Integrated Device Technology, Inc.
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
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
2619 drw 01
REGISTER
CONTROL
2
1
I ,I
1
0
CLK
OCTAL REG. A1
OCTAL REG. A2
OCTAL REG. B1
OCTAL REG. B2
MUX
MUX
2
S ,S
1
0
8
Y -Y
7
0
OE
8
D -D
7
0
MULTILEVEL
PIPELINE REGISTERS
IDT29FCT520AT/BT/CT/DT
IDT29FCT521AT/BT/CT/DT
MILITARY AND COMMERCIAL TEMPERATURE RANGES
APRIL 1994
1994 Integrated Device Technology, Inc.
DSC-4215/4
1
FEATURES:
A, B, C and D speed grades
Low input and output leakage
1
A (max.)
CMOS power levels
True TTL input and output compatibility
V
OH
= 3.3V (typ.)
V
OL
= 0.3V (typ.)
High drive outputs (-15mA I
OH
, 48mA I
OL
)
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
6.2
6.2
2
IDT29FCT520AT/BT/CT/DT, 521AT/BT/CT/DT
MULTILEVEL PIPELINE REGISTERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATIONS
NOTE:
1. I = 3 for hold.
Figure 1. Data Loading in 2-Level Operation
DUAL 2-LEVEL
SINGLE 4-LEVEL
2619 drw 04
A
1
A
2
B
1
B
2
A
1
A
2
B
1
B
2
I = 2
I = 1
A
1
A
2
B
1
B
2
A
1
A
2
B
1
B
2
I = 2
I = 1
A
1
A
2
B
1
B
2
I = 0
A
1
A
2
B
1
B
2
I = 0
IDT29FCT520T
IDT29FCT521T
5
6
7
8
9
10
11
12
GND
1
2
3
4
24
23
22
21
20
19
18
17
Vcc
16
15
14
13
P24-1
D24-1
SO24-2
SO24-7
SO24-8*
&
E24-1
S
0
S
1
Y
0
Y
1
Y
2
Y
3
Y
4
Y
5
OE
I
0
I
1
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
CLK
Y
6
Y
7
*FCT520 only
DEFINITION OF FUNCTIONAL TERMS
Pin Names
Description
D
n
Register input Port.
CLK
Clock input. Enter data into registers on LOW-
to-HIGH transitions.
I
0
, I
1
Instruction inputs. See Figure 1 and in-
struction Control Tables.
S
0
, S
1
Multiplexer select. Inputs either register A
1
, A
2
,
B
1
or B
2
data to be available at the output port.
OE
Output enable for 3-state output port.
Y
n
Register output port.
2619 tbl 01
REGISTER SELECTION
S
1
S
0
Register
0
0
B
2
0
1
B
1
1
0
A
2
1
1
A
1
2619 tbl 02
I
2619 drw 03
5
6
7
8
9
10
11
L28-1
25
24
23
22
21
20
19
INDEX
D
1
D
2
D
3
D
4
D
5
D
6
NC
Vcc
S
0
S
1
D
0
I
1
0
GND
NC
NC
NC
Y
0
Y
1
Y
2
Y
3
Y
4
Y
5
D
7
CLK
OE
Y
6
Y
7
12 13 14 15 16 17 18
4
3
2
1
28 27 26
2619 drw 02
DIP/SOIC/SSOP/QSOP/CERPACK
TOP VIEW
LCC
TOP VIEW
IDT29FCT520AT/BT/CT/DT, 521AT/BT/CT/DT
MULTILEVEL PIPELINE REGISTERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
6.2
3
CAPACITANCE
(T
A
= +25
C, f = 1.0MHz)
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Rating
Commercial
Military
Unit
V
TERM(2)
Terminal Voltage
with Respect to
GND
0.5 to +7.0
0.5 to +7.0
V
V
TERM(3)
Terminal Voltage
with Respect to
GND
0.5 to
V
CC
+0.5
0.5 to
V
CC
+0.5
V
T
A
Operating
Temperature
0 to +70
55 to +125
C
T
BIAS
Temperature
Under Bias
55 to +125
65 to +135
C
T
STG
Storage
Temperature
55 to +125
65 to +150
C
P
T
Power Dissipation
0.5
0.5
W
I
OUT
DC Output
Current
60 to +120 60 to +120 mA
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-
INGS may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions
above those indicated in the operational sections of this specification is
not implied. Exposure to absolute maximum rating conditions for
extended periods may affect reliability. No terminal voltage may exceed
V
CC
by +0.5V unless otherwise noted.
2. Input and V
CC
terminals only.
3. Outputs and I/O terminals only.
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: T
A
= 0
C to +70
C, V
CC
= 5.0V
5%; Military: T
A
= 55
C to +125
C, V
CC
= 5.0V
10%
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
V
IH
Input HIGH Level
Guaranteed Logic HIGH Level
2.0
--
--
V
V
IL
Input LOW Level
Guaranteed Logic LOW Level
--
--
0.8
V
I
IH
Input HIGH Current
(4)
V
CC
= Max.
V
I
= 2.7V
--
--
1
A
I
IL
Input LOW Current
(4)
V
CC
= Max.
V
I
= 0.5V
--
--
1
A
I
OZH
High Impedance
(4)
V
CC
= Max.
V
O
= 2.7V
--
--
1
A
I
OZL
Output Current
V
O
= 0.5V
--
--
1
I
I
Input HIGH Current
(4)
V
CC
= Max., V
I
= V
CC
(Max.)
--
--
1
A
V
IK
Clamp Diode Voltage
V
CC
= Min., I
N
= 18mA
--
0.7
1.2
V
I
OS
Short Circuit Current
V
CC
= Max.
(3)
, V
O
= GND
60
120
225
mA
V
OH
Output HIGH Voltage
V
CC
= Min.
I
OH
= 6mA MIL.
2.4
3.3
--
V
V
IN
= V
IH
or V
IL
I
OH
= 8mA COM'L.
I
OH
= 12mA MIL.
2.0
3.0
--
I
OH
= 15mA COM'L.
V
OL
Output LOW Voltage
V
CC
= Min.
I
OL
= 32mA MIL.
--
0.3
0.5
V
V
IN
= V
IH
or V
IL
I
OL
= 48mA COM'L.
V
H
Input Hysteresis
--
--
200
--
mV
I
CC
Quiescent Power
V
CC
= Max.
--
0.01
1
mA
Supply Current
V
IN
= GND or V
CC
NOTES:
2619 tbl 05
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, +25
C ambient.
3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second.
4. The test limit for this parameter is
5
A at T
A
= -55
C.
Symbol
Parameter
(1)
Conditions
Typ.
Max. Unit
C
IN
Input
Capacitance
V
IN
= 0V
6
10
pF
C
OUT
Output
Capacitance
V
OUT
= 0V
8
12
pF
2619 lnk 04
2619 lnk 03
NOTE:
1. This parameter is measured at characterization but not tested.
6.2
4
IDT29FCT520AT/BT/CT/DT, 521AT/BT/CT/DT
MULTILEVEL PIPELINE REGISTERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
I
CC
Quiescent Power Supply
V
CC
= Max.
--
0.5
2.0
mA
Current, TTL Inputs HIGH
V
IN
= 3.4V
(3)
I
CCD
Dynamic Power Supply Current
(4)
V
CC
= Max., Outputs Open
V
IN
= V
CC
--
0.15
0.25
mA/
OE
= GND
V
IN
= GND
MHz
One Input Toggling
50% Duty Cycle
I
C
Total Power Supply Current
(6)
V
CC
= Max., Outputs Open
V
IN
= V
CC
--
1.5
3.5
mA
f
CP
= 10MHz
V
IN
= GND
50% Duty Cycle
OE
= GND
One Bit Toggling
V
IN
= 3.4V
--
2.0
5.5
at f
i
= 5MHz
V
IN
= GND
50% Duty Cycle
V
CC
= Max., Outputs Open
V
IN
= V
CC
--
3.8
7.3
(5)
f
CP
= 10MHz
V
IN
= GND
50% Duty Cycle
OE
= GND
Eight Bits Toggling
V
IN
= 3.4V
--
6.0
16.3
(5)
at f
i
= 2.5MHz
V
IN
= GND
50% Duty Cycle
NOTES:
2619 tbl 06
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, +25
C ambient.
3. Per TTL driven input (V
IN
= 3.4V); all other inputs at V
CC
or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
5. Values for these conditions are examples of the I
CC
formula. These limits are guaranteed but not tested.
6. I
C
= I
QUIESCENT
+I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
I
CC
D
H
N
T
+ I
CCD
(f
CP
/2 + f
i
N
i
)
I
CC
= Quiescent Current
I
CC
= Power Supply Current for a TTL HIgh Input (V
IN
= 3.4V)
D
H
= Duty Cycle for TTL Inputs High
N
T
= Number of TTL inputs at D
H
I
CCD
= Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f
CP
= Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
i
= Input Frequency
N
i
= Number of Inputs at f
i
All currents are in milliamps and all frequencies are in megahertz.
IDT29FCT520AT/BT/CT/DT, 521AT/BT/CT/DT
MULTILEVEL PIPELINE REGISTERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
6.2
5
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT520AT/521AT
FCT520BT/521BT
Com'l.
Mil.
Com'l.
Mil.
Symbol
Parameter
Condition
(1)
Min
.
(2)
Max.
Min
.
(2)
Max.
Min
.
(2)
Max.
Min
.
(2)
Max.
Unit
t
PHL
t
PLH
Propagation Delay
CLK to Yn
C
L
= 50pF
R
L
= 500
2.0
14.0
2.0
16.0
2.0
7.5
2.0
8.0
ns
t
PHL
t
PLH
Propagation Delay
S
0
or S
1
to Yn
2.0
13.0
2.0
15.0
2.0
7.5
2.0
8.0
ns
t
SU
Set-up Time, HIGH or LOW
Dn to CLK
5.0
--
6.0
--
2.5
--
2.8
--
ns
t
H
Hold Time, HIGH or LOW
Dn to CLK
2.0
--
2.0
--
2.0
--
2.0
--
ns
t
SU
Set-up Time, HIGH or LOW
I
0
or I
1
to CLK
5.0
--
6.0
--
4.0
--
4.5
--
ns
t
H
Hold Time, HIGH or LOW
I
0
or I
1
to CLK
2.0
--
2.0
--
2.0
--
2.0
--
ns
t
PHZ
t
PLZ
Output Disable Time
1.5
12.0
1.5
13.0
1.5
7.0
1.5
7.5
ns
t
PZH
t
PZL
Output Enable Time
1.5
15.0
1.5
16.0
1.5
7.5
1.5
8.0
ns
t
W
Clock Pulse Width
HIGH or LOW
7.0
--
8.0
--
5.5
--
6.0
--
ns
NOTES:
2619 tbl 08
1. See test circuit and waveforms.
2. Minimum units are guaranteed but not tested on Propagation Delays.
2619 tbl 07
FCT520CT/521CT
FCT520DT/521DT
Com'l.
Mil.
Com'l.
Mil.
Symbol
Parameter
Condition
(1)
Min
.
(2)
Max.
Min
.
(2)
Max.
Min
.
(2)
Max.
Min
.
(2)
Max.
Unit
t
PHL
t
PLH
Propagation Delay
CLK to Yn
C
L
= 50pF
R
L
= 500
2.0
6.0
2.0
7.0
2.0
5.2
--
--
ns
t
PHL
t
PLH
Propagation Delay
S
0
or S
1
to Yn
2.0
6.0
2.0
7.0
2.0
4.8
--
--
ns
t
SU
Set-up Time, HIGH or LOW
Dn to CLK
2.5
--
2.8
--
1.5
--
--
--
ns
t
H
Hold Time, HIGH or LOW
Dn to CLK
2.0
--
2.0
--
1.0
--
--
--
ns
t
SU
Set-up Time, HIGH or LOW
I
0
or I
1
to CLK
4.0
--
4.5
--
2.0
--
--
--
ns
t
H
Hold Time, HIGH or LOW
I
0
or I
1
to CLK
2.0
--
2.0
--
1.0
--
--
--
ns
t
PHZ
t
PLZ
Output Disable Time
1.5
6.0
1.5
6.0
1.5
4.8
--
--
ns
t
PZH
t
PZL
Output Enable Time
1.5
6.0
1.5
7.0
1.5
4.0
--
--
ns
t
W
Clock Pulse Width
HIGH or LOW
(3)
5.5
--
6.0
--
3.0
--
--
--
ns
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