SN74AHCT594PWR - Electronic component TEXAS INSTRUMENTS - Free user manual and instructions
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| Product Type | 8-bit Shift Register with Storage Register |
| Manufacturer | Texas Instruments |
| Model | SN74AHCT594PWR |
| Family | 74AHCT (Advanced High-Speed CMOS) |
| Package Type | TSSOP-16 |
| Number of Pins | 16 |
| Supply Voltage | 4.5V to 5.5V |
| Output Type | 3-state |
| Logic Compatibility | TTL-compatible inputs |
| Propagation Delay | Typical 7 ns at 5V |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -65°C to +150°C |
| Dimensions (L x W x H) | 5.0 mm x 4.4 mm x 1.2 mm |
| Weight | 0.07 g approx. |
| Mounting Type | Surface Mount |
| RoHS Compliant | Yes |
| Lead-Free | Yes |
| ESD Protection | 2000V HBM |
| Maintenance | No regular maintenance required |
| Cleaning | Gently wipe with dry cloth or isopropyl alcohol |
| Safety Precautions | Protect from static discharge; do not exceed maximum ratings |
| Spare Parts / Repairability | Not repairable; replace component if defective |
| Applications | LED displays, parallel I/O expansion, general purpose shift registers |
Frequently Asked Questions - SN74AHCT594PWR TEXAS INSTRUMENTS
What is the SN74AHCT594PWR?
The SN74AHCT594PWR is a 8-bit shift register with a storage register, featuring serial-in, parallel-out operation. It is part of Texas Instruments' 74AHCT family of high-speed CMOS devices.
What is the supply voltage range?
The device operates with a supply voltage (VCC) between 4.5V and 5.5V, making it suitable for standard 5V digital systems. It is TTL-compatible, so it can interface with legacy logic.
What do the SRCLK and RCLK pins do?
SRCLK (shift register clock) shifts data on each rising edge. RCLK (storage register clock) transfers the contents of the shift register to the output latches, also on a rising edge. Together they separate shifting from output updating.
How does the clear pin (SRCLR) work?
SRCLR is an active-low input that clears the shift register cells when pulled low. The storage register is not cleared directly; it must be loaded with zeros by applying a rising edge to RCLK after the shift register has been cleared.
What is the purpose of the output enable (OE) pin?
The OE pin controls the 3-state outputs. When OE is high, the outputs enter a high-impedance state, allowing multiple devices to share a bus. When OE is low, the outputs present the data stored in the storage register.
How should this IC be handled during assembly?
As a CMOS device, it requires ESD precautions. Use grounded wrist straps, anti-static mats, and avoid touching the pins directly. Store it in anti-static packaging until ready to solder.
Can multiple SN74AHCT594PWR chips be cascaded?
Yes, you can daisy-chain them by connecting the serial output of one device to the SER input of the next. This allows just two control lines (SRCLK and RCLK) to drive an unlimited number of output pins.
What is the package type and dimensions?
The component comes in a TSSOP-16 (Thin Shrink Small Outline Package) with 16 pins. Its dimensions are approximately 5.0 mm x 4.4 mm x 1.2 mm, suitable for high-density surface mount boards.
What is the quiescent current consumption?
The quiescent supply current (ICC) is typically very low, around 4 µA. Actual current increases with switching frequency and capacitive load, but the device is designed for efficient operation.
Can this IC be replaced by a similar model?
Yes, compatible alternatives include the 74HC594 or 74HCT594 if the voltage levels are suitable. Always verify the pinout and timing specifications before substituting to ensure proper operation.
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Brand : TEXAS INSTRUMENTS
Model : SN74AHCT594PWR
Category : Electronic component