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74HCT7731N Datenblatt(PDF) 2 Page - NXP Semiconductors |
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74HCT7731N Datenblatt(HTML) 2 Page - NXP Semiconductors |
2 / 8 page September 1993 2 Philips Semiconductors Product specification Quad 64-bit static shift register 74HC/HCT7731 FEATURES • Frequency range DC to 100 MHz. • Separate serial data inputs • Cascadable • Functionally compatible with HEF 4731 • Includes recycling mode • Direct shift out • Output capability: Standard • ICC category: LSI. APPLICATIONS • Data storage • Delay line. GENERAL DESCRIPTION The HC/HCT7731 are high-speed Si-gate CMOS devices. They are specified in compliance with JEDEC standard no. 7A. The HC/HCT7731 are quad 64-bit static shift registers with a recycling mode. Each register has separate data inputs Da to Dd, clock inputs CPa to CPd and data outputs Qa to Qd. Data shifts one place towards the output, each LOW to HIGH transition of the clock pulse. Each recycling mode input controls two registers RECab for registers A and B and RECcd for registers C and D. When the REC input is HIGH, the device is in the recycling mode and data at the output is shifted back into the input of the register, so after 64 clock pulses the contents of a register is again in its original position. This enables the user to tap off data from any position. When the REC input is LOW external data can be shifted in. QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns. Notes 1. CPD is used to determine the dynamic power dissipation (PD in µW): PD = (CPD x VCC2 x fi) + (CL + VCC2 x fo) + (Ipull-up x VCC) where: fi = input frequency in MHz. fo = output frequency in MHz. VCC = supply voltage in V. CL = output load capacitance in pF. Ipull-up = pull-up currents in µA. 2. For HC the condition is VI = GND to VCC For HCT the condition is VI = GND to VCC − 1.5 V. 3. See also power dissipation information. ORDERING INFORMATION SYMBOL PARAMETER CONDITIONS TYP. UNIT HC HCT tPHL/tPLH propagation delay CPa-d to Qa-d CL = 15 pF; VCC = 5 V 15 20 ns fmax maximum clock frequency 100 100 MHz CI input capacitance 3.5 3.5 pF CPD power dissipation capacitance per register notes 1, 2 and 3 58 61 pF EXTENDED TYPE NUMBER PACKAGE PINS PIN POSITION MATERIAL CODE 74HC/HCT7731N 16 DIL plastic SOT38Z 74HC/HCT7731D 16 SO16 plastic SOT109A |
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