74LS245

74LS245 SYC | Alldatasheet

Document overview

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• PDF pages: 6

Technical content

Features

■ Bi-Directional bus transceiver in a high-density 20-pin package ■ 3-STATE outputs drive bus lines directly ■ PNP inputs reduce DC loading on bus lines ■ Hysteresis at bus inputs improve noise margins ■ Typical propagation delay times, port-to-port 8 ns ■ Typical enable/disable times 17 ns ■ IOL (sink current) 24 mA ■ IOH (source current) −15 mA Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table H = HIGH Level L = LOW Level X = Irrelevant Order Number Package Number Package Description DM74LS245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide DM74LS245SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74LS245N N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Enable Direction Operation G Control DIR L L B Data to A Bus L H A Data to B Bus HX I s o l a t i o n www.sycelectronica.com.ar

Absolute Maximum Ratings(Note 1) Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Recommended Operating Conditions

Electrical Characteristics

over recommended operating free air temperature range (unless otherwise noted) Note 2: All typicals are at VCC = 5V, TA = 25°C. Note 3: Not more than one output should be shorted at a time, not to exceed one second duration Supply Voltage 7V Input Voltage DIR or G 7V A or B 5.5V Operating Free Air Temperature Range 0°C to +70°C Storage Temperature Range −65°C to +150°C Symbol Parameter Min Nom Max Units VCC Supply Voltage 4.75 5 5.25 V VIH HIGH Level Input Voltage 2 V VIL LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −15 mA IOL LOW Level Output Current 24 mA TA Free Air Operating Temperature 0 70 °C Symbol Parameter Conditions Min Typ Max Units (Note 2) VI Input Clamp Voltage V CC = Min, II = −18 mA −1.5 V HYS Hysteresis (V T+ − VT−)V CC = Min 0.2 0.4 V VOH HIGH Level V CC = Min, VIH = Min 2.7 Output Voltage V IL = Max, IOH = −1 mA VCC = Min, VIL = Min 2.4 3.4 V VIL = Max, IOH = −3 mA VCC = Min, VIH = Min VIL = 0.5V, IOH = Max VOL LOW Level V CC = Min I OL = 12 mA 0.4 Output Voltage V IL = Max IOL = Max 0.5 V VIH = Min IOZH Off-State Output Current, V CC = Max VO = 2.7V 20 µA HIGH Level Voltage Applied VIL = Max IOZL Off-State Output Current, V IH = Min VO = 0.4V −200 µA LOW Level Voltage Applied II Input Current at Maximum V CC = Max A or B V I = 5.5V 0.1 mA Input Voltage DIR or G VI = 7V 0.1 IIH HIGH Level Input Current V CC = Max, VI = 2.7V 20 µA IIL LOW Level Input Current V CC = Max, VI = 0.4V −0.2 mA IOS Short Circuit Output Current VCC = Max (Note 3) −40 −225 mA ICC Supply Current Outputs HIGH VCC = Max 48 70 Outputs LOW 62 90 mA Outputs at Hi-Z 64 95 www.sycelectronica.com.ar

VCC = 5V, TA = 25°C Symbol Parameter Conditions Min Max Units tPLH Propagation Delay Time, C L = 45 pF 12 ns LOW-to-HIGH Level Output R L = 667Ω tPHL Propagation Delay Time, 12 ns HIGH-to-LOW Level Output tPZL Output Enable Time 40 ns to LOW Level tPZH Output Enable Time 40 ns to HIGH Level tPLZ Output Disable Time C L = 5 pF 25 ns from LOW Level R L = 667Ω tPHZ Output Disable Time 25 ns from HIGH Level tPLH Propagation Delay Time, C L = 150 pF 16 ns LOW-to-HIGH Level Output R L = 667Ω tPHL Propagation Delay Time, 17 ns HIGH-to-LOW Level Output tPZL Output Enable Time 45 ns to LOW Level tPZH Output Enable Time 45 ns to HIGH Level www.sycelectronica.com.ar

DM74LS245 3-STATE Octal Bus Transceiver Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N20A www.sycelectronica.com.ar