages package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
Specification Comparison
| Parameter | SN74ALS688NSource | SN74ALS688NS | SN74ALS688DW | SN74ALS520N | SN74ALS521N | SN74ALS688DWR | SN74ALS688DWG4 |
|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package Type | Dual-In-Line Packages | Small Outline Packages | Small Outline Packages | Dual-In-Line Packages | Dual-In-Line Packages | Small Outline Packages | Small Outline Packages |
| Pin Count | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Temperature Range | ~ 70.0°C | — | ~ 70.0°C | ~ 70.0°C | ~ 70.0°C | ~ 70.0°C | ~ 70.0°C |
| Price | $3.7440 | — | $3.5640 | $2.0875 | $0.5200 | $2.1000 | $5.7853 |
| Electrical Parameters | |||||||
| Pbfree Code | Yes | — | — | Yes | Yes | Yes | Yes |
| YTEOL | 15 | — | 0 | 15 | 15 | 15 | 0 |
| Additional Feature | CASCADABLE | — | CASCADABLE | WITH PULL-UP RESISTORS ON Q INPUTS; CASCADABLE | WITH PULL-UP RESISTORS ON Q INPUTS; CASCADABLE | CASCADABLE | CASCADABLE |
| Family | ALS | — | ALS | ALS | ALS | ALS | ALS |
| JESD-30 Code | R-PDIP-T20 | — | R-PDSO-G20 | R-PDIP-T20 | R-PDIP-T20 | R-PDSO-G20 | R-PDSO-G20 |
| JESD-609 Code | e4 | — | e4 | e4 | e4 | e4 | e4 |
| Load Capacitance (CL) | 50 pF | — | 50 pF | 50 pF | 50 pF | 50 pF | 50 pF |
| Logic IC Type | IDENTITY COMPARATOR | — | IDENTITY COMPARATOR | IDENTITY COMPARATOR | IDENTITY COMPARATOR | IDENTITY COMPARATOR | IDENTITY COMPARATOR |
| Max I(ol) | 0.024 A | — | 0.024 A | 0.024 A | 0.024 A | 0.024 A | 0.024 A |
| Number of Bits | 8 | — | 8 | 8 | 8 | 8 | 8 |
| Number of Functions | 8 | — | 8 | 8 | 8 | 8 | 8 |
| Output Characteristics | TOTEM-POLE | — | TOTEM-POLE | 3-STATE | 3-STATE | TOTEM-POLE | TOTEM-POLE |
| Output Polarity | INVERTED | — | INVERTED | INVERTED | INVERTED | INVERTED | INVERTED |
| Package Body Material | PLASTIC/EPOXY | — | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY |
| Package Equivalence Code | DIP20,.3 | — | SOP20,.4 | DIP20,.3 | DIP20,.3 | SOP20,.4 | SOP20,.4 |
| Package Shape | RECTANGULAR | — | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR |
| Package Style | IN-LINE | — | SMALL OUTLINE | IN-LINE | IN-LINE | SMALL OUTLINE | SMALL OUTLINE |
| Packing Method | TUBE | — | TUBE | TUBE | TUBE | TR | TUBE |
| Power Supply Current-Max (ICC) | 19 mA | — | 19 mA | 19 mA | 19 mA | 19 mA | 19 mA |
| Prop. Delay@Nom-Sup | 22 ns | — | 22 ns | 20 ns | 22 ns | 22 ns | 22 ns |
| Propagation Delay (tpd) | 20 ns | — | 20 ns | 20 ns | 20 ns | 20 ns | 20 ns |
| Qualification Status | Not Qualified | — | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5 V | — | 5.5 V | 5.5 V | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage-Min (Vsup) | 4.5 V | — | 4.5 V | 4.5 V | 4.5 V | 4.5 V | 4.5 V |
| Supply Voltage-Nom (Vsup) | 5 V | — | 5 V | 5 V | 5 V | 5 V | 5 V |
| Surface Mount | NO | — | YES | NO | NO | YES | YES |
| Technology | TTL | — | TTL | TTL | TTL | TTL | TTL |
| Temperature Grade | COMMERCIAL | — | COMMERCIAL | COMMERCIAL | COMMERCIAL | COMMERCIAL | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) | — | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE | — | GULL WING | THROUGH-HOLE | THROUGH-HOLE | GULL WING | GULL WING |
| Terminal Pitch | 2.54 mm | — | 1.27 mm | 2.54 mm | 2.54 mm | 1.27 mm | 1.27 mm |
| Terminal Position | DUAL | — | DUAL | DUAL | DUAL | DUAL | DUAL |
| Peak Reflow Temperature (Cel) | — | — | 260 | — | — | 260 | 260 |
| Time@Peak Reflow Temperature-Max (s) | — | — | NOT SPECIFIED | — | — | 30 | NOT SPECIFIED |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Quick Links
Identity Comparator, ALS Series, 8-Bit, Inverted Output, TTL, PDSO20
Identity Comparator, ALS Series, 8-Bit, Inverted Output, TTL, PDSO20
Identity Comparator, ALS Series, 8-Bit, Inverted Output, TTL, PDSO20
Why Look for Alternatives?
Finding alternatives for SN74ALS688N is essential for supply chain resilience. Component shortages, long lead times, and end-of-life notices can disrupt production schedules. Having verified alternative parts ensures your designs remain manufacturable.
When evaluating SN74ALS688N replacements, consider key parameters such as package compatibility, electrical specifications, and operating temperature range. Our engineering team can help verify pin-to-pin compatibility for your specific application.
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What is equivalent to SN74ALS688N?
Known equivalents for SN74ALS688N include SN74ALS688NS, SN74ALS688DW, SN74ALS520N. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of SN74ALS688N?
In many cases, yes. Cross-manufacturer alternatives exist for most standard components. However, always verify pin compatibility, electrical specs, and package dimensions before substituting in production.
How do I verify SN74ALS688N alternatives?
Compare the datasheet specifications including pinout, voltage ratings, timing parameters, and package dimensions. FindMyChip's engineering team can help with compatibility verification — submit an RFQ to get started.