74VHC595FT ,74VHC CMOS logic IC seriesFunctional Description• 8-Bit Shift Register/Latch (3-state)2. 2. General General2. 2. General Gene ..
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74VHC595FT
74VHC CMOS logic IC series
74VHC595FT
CMOS Digital Integrated Circuits Silicon Monolithic
74VHC595FT74VHC595FT74VHC595FT74VHC595FT
1. 1. 1. 1. Functional DescriptionFunctional DescriptionFunctional DescriptionFunctional Description 8-Bit Shift Register/Latch (3-state)
2. 2. 2. 2. GeneralGeneralGeneralGeneral
The 74VHC595FT is an advanced high speed 8-BIT SHIFT REGISTER/LATCH fabricated with silicon gate
C2MOS technology.
It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS
low power dissipation.
The 74VHC595FT contains an 8-bit static shift register which feeds an 8-bit storage register.
Shift operation is accomplished on the positive going transition of the SCK input. The output register is loaded
with the contents of the shift register on the positive going transition of the RCK input.
Since RCK and SCK signal are independent, parallel outputs can be held stable during the shift operation. And,
since the parallel outputs are 3-state, it can be directly connected to 8-bit bus. This register can be used in serial-
to-parallel conversion, data receivers, etc.
An input protection circuit ensures that 0 to 5.5 V can be applied to the input pins without regard to the supply
voltage. This device can be used to interface 5 V to 3 V systems and two supply systems
such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages.
3. 3. 3. 3. FeaturesFeaturesFeaturesFeatures
(1) High speed: fMAX = 185 MHz (typ.) at VCC = 5 V
(2) Low power dissipation: ICC = 4 µA (max) at Ta = 25
(3) High noise immunity: VNIH = VNIL = 28% VCC (min)
(4) Power-down protection is provided on all inputs.
(5) Balanced propagation delays: tPLH ≈ tPHL
(6) Wide operating voltage range: VCC(opr) = 2 V to 5.5 V
(7) Low noise: VOLP = 1.0 V (max)
(8) Pin and function compatible with the 74 serise (74AC/HC/AHC/LV etc.) 595 type.
4. 4. 4. 4. PackagingPackagingPackagingPackaging
