M74HC294 PROGRAMMABLE DIVIDER/TIMER ■ ■ ■ ■ ■ ■ ■ HIGH SPEED : fMAX = 75 MHz (TYP.) at VCC = 6V LOW POWER DISSIPATION: ICC =4µA(MAX.) at TA=25°C HIGH NOISE IMMUNITY: VNIH = V NIL = 28 % VCC (MIN.) SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN) BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL WIDE OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 294 DESCRIPTION The M74HC294 is an high speed CMOS PROGRAMMABLE DIVIDER/TIMER fabricated with silicon gate C2MOS technology. This device is a programmable frequency divider and has two clock inputs, either one may be used for clock gating. (see the function table). The M74HC294 can divide from 22 to 215. This device feature an active-low clear input to initialize DIP SOP TSSOP ORDER CODES PACKAGE TUBE DIP SOP TSSOP M74HC294B1R M74HC294M1R T&R M74HC294RM13TR M74HC294TTR the state of all flip-flops. To facilitate incoming inspection, test points (TP) are provided. All inputs are equipped with protection circuits against static discharge and transient excess voltage. This device has Q output with "Totem Pole" configuration and test point TP with "Open Drain" output configuration. PIN CONNECTION AND IEC LOGIC SYMBOLS August 2001 1/11 M74HC294 INPUT AND OUTPUT EQUIVALENT CIRCUIT (TOTEM POLE OUTPUT) INPUT AND OUTPUT EQUIVALENT CIRCUIT (OPEN DRAIN OUTPUT) PIN DESCRIPTION PIN No SYMBOL 4, 5 1, 2, 14, 15 3 11 7 8 16 CLK1, CLK2 A to E TP CLR Q GND Vcc NAME AND FUNCTION Input Clock Program Inputs Test Point Outputs Clear (Active LOW) Output Ground (0V) Positive Supply Voltage TRUTH TABLE CLR CLK1 CLK2 Q OUTPUT MODE L X X CLEARED TO L H 2/11 L H L H H H X X H UP COUNT NO CHANGE M74HC294 LOGIC DIAGRAM This logic diagram has not be used to estimate propagation delays 3/11 M74HC294 FUNCTIONAL TABLE FREQUENCY DIVISION PROGRAMMING INPUTS Q TP D C B A BINARY L L L L L L L H Inhibit Inhibit DECIMAL BINARY DECIMAL L L H L 22 4 29 512 29 512 9 Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit L L H H 23 L H L L 4 2 16 2 512 L H L H 25 32 29 512 L 6 2 9 512 128 Disabled Low L H H 8 64 2 L H H H 27 H L L L 28 256 22 4 H 9 512 23 8 4 16 5 H L L 2 10 H L H L H L H H 2 2.048 2 32 H H L L 212 4.096 26 64 128 2 11 1.024 2 H H L H 213 8.192 27 H H H L 214 16.384 28 256 H H H H 215 32.768 29 512 ABSOLUTE MAXIMUM RATINGS Symbol VCC Parameter Supply Voltage Value Unit -0.5 to +7 V -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 V DC Input Diode Current ± 20 mA IOK DC Output Diode Current ± 20 mA IO DC Output Current ± 25 mA ± 50 mA VI DC Input Voltage VO DC Output Voltage IIK ICC or IGND DC VCC or Ground Current PD Power Dissipation Tstg Storage Temperature TL Lead Temperature (10 sec) V 500(*) mW -65 to +150 °C 300 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied (*) 500mW at 65 °C; derate to 300mW by 10mW/°C from 65°C to 85°C 4/11 M74HC294 RECOMMENDED OPERATING CONDITIONS Symbol VCC Parameter Value Supply Voltage VI Input Voltage VO Output Voltage Top Operating Temperature Input Rise and Fall Time tr, tf Unit 2 to 6 V 0 to VCC V 0 to VCC V -55 to 125 °C VCC = 2.0V 0 to 1000 ns VCC = 4.5V 0 to 500 ns VCC = 6.0V 0 to 400 ns DC SPECIFICATIONS Test Condition Symbol VIH VIL VOH VOL VOL II ICC Parameter High Level Input Voltage Low Level Input Voltage High Level Output Voltage (Q) Low Level Output Voltage (Q) Low Level Output Voltage (TP) Input Leakage Current Quiescent Supply Current Value TA = 25°C VCC (V) Min. 2.0 4.5 6.0 2.0 4.5 6.0 Typ. Max. 1.5 3.15 4.2 -40 to 85°C -55 to 125°C Min. Min. Max. 1.5 3.15 4.2 0.5 1.35 1.8 Max. 1.5 3.15 4.2 0.5 1.35 1.8 V 0.5 1.35 1.8 2.0 IO=-20 µA 1.9 2.0 1.9 1.9 4.5 IO=-20 µA 4.4 4.5 4.4 4.4 6.0 IO=-20 µA 5.9 6.0 5.9 5.9 4.5 IO=-4.0 mA 4.18 4.31 4.13 4.10 6.0 IO=-5.2 mA 5.68 2.0 IO=20 µA 0.0 0.1 0.1 0.1 4.5 IO=20 µA 0.0 0.1 0.1 0.1 6.0 IO=20 µA 0.0 0.1 0.1 0.1 4.5 IO=4.0 mA 0.17 0.26 0.33 0.40 6.0 IO=5.2 mA 0.18 0.26 0.33 0.40 2.0 IO=20 µA 0.0 0.1 0.1 0.1 4.5 IO=20 µA 0.0 0.1 0.1 0.1 5.8 5.63 Unit V V 5.60 V 6.0 IO=20 µA 0.0 0.1 0.1 0.1 4.5 IO=1.0 mA 0.17 0.26 0.33 0.40 6.0 IO=1.3 mA 0.18 0.26 0.33 0.40 6.0 VI = VCC or GND ± 0.1 ±1 ±1 µA 6.0 VI = VCC or GND 4 40 80 µA V 5/11 M74HC294 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns) Test Condition Symbol Parameter tTLH tTHL Output Transition Time (Q) tTLH tTHL Output Transition Time (TP) tPLH tPHL Propagation Delay Time (CLK - Q) tPHL fMAX Propagation Delay Time (CLR - Q) Maximum Clock Frequency tW(L) tW(H) Minimum Pulse Width (CLK) tW(L) Minimum Pulse Width (CLR) tREM Minimum Removal Time Value TA = 25°C VCC (V) Min. 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 6.0 32 38 Typ. Max. 30 8 7 116 29 25 145 43 37 110 34 29 20 64 75 40 8 7 40 10 9 75 15 13 225 45 38 330 66 56 260 52 44 -40 to 85°C -55 to 125°C Min. Min. Max. 95 19 16 280 56 48 415 83 71 325 65 55 5 26 31 75 15 13 100 20 17 0 0 0 Max. 110 22 19 340 68 57 15 84 390 78 66 4 21 25 95 19 16 125 25 21 0 0 0 Unit ns ns ns ns MHz 110 22 20 150 30 26 0 0 0 ns ns ns CAPACITIVE CHARACTERISTICS Test Condition Symbol Parameter VCC (V) Value TA = 25°C Typ. Max. CIN Input Capacitance 5.0 Min. 5 10 CPD Power Dissipation Capacitance (note 1) 5.0 23 -40 to 85°C -55 to 125°C Min. Min. Max. 10 Unit Max. 10 pF pF 1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC 6/11 M74HC294 TEST CIRCUIT CL = 50pF or equivalent (includes jig and probe capacitance) RT = ZOUT of pulse generator (typically 50Ω) SWITCHING CHARACTERISTICS TEST WAVEFORM : (f=1MHz; 50% duty cycle) 7/11 M74HC294 Plastic DIP-16 (0.25) MECHANICAL DATA mm. inch DIM. MIN. a1 0.51 B 0.77 TYP MAX. MIN. TYP. MAX. 0.020 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 17.78 0.700 F 7.1 0.280 I 5.1 0.201 L Z 3.3 0.130 1.27 0.050 P001C 8/11 M74HC294 SO-16 MECHANICAL DATA DIM. mm. MIN. TYP A a1 inch MAX. MIN. TYP. 1.75 0.1 0.068 0.2 a2 MAX. 0.003 0.007 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 c1 45° (typ.) D 9.8 10 0.385 0.393 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 8.89 0.350 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M S 0.62 0.024 8° (max.) PO13H 9/11 M74HC294 TSSOP16 MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. MAX. 1.2 A1 0.05 A2 0.8 b 0.047 0.15 0.002 0.004 0.006 1.05 0.031 0.039 0.041 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 D 4.9 5 5.1 0.193 0.197 0.201 E 6.2 6.4 6.6 0.244 0.252 0.260 E1 4.3 4.4 4.48 0.169 0.173 0.176 1 e 0.65 BSC K 0° L 0.45 A 0.60 0.0256 BSC 8° 0° 0.75 0.018 8° 0.024 0.030 A2 A1 b e K c L E D E1 PIN 1 IDENTIFICATION 1 0080338D 10/11 M74HC294 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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