74VHC594 datasheet(1/14 Pages) STMICROELECTRONICS

Teilenummer	74VHC594

Bauteilbeschribung	8 BIT SHIFT REGISTER WITH OUTPUT REGISTER

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November 2004

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HIGH SPEED: tPD = 4.2ns (TYP.) at VCC = 5V

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LOW POWER DISSIPATION:

ICC = 4 µA (MAX.) at TA=25°C

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HIGH NOISE IMMUNITY:

VNIH = VNIL = 28% VCC (MIN.)

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POWER DOWN PROTECTION ON INPUTS

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SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 8 mA (MIN)

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BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

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OPERATING VOLTAGE RANGE:

VCC(OPR) = 2V to 5.5V

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PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 594

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IMPROVED LATCH-UP IMMUNITY

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LOW NOISE: VOLP = 0.8V (MAX.)

DESCRIPTION

The 74VHC594 is an high speed CMOS 8-BIT

SHIFT REGISTERS fabricated with sub-micron

silicon gate C2MOS technology.

This device contains an 8-bit serial-in, parallel-out

shift register that feeds an 8-bit D-type storage

register. Separate clocks and direct overriding

clear (SCLR, RCLR) are provided for both the shift

register and the storage register.

A serial (QH’) output is provided for cascading

purposes. Both the shift register and storage

register use positive-edge triggered clocks. If the

clocks are connected together, the shift register

state will always be one clock pulse ahead of the

storage register.

Power down protection is provided on all inputs

and 0 to 7V can be accepted on inputs with no

regard to the supply voltage. This device can be

used to interface 5V to 3V.

All inputs are equipped with protection circuits

against static discharge, giving them 2KV ESD

immunity and transient excess voltage.

74VHC594

8 BIT SHIFT REGISTER

WITH OUTPUT REGISTER

Figure 1: Pin Connection And IEC Logic Symbols

Table 1: Order Codes

PACKAGE

T & R

SOP

M74VHC594RMTR

TSSOP

M74VHC594TTR

TSSOP

SOP

Rev. 5

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