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SN54LS293J Datasheet(PDF) 1 Page - ON Semiconductor |
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SN54LS293J Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 5 page 5-1 FAST AND LS TTL DATA DECADE COUNTER; 4-BIT BINARY COUNTER The SN54 / 74LS290 and SN54 / 74LS293 are high-speed 4-bit ripple type counters partitioned into two sections. Each counter has a divide-by-two sec- tion and either a divide-by-five (LS290) or divide-by-eight (LS293) section which are triggered by a HIGH-to-LOW transition on the clock inputs. Each section can be used separately or tied together (Q to CP)to form BCD, Bi-quinary, or Modulo-16 counters. Both of the counters have a 2-input gated Master Reset (Clear), and the LS290 also has a 2-input gated Master Set (Preset 9). • Corner Power Pin Versions of the LS90 and LS93 • Low Power Consumption . . . Typically 45 mW • High Count Rates . . . Typically 42 MHz • Choice of Counting Modes . . . BCD, Bi-Quinary, Binary • Input Clamp Diodes Limit High Speed Termination Effects 14 13 12 11 10 9 12 3456 8 7 VCC MR MR CP1 CP0 Q0 Q3 MS NC MS Q2 Q1 NC GND CONNECTION DIAGRAM DIP (TOP VIEW) LS290 LS293 NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. 14 13 12 11 10 9 1234 56 8 7 VCC MR MR CP1 CP0 Q0 Q3 NC NC NC Q2 Q1 NC GND PIN NAMES LOADING (Note a) HIGH LOW CP0 Clock (Active LOW going edge) Input to ÷2 Section. 0.05 U.L. 1.5 U.L. CP1 Clock (Active LOW going edge) Input to ÷5 Section (LS290). 0.05 U.L. 2.0 U.L. CP1 Clock (Active LOW going edge) Input to ÷8 Section (LS293). 0.05 U.L. 1.0 U.L. MR1, MR2 Master Reset (Clear) Inputs 0.5 U.L. 0.25 U.L. MS1, MS2 Master Set (Preset-9, LS290) Inputs 0.5 U.L. 0.25 U.L. Q0 Output from ÷2 Section (Notes b & c) 10 U.L. 5 (2.5) U.L. Q1, Q2, Q3 Outputs from ÷5 & ÷8 Sections (Note b) 10 U.L. 5 (2.5) U.L. NOTES: a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW. b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74) Temperature Ranges. c) The Q0 Outputs are guaranteed to drive the full fan-out plus the CP1 Input of the device. SN54/74LS290 SN54/74LS293 DECADE COUNTER; 4-BIT BINARY COUNTER LOW POWER SCHOTTKY ORDERING INFORMATION SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXD SOIC J SUFFIX CERAMIC CASE 632-08 N SUFFIX PLASTIC CASE 646-06 14 1 14 1 14 1 D SUFFIX SOIC CASE 751A-02 |
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