L29C521PC22 Logic Devices Inc., L29C521PC22 Datasheet

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L29C521PC22

Manufacturer Part Number
L29C521PC22
Description
Manufacturer
Logic Devices Inc.
Datasheet
DEVICES INCORPORATED
FEATURES
L29C520/521 B
DEVICES INCORPORATED
Four 8-bit Registers
Implements Double 2-Stage Pipeline
or Single 4-Stage Pipeline Register
Hold, Shift, and Load Instructions
Separate Data In and Data Out Pins
High-Speed, Low Power CMOS
Technology
Three-State Outputs
Replaces IDT29FCT520/IDT29FCT521
and AMD Am29520/Am29521
Package Styles Available:
• 24-pin PDIP
• 28-pin PLCC, J-Lead
CLK
D
I
8-0
1-0
8
2
LOCK
D
IAGRAM
The L29C520 and L29C521 are pin-
for-pin compatible with the
IDT29FCT520/IDT29FCT521 and
AMD Am29520/Am29521, imple-
mented in low power CMOS.
The L29C520 and L29C521 contain
four registers which can be configured
as two independent, 2-level pipelines
or as one 4-level pipeline.
The Instruction pins, I
loading of the registers. For either
device, the registers may be config-
ured as a four-stage delay line, with
data loaded into R1 and shifted
sequentially through R2, R3, and R4.
Also, for the L29C520, data may be
loaded from the inputs into either R1
or R3 with only R2 or R4 shifting. The
L29C521 differs from the L29C520 in
that R2 and R4 remain unchanged
during this type of data load, as
shown in Tables 1 and 2. Finally, I
may be set to prevent any register
from changing.
DESCRIPTION
REG 1
REG 2
REG 3
REG 4
4 x 8-bit Multilevel Pipeline Register
1
1-0
, control the
4 x 8-bit Multilevel Pipeline Register
8
2
Y
OE
S
7-0
1-0
1-0
The S
multiplexer which routes the contents
of any of the registers to the Y output
pins. The independence of the I and S
controls allows simultaneous write
and read operations on different
registers.
S
I
H
H
I
H
H
H
H
T
L29C520 I
L
L
T
L29C521 I
L
L
T
L
L
1
1
1
ABLE
ABLE
ABLE
L29C520/521
S
I
H
H
I
H
H
H
H
L
L
L
L
L
L
0
0
1-0
0
Description
D R1 R1 R2 R2 R3 R3 R4
HOLD
D R1 R1 R2 HOLD
ALL REGISTERS ON HOLD
Description
D R1 R1 R2 R2 R3 R3 R4
HOLD
D R1 HOLD
ALL REGISTERS ON HOLD
Register Selected
Register 4
Register 3
Register 2
Register 1
select lines control a 4-to-1
1.
2.
3. O
Pipeline Registers
NSTRUCTION
NSTRUCTION
HOLD
HOLD
UTPUT
L29C520/521
S
D R3
D R3
HOLD
08/02/2000–LDS.520/1-P
ELECT
T
T
ABLE
ABLE
R3 R4
HOLD
HOLD
HOLD

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L29C521PC22 Summary of contents

Page 1

DEVICES INCORPORATED DEVICES INCORPORATED FEATURES Four 8-bit Registers Implements Double 2-Stage Pipeline or Single 4-Stage Pipeline Register Hold, Shift, and Load Instructions Separate Data In and Data Out Pins High-Speed, Low Power CMOS Technology Three-State Outputs Replaces IDT29FCT520/IDT29FCT521 and AMD ...

Page 2

DEVICES INCORPORATED M R Above which useful life may be impaired (Notes AXIMUM ATINGS Storage temperature ........................................................................................................... –65°C to +150°C Operating ambient temperature ........................................................................................... –55°C to +125°C V supply voltage with respect to ground ............................................................................ –0.5 ...

Page 3

DEVICES INCORPORATED SWITCHING CHARACTERISTICS OMMERCIAL PERATING ANGE Symbol Parameter t Clock to Output Delay PD t Select to Output Delay SEL t Clock Pulse Width PW t Instruction Setup Time SI t Instruction Hold Time HI t ...

Page 4

DEVICES INCORPORATED NOTES 1. Maximum Ratings indicate stress specifications only. Functional oper- ation of these products at values beyond those indicated in the Operating Condi- tions table is not implied. Exposure to maximum rating conditions for ex- tended periods may ...

Page 5

DEVICES INCORPORATED L29C520 — ORDERING INFORMATION 24-pin — 0.3" wide ...

Page 6

DEVICES INCORPORATED L29C520 — ORDERING INFORMATION ...

Page 7

... DEVICES INCORPORATED L29C521 — ORDERING INFORMATION 24-pin — 0.3" wide CLK GND 12 Plastic DIP (P2) Speed 0°C to +70°C — C OMMERCIAL 22 ns L29C521PC22 –55°C to +125°C — C OMMERCIAL –55°C to +125°C — MIL-STD-883 8-bit Multilevel Pipeline Register 28-pin CREENING S CREENING ...

Page 8

DEVICES INCORPORATED ...

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