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PDF 74VHC299M Data sheet ( Hoja de datos )
| Número de pieza | 74VHC299M | |
| Descripción | 8-Input Universal Shift/Storage Register | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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PRELIMINARY
November 1995
74VHC299
8-Input Universal Shift Storage
Register with Common Parallel I O Pins
General Description
The VHC299 is an advanced high speed CMOS device fab-
ricated with silicon gate CMOS technology It achieves the
high-speed operation similar to equivalent Bipolar Schottky
TTL while maintaining the CMOS low power dissipation
The VHC299 is an 8-bit universal shift storage register with
TRI-STATE outputs Four modes of operation are possi-
ble hold (store) shift left shift right and load data The par-
allel load inputs and flip-flop outputs are multiplexed to re-
duce the total number of package pins Additional outputs
are provided for flip-flops Q0 Q7 to allow easy serial cas-
cading A separate active LOW Master Reset is used to
reset the register
An input protection circuit insures that 0V to 7V can be ap-
plied to the input pins without regard to the supply voltage
This device can be used to interface 5V to 3V systems and
two supply systems such as battery backup This circuit pre-
vents device destruction due to mismatched supply and in-
put voltages
Features
Y Low power dissipation
ICC e 4 mA at TA e 25 C
Y High noise immunity
VNIH e VNIL e 28% VCC (min)
Y All inputs are equipped with a power down protection
function
Y Balanced propagation delays tPLH j tPHL
Y Low noise VOLP e 0 9V (typ)
Y Pin and function compatible with 74HC299
Commercial
74VHC299M
74VHC299SJ
74VHC299MTC
74VHC299N
Package
Number
M20B
M20D
MTC20
N20A
Package Description
20-Lead Molded JEDEC SOIC
20-Lead Molded EIAJ SOIC
20-Lead Molded JEDEC Type 1 TSSOP
20-Lead Molded DIP
Note Surface mount packages are also available on Tape and Reel
Specify by appending the suffix letter ‘X’ to the ordering code
Logic Symbols
Connection Diagram
IEEE IEC
Pin Assignment for
DIP TSSOP and SOIC
TL F 11638–1
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 11638
TL F 11638 – 3
TL F 11638 – 2
RRD-B30M125 Printed in U S A
1 page  
DC Characteristics for ’VHC Family Devices
Symbol
Parameter
VOLP
Quiet Output Maximum Dynamic VOL
VOLV
Quiet Output Minimum Dynamic VOL
VIHD
Minimum High Level Dynamic Input Voltage
VILD
Maximum High Level Dynamic Input Voltage
Parameter guaranteed by design
74VHC
VCC
(V)
TA e a25 C
Units Conditions
Typ Limits
50 09
12
5 0 b0 9 b1 2
50 35
50 15
V CL e 50 pF
V CL e 50 pF
V CL e 50 pF
V CL e 50 pF
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet 74VHC299M.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| 74VHC299 | 8-Input Universal Shift/Storage Register | National Semiconductor |
| 74VHC299M | 8-Input Universal Shift/Storage Register | National Semiconductor |
| 74VHC299MTC | 8-Input Universal Shift/Storage Register | National Semiconductor |
| 74VHC299N | 8-Input Universal Shift/Storage Register | National Semiconductor |
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