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CD74HC194 Datasheet(PDF) 1 Page - Texas Instruments |
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CD74HC194 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 8 page 1 Data sheet acquired from Harris Semiconductor SCHS164 Features • Four Operating Modes - Shift Right, Shift Left, Hold and Reset • Synchronous Parallel or Serial Operation • Typical fMAX = 60MHz at VCC = 5V, CL = 15pF, TA = 25 oC • Asynchronous Master Reset • Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads • Wide Operating Temperature Range . . . -55oC to 125oC • Balanced Propagation Delay and Transition Times • Significant Power Reduction Compared to LSTTL Logic ICs • HC Types - 2V to 6V Operation - High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V • HCT Types - 4.5V to 5.5V Operation - Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min) - CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH Description The Harris CD74HC194 and CD74HCT194 are 4-bit shift registers with Asynchronous Master Reset (MR). In the par- allel mode (S0 and S1 are high), data is loaded into the associated flip-flop and appears at the output after the posi- tive transition of the clock input (CP). During parallel loading serial data flow is inhibited. Shift left and shift right are accomplished synchronously on the positive clock edge with serial data entered at the shift left (DSL) serial input for the shift right mode, and at the shift right (DSR) serial input for the shift left mode. Clearing the register is accomplished by a Low applied to the Master Reset (MR) pin. Pinout CD74HC194, CD74HCT194 (PDIP, SOIC) TOP VIEW Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. CD74HC194E -55 to 125 16 Ld PDIP E16.3 CD74HCT194E -55 to 125 16 Ld PDIP E16.3 CD74HC194M -55 to 125 16 Ld SOIC M16.15 NOTES: 1. When ordering, use the entire part number. Add the suffix 96 to obtain the variant in the tape and reel. 2. Die for this part number is available which meets all electrical specifications. Please contact your local sales office or Harris customer service for ordering information. 14 15 16 9 13 12 11 10 1 2 3 4 5 7 6 8 MR DSR D0 D1 D2 D3 GND DSL VCC Q1 Q2 Q3 CP S1 S0 Q0 September 1997 CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. Copyright © Harris Corporation 1997 CD74HC194, CD74HCT194 High-Speed CMOS Logic 4-Bit Bidirectional Universal Shift Register File Number 1668.1 [ /Title (CD74 HC194, CD74H CT194) /Sub- ject (High- Speed CMOS Logic 4-Bit |
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