74hc595 arduino datasheet - The 74HC/HCT595 are high-speed Si-gate CMOS devicesand are pin compatible with low power Schottky TTL(LSTTL). They are specified in compliance with JEDEC standard no. 7A.The “595” is an 8-stage serial shift register with a storage register and 3-state outputs.
The shift register and storage register have separate clocks. Data is shifted on the positive-going transitions of the SHCP input.
The data in each register is transferred to the storage register on a positive-going 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.
The shift register has a serial input (DS) and a serial standard output (Q7’) for cascading. It is also provided with a synchronous reset (active LOW) for all 8 shift register stages.
The storage register has 8 parallel 3-state bus driver outputs. Data in the storage register appears at the output whenever the output enable input (OE) is LOW.
Features:
The total contact time of successive solder waves must not exceed 5 seconds. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg max).
If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit.
If the bit temperature is between 300 and 400°C, contact may be up to 5 seconds.
Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 50 and 300 seconds depending on heating method.
Typical reflow temperatures range from 215 to 250°C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at45°C.
If wave soldering is used -and cannot be avoided for SSOP and TSSOP packages - the following conditions must be observed:
You can download 74hc595 Arduino Datasheet here.
The shift register and storage register have separate clocks. Data is shifted on the positive-going transitions of the SHCP input.
The data in each register is transferred to the storage register on a positive-going 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.
The shift register has a serial input (DS) and a serial standard output (Q7’) for cascading. It is also provided with a synchronous reset (active LOW) for all 8 shift register stages.
The storage register has 8 parallel 3-state bus driver outputs. Data in the storage register appears at the output whenever the output enable input (OE) is LOW.
8-bit Serial-in/serial or Parallel-out Shiftregister with Output Latches; 3-State
Features:
- 8-bit serial input
- 8-bit serial or parallel output
- Storage register with 3-state outputs
- Shift register with direct clear
- 100 MHz (typ) shift out frequency
- Output capability:
- parallel outputs; bus driver
- serial output; standard
- ICC category: MSI.APPLICATIONS
- Serial-to-parallel data conversion
- Remote control holding register.
74hc595 Arduino: Soldering By Dipping or by Wave
The maximum permissible temperature of the solder is 260°C; solder at this temperature must not be in contact with the joint for more than 5 seconds.The total contact time of successive solder waves must not exceed 5 seconds. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg max).
If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit.
74hc595 Arduino: Repairing Soldering Joints
Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300°C it may remain in contact for up to 10 seconds.If the bit temperature is between 300 and 400°C, contact may be up to 5 seconds.
74hc595 Arduino: Reflow Soldering
Reflow soldering techniques are suitable for all SO, SSOP and TSSOP packages. Reflow soldering requires solder paste (a suspension offine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling orpressure-syringe dispensing before package placement.Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 50 and 300 seconds depending on heating method.
Typical reflow temperatures range from 215 to 250°C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at45°C.
74hc595 Arduino: Wave Soldering
Wave soldering can be used for all SO packages. Wave soldering is not recommended for SSOP and TSSOP packages, because of the likelihood of solder bridging dueto closely-spaced leads and the possibility of incomplete solder penetration in multi-lead devices.If wave soldering is used -and cannot be avoided for SSOP and TSSOP packages - the following conditions must be observed:
- A double-wave (a turbulent wave with high upwardpressure followed by a smooth laminar wave) soldering technique should be used.
- The longitudinal axis of the package footprint must be parallel to the solder flow and must incorporate solderthieves at the downstream end.
The Shift Register: Explained (74HC595)
This video explains some of the shift register fundamentals.You can download 74hc595 Arduino Datasheet here.
Comments
Post a Comment