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74VHC573 Datasheet PDF

74VHC573
Fairchild Semiconductor

Part Number 74VHC573
Description Octal D-Type Latch with 3-STATE Outputs
Page 7 Pages
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March 1993
Revised April 1999
74VHC573
Octal D-Type Latch with 3-STATE Outputs
General Description
The VHC573 is an advanced high speed CMOS octal latch
with 3-STATE output fabricated with silicon gate CMOS
technology. It achieves the high speed operation similar to
equivalent Bipolar Schottky TTL while maintaining the
CMOS low power dissipation. This 8-bit D-type latch is con-
trolled by a latch enable input (LE) and an Output Enable
input (OE). When the OE input is HIGH, the eight outputs
are in a high impedance state.
An input protection circuit ensures that 0V to 7V can be
applied to the input pins without regard to the supply volt-
age. This device can be used to interface 5V to 3V systems
and two supply systems such as battery back up. This cir-
cuit prevents device destruction due to mismatched supply
and input voltages.
Features
s High Speed: tPD = 5.0 ns (typ) at VCC = 5V
s High Noise Immunity: VNIH = VNIL = 28% VCC (Min)
s Power Down Protection is provided on all inputs
s Low Noise: VOLP = 0.6V (typ)
s Low Power Dissipation: ICC = 4 µA (Max) @ TA = 25°C
s Pin and function compatible with 74HC573
Ordering Code:
Order Number Package Number
Package Description
74VHC573M
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
74VHC573SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74VHC573MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74VHC573N
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
D0–D7
LE
OE
O0–O7
Description
Data Inputs
Latch Enable Input
3-STATE Output Enable Input
3-STATE Outputs
© 1999 Fairchild Semiconductor Corporation DS011563.prf
www.fairchildsemi.com

















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