Details

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BUY 74HC595. https://www.utsource.net/itm/p/12608732.html

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Supply Voltage	VCC	2.0	-	6.0	V	-
Output High-Level Voltage	VOH	-	-	VCC - 0.5	V	IO = -1.0 mA
Output Low-Level Voltage	VOL	0.0	-	0.3	V	IO = 1.0 mA
Input High-Level Voltage	VIH	0.7VCC	-	VCC	V	-
Input Low-Level Voltage	VIL	0.0	-	0.3VCC	V	-
Storage Temperature Range	TSTG	-65	-	150	掳C	-
Operating Temperature Range	TA	-40	-	85	掳C	-
Output Current (Source)	IOH	-	1.0	15.0	mA	VOH = VCC - 0.5 V
Output Current (Sink)	IOL	-15.0	-1.0	-	mA	VOL = 0.3 V
Propagation Delay Time	tpd	0.0	60	150	ns	VCC = 5 V, f = 1 MHz
Setup Time	tsu	0.0	100	200	ns	VCC = 5 V
Hold Time	th	0.0	40	100	ns	VCC = 5 V
Clock Low to High Transition Time	tPLH	0.0	15	50	ns	VCC = 5 V
Clock High to Low Transition Time	tPHL	0.0	15	50	ns	VCC = 5 V

Instructions for Using 74HC595 Shift Register

1. Power Supply:

   • Connect V_CC to the positive power supply (2.0 V to 6.0 V).
   • Connect GND to the ground.

2. Serial Data Input (DS):

   • Connect the serial data input pin (DS) to the data source. This is where the data to be shifted into the register is provided.

3. Shift Register Clock (SH_CP):

   • Connect the shift register clock pin (SH_CP) to the clock signal. Each rising edge of this clock shifts the data one position in the register.

4. Storage Register Clock (ST_CP):

   • Connect the storage register clock pin (ST_CP) to the clock signal. Each rising edge of this clock transfers the data from the shift register to the storage register, which then appears on the output pins.

5. Output Enable (OE):

   • Connect the output enable pin (OE) to control the outputs. When OE is low, the outputs are active. When OE is high, the outputs are in a high-impedance state.

6. Master Reset (MR):

   • Connect the master reset pin (MR) to control the reset function. When MR is low, the shift register is cleared. When MR is high, the shift register operates normally.

7. Output Pins (Q0-Q7):

   • The output pins (Q0 to Q7) provide the data from the storage register. These can be connected to LEDs, transistors, or other digital circuits.

8. Serial Data Output (Q7S):

   • The serial data output pin (Q7S) provides the last bit shifted out of the register. This can be used to daisy-chain multiple 74HC595 chips.

Example Usage:

1. Initialize:

   • Set MR high to enable the shift register.
   • Set OE low to enable the outputs.

2. Shift Data:

   • Apply a series of clock pulses to SH_CP while providing data on DS.
   • For each rising edge of SH_CP, the data on DS is shifted into the register.

3. Store Data:

   • Apply a single rising edge to ST_CP to transfer the data from the shift register to the storage register.

4. Read Outputs:

   • The data will now appear on the output pins Q0 to Q7.

Notes:

• Ensure that the supply voltage and current ratings are not exceeded.
• Use appropriate decoupling capacitors near the power supply pins to reduce noise.
• When daisy-chaining multiple 74HC595 chips, connect the Q7S of one chip to the DS of the next chip.

(For reference only)