74HCT165 Datasheet | NXP Semiconductors

74HC165; 74HCT165 8-bit parallel-in/serial out shift register Rev. 03 - 14 March 2008 Product data sheet 1. General description The 74HC165; 74HCT165 are high-speed Si-gate CMOS devices that ply with JEDEC standard no. 7A. They are pin patible with Low-power Schottky TTL (LSTTL). The 74HC165; 74HCT165 are 8-bit parallel-load or serial-in shift registers with plementary serial outputs (Q7 and Q7) available from the last stage. When the parallel load (PL) input is LOW, parallel data from the D0 to D7 inputs are loaded into the register asynchronously. When PL is HIGH, data enters the register serially at the DS input and shifts one place to the right (Q0 → Q1 → Q2, etc.) with each positive-going clock transition. This feature allows parallel-to-serial converter expansion by tying the Q7 output to the DS input of the succeeding stage. The clock input is a gated-OR structure which allows one input to be used as an active LOW clock enable (CE) input. The pin assignment for the CP and CE inputs is arbitrary and can be reversed for layout convenience. The LOW-to-HIGH transition of input CE should only take place while CP HIGH for predictable operation. Either the CP or the CE should be HIGH before the LOW-to-HIGH transition of PL to prevent shifting the data when PL is activated. 2. Features I Asynchronous 8-bit parallel load I Synchronous serial input I plies with JEDEC standard no. 7A I ESD protection: N HBM JESD22-A114E exceeds 2000 V N MM JESD22-A115-A exceeds 200 V I Specified from - 40 °C to +85 °C and from - 40 °C to +125 °C 3. Applications I Parallel-to-serial data conversion NXP Semiconductors 74HC165; 74HCT165 8-bit parallel-in/serial out shift register 4. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version 74HC165N - 40 °C to +125 °C DIP16 plastic dual in-line package; 16 leads (300 mil) SOT38-4 74HCT165N...