HD74LS293 4-bit Binary Counter REJ03D0477–0300 Rev.3.00 Jul.15.2005 This counter contains four master-slave flip-flops and additional gating to provide a divide-by-two counter and divideby-eight counter. This counter has a gated zero reset. To use the maximum count length of this counter, the B input is connected to the QA output. The input count pulses are applied to input A and the outputs are as described in the appropriate function table. Features • Ordering Information Part Name Package Type Package Code (Previous Code) Package Abbreviation Taping Abbreviation (Quantity) HD74LS293P DILP-14 pin PRDP0014AB-B (DP-14AV) P — Pin Arrangement NC 1 NC 2 NC 3 QC 4 QB 5 NC 6 GND 7 14 VCC R0(2) 13 R0(2) R0(1) 12 R0(1) QC B 11 B QB A 10 A QA 9 QA 8 QD Outputs Inputs QD Outputs (Top view) Function Table Reset / Count Reset Input Outputs R0 (1) R0 (2) QD QC QB QA H L X H X L L L L L Rev.3.00, Jul.15.2005, page 1 of 7 Count Count HD74LS293 BCD Count Sequence Count 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Outputs QD L L L L L L L L H H H H H H H H QC L L L L H H H H L L L L H H H H QB L L H H L L H H L L H H L L H H Notes: 1. H; high level, L; low level, X; irrelevant 2. Output QA is connected to input B. Block Diagram J Input A Q QA Q QB Q QC Q QD CK K J Input B CK K J CK K J CK R0(1) R0(2) Rev.3.00, Jul.15.2005, page 2 of 7 K QA L H L H L H L H L H L H L H L H HD74LS293 Absolute Maximum Ratings Item Symbol Ratings Unit VCC 7 V Supply voltage RO Inputs Input voltage VIN A, B Inputs Power dissipation 7 V 5.5 V PT 400 mW Operating temperature Topr –20 to +75 °C Storage temperature Tstg –65 to +150 °C Note: Voltage value, unless otherwise noted, are with respect to network ground terminal. Recommended Operating Conditions Item Supply voltage Output current Pulse width Min Typ Max Unit VCC 4.75 5.00 5.25 V IOH — — –400 µA IOL — — 8 mA Topr –20 25 75 °C ƒcount 0 — 32 0 — 16 A input 15 — — B input 30 — — 15 — — 25 — — Operating temperature Count frequency Symbol A input B input tw Reset inputs Setup time tsu MHz ns ns Electrical Characteristics (Ta = –20 to +75 °C) Item Input voltage Symbol VIH VIL min. 2.0 — typ.* — — max. — 0.8 Unit V V VOH 2.7 — — V VOL — — — — 0.4 0.5 V IIH — — — — 20 40 µA VCC = 5.25 V, VI = 2.7 V IIL — — — — — — 40 –0.4 –2.4 mA VCC = 5.25 V, VI = 0.4 V II — — — — — — –1.6 0.1 0.2 mA Output voltage Input current Any Reset A input B input Any Reset A input B input Any Reset A input Condition VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V, IOH = –400 µA IOL = 4 mA** VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V IOL = 8 mA** VI = 7 V VI = 5.5 V VCC = 5.25 V — — 0.2 B input Short-circuit output current IOS –20 — –100 mA VCC = 5.25 V Supply current*** ICC — 9 15 mA VCC = 5.25 V Input clamp voltage VIK — — –1.5 V VCC = 4.75 V, IIN = –18 mA Notes: * VCC = 5 V, Ta = 25°C ** QA output is tested at specified IOL plus the limit value of IIL for the B input. This permits driving the B input while maintaining full fan-out capability. *** ICC is measured with all outputs open, both R0 inputs grounded following momentary connection to 4.5 V, and all other inputs grounded. Rev.3.00, Jul.15.2005, page 3 of 7 HD74LS293 Switching Characteristics (VCC = 5 V, Ta = 25°C) Item Symbol Maximum count frequency ƒmax Propagation delay time Inputs A B Outputs QA QB A QA A QD B QB B QC B QD Set-to-0 QA to QD tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPHL min. 32 16 — — — — — — — — — — typ. 42 — 10 12 46 46 10 14 21 23 34 34 max. — — 16 18 70 70 16 21 32 35 51 51 — 26 40 Unit Condition MHz ns ns CL = 15 pF, RL = 2 kΩ ns ns ns ns Timing Method tw 3V R0 1.3 V 1.3 V 0V tsu 3V A or B Input 1.3 V tw Rev.3.00, Jul.15.2005, page 4 of 7 1.3 V 0V HD74LS293 Testing Method Test Circuit VCC QA 4.5V RL Load circuit 1 QA A CL P.G. Zout = 50Ω See Testing Table B QB QB R0(1) R0(2) QC Same as Load Circuit 1. QD QD Notes: Same as Load Circuit 1. QC Same as Load Circuit 1. 1. CL includes probe and jig capacitance. 2. All diodes are 1S2074(H). Testing Table Item From input to output Inputs A B Outputs R0 A→Q IN to QA GND ƒmax B→Q 4.5V IN GND A→QA IN to QA GND A→QD IN to QA GND tPLH B→QB 4.5V IN GND tPHL B→QC 4.5V IN GND B→QD 4.5V IN GND R0→Q** IN* to QA IN Notes: * For initialized. ** Measured with each input and unused inputs at 4.5 V. Rev.3.00, Jul.15.2005, page 5 of 7 QA QB QC QD OUT — OUT — — — — OUT OUT OUT — — OUT — — OUT OUT OUT — — — OUT — OUT OUT OUT — OUT — — OUT OUT HD74LS293 Waveforms 1 ƒmax, tPLH, tPHL, (Clock→Q) tTHL tTLH 3V 90% 90% 1.3 V Clock 10% 1.3 V 10% 0V tPHL(Measure at tn+2) tPLH (Measure at tn+1) VOH QA 1.3 V 1.3 V VOL tPHL (Measure at tn+4) tPLH (Measure at tn+2) VOH QB 1.3 V 1.3 V tPHL (Measure at tn+8) VOL tPLH (Measure at tn+4) VOH QC 1.3 V 1.3 V VOL tPHL (Measure at tn+16) tPLH (Measure at tn+8) VOH QD 1.3 V 1.3 V VOL Notes: 1. Clock input pulse; tTLH ≤ 15 ns, tTHL ≤ 6 ns, PRR = 1 MHz, duty cycle = 50% and : for ƒmax, tTLH = tTHL ≤ 2.5 ns. 2. tn is reference bit time when all outputs are low. Waveforms 2 tPHL, (R0→Q) tTLH tTHL 3V 90% 90% 1.3 V 1.3 V R0 10% 10% tw ≥ 15ns 0V tPHL VOH QA to QD Note: tTLH ≤ 15 ns, tTHL ≤ 5 ns Rev.3.00, Jul.15.2005, page 6 of 7 1.3 V VOL HD74LS293 Package Dimensions JEITA Package Code P-DIP14-6.3x19.2-2.54 RENESAS Code PRDP0014AB-B MASS[Typ.] 0.97g Previous Code DP-14AV D 8 E 14 1 7 b3 Z A1 A Reference Symbol bp θ c e1 7.62 D 19.2 E 6.3 A1 0.51 bp 0.40 20.32 7.4 0.48 0.56 1.30 b3 c 0.19 θ 0° e 2.29 L Max 5.06 Z ( Ni/Pd/Au plating ) Rev.3.00, Jul.15.2005, page 7 of 7 Nom e1 A L e Dimension in Millimeters Min 0.25 0.31 2.54 2.79 15° 2.39 2.54 Sales Strategic Planning Div. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Keep safety first in your circuit designs! 1. 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