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74F30240 数据表(PDF) 2 Page - NXP Semiconductors |
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74F30240 数据表(HTML) 2 Page - NXP Semiconductors |
2 / 10 page Philips Semiconductors Product specification 74F30240*, 74F30244 30 Ω line drivers 74F30240 Octal 30 Ω line driver with enable, inverting (open collector) 74F30244 Octal 30 Ω line driver with enable, non-inverting (open collecor) 2 1999 Jan 08 853–1157 20619 * Discontinued part. Please see the Discontinued Products List. FEATURES • Ideal for driving transmission lines or backplanes. 160mA I OL ideal for applications with impedance as low as 30 Ω • Guaranteed threshold voltages on the incident wave while driving line as low as 30 Ω • High impedance NPN base inputs for reduced loading (20µA in High and Low states) • Ideal for applications which require high output drive and minimal bus loading • Octal interface • 74F30240 inverting • 74F30244 non-inverting • Open-Collector outputs sink 160mA • Multiple side pins are used for V CC and GND to reduce lead inductance (improves speed and noise immunity) • Available in 24-pin standard slim DIP (300mil) plastic, SOL or CERDIP packages DESCRIPTION The 74F30240 and 74F30244 are high current open collector octal buffers composed of eight inverters. The 74F30240 has inverting data paths and the 74F30244 has non-inverting paths. Each device has eight inverters with two Output Enables (OE0, OE1), each controlling four outputs. Both drivers are designed to deal with the low-impedance transmission line effects found on printed circuit boards when fast edge rates are used. The 160mA IOL provides ample power to achieve TTL switching voltages on the incident wave. TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74F30240 9.5ns 62.5mA 74F30244 10.5ns 69mA ORDERING INFORMATION DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C PACKAGE DRAWING NUMBER 24-pin Plastic Slim DIP (300mil) N74F30244N SOT222-1 24–pin Plastic SOL1 N74F30244D SOT137-1 NOTE: 1. Because of the high current sinking capability of these parts, the SOL package should only be used under the following conditions: a. 50% duty cycle, AND b. 3/5 of remaining 50% driving ≤ 100mA (leaving the remaining 2/5 of the drive ≤ 160mA) OR c. use ≤ 450 linear feet per minute forced air or other thermal mounting techniques. INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS DESCRIPTION 74F(U.L.) HIGH/LOW LOAD VALUE HIGH/LOW D0–D7 Data inputs 1.0/0.033 20 µA/20µA OE0–OE1 Output Enable inputs (Active Low) 1.0/0.033 20 µA/20µA Q0–Q7 Data outputs (OC) for 74F30240 OC/266.7 OC/160mA Q0–Q7 Data outputs (OC) for 74F30244 OC/266.7 OC/160mA NOTE: One (1.0) FAST unit load is defined as: 20 µA in the High state and 0.6mA in the Low state. OC = Open Collector. |
类似零件编号 - 74F30240 |
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类似说明 - 74F30240 |
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