74HC594DB,112 Nexperia

74HC594 74HCT594 8-bit shift register with output register Rev. 6 22 October 2021 Product data sheet 1. General description The 74HC594 74HCT594 is an 8-bit serial-in/serial or parallel-out shift register with a storage register. Separate clock and reset inputs are provided on both shift and storage registers. The device features a serial input (DS) and a serial output (Q7S) to enable cascading. Data is shifted on the LOW-to-HIGH transitions of the SHCP input, and the data in the shift register is transferred to the storage register on a LOW-to-HIGH transition of the STCP input. If both clocks are connected together, the shift register will always be one clock pulse ahead of the storage register. A LOW level on one of the two register reset pins (SHR and STR) will clear the corresponding register. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of V . CC 2. Features and benefits Synchronous serial input and output 8-bit parallel output Shift and storage registers have independent direct clear and clocks Independent clocks for shift and storage registers 100 MHz (typical) Wide supply voltage range from 2.0 V to 6.0 V CMOS low power dissipation High noise immunity Latch-up performance exceeds 100 mA per JESD 78 Class II Level B Input levels: For 74HC594: CMOS level For 74HCT594: TTL level Complies with JEDEC standards JESD8C (2.7 V to 3.6 V) JESD7A (2.0 V to 6.0 V) ESD protection: HBM JESD22-A114F exceeds 2000 V MM JESD22-A115-A exceeds 200 V (C = 200 pF, R = 0 ) Multiple package options Specified from -40 C to +85 C and from -40 C to +125 C 3. Applications Serial-to parallel data conversion Remote control holding registerNexperia 74HC594 74HCT594 8-bit shift register with output register 4. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version 74HC594D -40 C to +125 C SO16 plastic small outline package 16 leads SOT109-1 body width 3.9 mm 74HCT594D 74HC594DB -40 C to +125 C SSOP16 plastic shrink small outline package 16 leads SOT338-1 body width 5.3 mm 74HCT594DB 74HC594PW -40 C to +125 C TSSOP16 plastic thin shrink small outline package 16 leads SOT403-1 body width 4.4 mm 74HCT594PW 5. Functional diagram 14 DS 11 SHCP 8-STAGE SHIFT REGISTER 10 SHR 9 Q7S 12 STCP 8-BIT STORAGE REGISTER 13 STR 15 1 2 3 4 5 6 7 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 mbc320 Fig. 1. Functional diagram SHCP STCP 13 STR R2 12 11 12 STCP C2 10 9 Q7S SHR R1 SRG8 11 15 Q0 SHCP C1/ Q1 1 14 15 DS 1D 2D Q0 Q2 2 1 Q1 DS 14 3 Q3 2 Q2 3 4 Q4 Q3 4 5 Q5 Q4 5 6 Q6 Q5 6 Q6 7 Q7 7 Q7 10 13 9 Q7S SHR STR mbc319 mbc322 Fig. 2. Logic symbol Fig. 3. IEC logic symbol 74HC HCT594 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2021. All rights reserved Product data sheet Rev. 6 22 October 2021 2 / 21