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Integrated Device Technology - MULTILEVEL PIPELINE REGISTERS

Numéro de référence 7429FCT520BTD
Description MULTILEVEL PIPELINE REGISTERS
Fabricant Integrated Device Technology 
Logo Integrated Device Technology 





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7429FCT520BTD fiche technique
MULTILEVEL
PIPELINE REGISTERS
IDT29FCT520AT/BT/CT/DT
IDT29FCT521AT/BT/CT/DT
Integrated Device Technology, Inc.
FEATURES:
• A, B, C and D speed grades
• Low input and output leakage 1µA (max.)
• CMOS power levels
• True TTL input and output compatibility
– VOH = 3.3V (typ.)
– VOL = 0.3V (typ.)
• High drive outputs (-15mA IOH, 48mA IOL)
• Meets or exceeds JEDEC standard 18 specifications
• Product available in Radiation Tolerant and Radiation
Enhanced versions
• Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
• Available in DIP, SOIC, SSOP, QSOP, CERPACK and
LCC packages
DESCRIPTION:
The IDT29FCT520AT/BT/CT/DT and IDT29FCT521AT/
BT/CT/DT each contain four 8-bit positive edge-triggered
registers. These may be operated as a dual 2-level or as a
single 4-level pipeline. A single 8-bit input is provided and any
of the four registers is available at the 8-bit, 3-state output.
These devices differ only in the way data is loaded into and
between the registers in 2-level operation. The difference is
illustrated in Figure 1. In the IDT29FCT520AT/BT/CT/DT
when data is entered into the first level (I = 2 or I = 1), the
existing data in the first level is moved to the second level. In
the IDT29FCT521AT/BT/CT/DT, these instructions simply
cause the data in the first level to be overwritten. Transfer of
data to the second level is achieved using the 4-level shift
instruction (I = 0). This transfer also causes the first level to
change. In either part I=3 is for hold.
FUNCTIONAL BLOCK DIAGRAM
D0 -D7
8
I0,I1 2
REGISTER
CONTROL
CLK 1
OCTAL REG. A1
OCTAL REG. A2
MUX
OCTAL REG. B1
OCTAL REG. B2
S0 ,S1 2
MUX
OE
8
Y0 -Y7
2619 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1994 Integrated Device Technology, Inc.
6.2
APRIL 1994
DSC-4215/4
1

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