MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT821/A/B
HIGH PERFORMANCE CMOS BUS INTERFACE REGISTER
1
JUNE 2002
MILITARY AND COMMERCIAL TEMPERATURE RANGES
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2002 Integrated Device Technology, Inc.
DSC-5427/2
FEATURES:
Equivalent to AMD's Am29821-25 bipolar registers in pinout/
function, speed and output drive over full temperature and
voltage supply extremes
IDT54/74FCT821A equivalent to FASTTM speed
IDT54/74FCT821B 25% faster than FAST
I
OL
= 48mA (commercial) and 32mA (military)
Clamp diodes on all inputs for ringing suppression
CMOS power levels (1mW typ. static)
TTL input and output compatibility
CMOS output level compatible
Substantially lower input current levels than AMD's bipolar
Am29800 series (5A max.)
Military product compliant to MIL-STD-883, Class B
Available in the following packages:
Commercial: SOIC
Military: CERDIP, LCC
FUNCTIONAL BLOCK DIAGRAM
IDT54/74FCT821A/B
HIGH PERFORMANCE
CMOS BUS INTERFACE
REGISTER
DESCRIPTION:
The FCT821 series is built using an advanced dual metal CMOS
technology. The FCT821 series bus interface registers are designed to
eliminate the extra packages required to buffer existing registers and
provide extra data width for wider address/data paths or buses carrying
parity. The 74FCT821 is a buffered, 10-bit wide version of the popular
FCT374 function.
The FCT821 high-performance interface family is designed for high-
capacitance load drive capability, while providing low-capacitance bus
loading at both inputs and outputs. All inputs have clamp diodes and all
outputs are designed for low-capacitance bus loading in high-impedance
state.
OE
C
1
CP
TO NINE O THER CHANNELS
23
1
D
Y
D
0
Q
MILITARY AND COMMERCIAL TEMPERATURE RANGES
2
IDT54/74FCT821/A/B
HIGH PERFORMANCE CMOS BUS INTERFACE REGISTER
PIN CONFIGURATION
Symbol
Rating
Commercial
Military
Unit
V
TERM
(2)
Terminal Voltage
0.5 to +7
0.5 to +7
V
with Respect to GND
V
TERM
(3)
Terminal Voltage
0.5 to V
CC
0.5 to V
CC
V
with Respect to GND
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
120
120
mA
ABSOLUTE MAXIMUM RATINGS
(1)
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS 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
Vcc by +0.5V unless otherwise noted.
2. Inputs and Vcc terminals only.
3. Outputs and I/O terminals only.
Pin Name
I/O
Description
Dx
I
D Flip-Flop Data Inputs
C P
I
Clock Pulse for the Register. Enters data into the
register on the LOW-to-HIGH transition
Y x
O
Register 3-State Outputs
OE
I
Output Control. When the OE input is HIGH, the Yx
outputs are in the high impedance state. When the
OE input is LOW, the TRUE register data is present
at the Yx outputs.
PIN DESCRIPTION
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
CAPACITANCE
(T
A
= +25C, F = 1.0MHz)
NOTE:
1. This parameter is measured at characterization but not tested.
CERDIP/ SOIC
TOP VIEW
LCC
TOP VIEW
LOGIC SYMBOL
C P
D
OE
Q
D
CP
Y
10
10
2
3
1
20
19
18
15
16
9
10
D
6
D
7
D
2
D
5
D
3
D
4
D
8
23
22
24
21
17
5
6
7
4
8
D
0
V
CC
CP
OE
13
14
11
12
D
1
GND
D
9
Y
6
Y
7
Y
2
Y
5
Y
3
Y
4
Y
8
Y
0
Y
1
Y
9
1
5
1
6
N
C
12
1
3
1
4
G
N
D
D
8
1
7
1
8
C
P
Y
9
Y
8
N
C
V
C
C
O
E
D
1
D
0
Y
0
Y
1
Y
3
NC
Y
4
5
6
8
7
9
10
11
1
2
8
4
3
2
2
7
2
6 25
24
22
23
21
20
1
9
D
5
NC
D
3
D
4
D
2
D
7
D
6
INDEX
Y
5
D
9
Y
2
Y
7
Y
6
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT821/A/B
HIGH PERFORMANCE CMOS BUS INTERFACE REGISTER
3
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High Impedance
NC = No Change
= LOW-to-HIGH transition
FUNCTION TABLE
(1)
Inputs
Outputs
OE
Dx
CP
Yx
Function
H
L
Z
High Z
H
H
Z
H
X
X
Z
Clear
L
X
X
L
H
X
X
Z
Hold
L
X
X
N C
H
L
Z
Load
H
H
Z
L
L
L
L
H
H
NOTES:
1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, +25C ambient.
3. Not more than one output should be tested at one time. Duration of the test should not exceed one second.
4. This parameter is guaranteed, but not tested.
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
V
IH
Input HIGH Level
Guaranteed Logic HIGH Level
2
--
--
V
V
IL
Input LOW Level
Guaranteed Logic LOW Level
--
--
0.8
V
I
IH
Input HIGH Current
V
CC
= Max.
V
I
= V
CC
--
--
5
A
V
I
= 2.7V
--
--
5
(4)
I
IL
Input LOW Current
V
CC
= Max.
V
I
= 0.5V
--
--
5
(4)
A
V
I
= GND
--
--
5
I
OZH
Off State (High Impedance)
V
CC
= Max.
V
O
= V
CC
--
--
10
Output Current
V
O
= 2.7V
--
--
10
(4)
A
I
OZL
V
O
= 0.5V
--
--
10
(4)
V
O
= GND
--
--
10
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18mA
--
0.7
1.2
V
I
OS
Short Circuit Current
V
CC
= Max., V
O
= GND
(3)
75
120
--
mA
V
OH
Output HIGH Voltage
V
CC
= 3V, V
IN
= V
LC
or V
HC
, I
OH
= 32A
V
HC
V
CC
--
V
CC
= Min
I
OH
= 300A
V
HC
V
CC
--
V
V
IN
= V
IH
or V
IL
I
OH
= 15mA MIL
2.4
4.3
--
I
OH
= 24mA COM
2.4
4.3
--
V
OL
Output LOW Voltage
V
CC
= 3V, V
IN
= V
LC
or V
HC
, I
OL
= 300A
--
GND
V
LC
V
CC
= Min
I
OL
= 300A
--
GND
V
LC
(4)
V
V
IN
= V
IH
or V
IL
I
OL
= 32mA MIL
--
0.3
0.5
I
OL
= 48mA COM
--
0.3
0.5
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: T
A
= 0C to +70C, V
CC
= 5.0V 5%; Military: T
A
= 55C to +125C, V
CC
= 5.0V 10%
MILITARY AND COMMERCIAL TEMPERATURE RANGES
4
IDT54/74FCT821/A/B
HIGH PERFORMANCE CMOS BUS INTERFACE REGISTER
POWER SUPPLY CHARACTERISTICS
V
LC
= 0.2V, V
HC
= V
CC
- 0.2V
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
I
CC
Quiescent Power Supply Current
V
CC
= Max.
--
0.2
1.5
mA
V
IN
V
HC
; V
IN
V
LC
I
CC
Quiescent Power Supply Current
V
CC
= Max.
--
0.5
2
mA
TTL Inputs HIGH
V
IN
= 3.4V
(3)
I
CCD
Dynamic Power Supply
V
CC
= Max.
V
IN
V
HC
--
0.15
0.25
mA/
Current
(4)
Outputs Open
V
IN
V
LC
MHz
OE = GND
One Input Toggling
50% Duty Cycle
I
C
Total Power Supply Current
(6)
V
CC
= Max.
V
IN
V
HC
--
1.7
4
mA
Outputs Open
V
IN
V
LC
f
CP
= 10MHz
50% Duty Cycle
OE = GND
V
IN
= 3.4V
--
2.2
6
One Bit Toggling
V
IN
= GND
at fi = 5MHz
50% Duty Cycle
V
CC
= Max.
V
IN
V
HC
--
4
7.8
(5)
Outputs Open
V
IN
V
LC
f
CP
= 10MHz
50% Duty Cycle
OE = GND
V
IN
= 3.4V
--
6.2
16.8
(5)
Eight Bits Toggling
V
IN
= GND
at fi = 2.5MHz
50% Duty Cycle
NOTES:
1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, +25C 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
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
= Output Frequency
N
i
= Number of Outputs at f
i
All currents are in milliamps and all frequencies are in megahertz.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT821/A/B
HIGH PERFORMANCE CMOS BUS INTERFACE REGISTER
5
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. These parameters are guaranteed but not tested.
IDT54/74FCT821A
IDT54/74FCT821B
Com'l.
Mil.
Com'l.
Mil.
Parameter Description
Conditions
(1)
Min.
(2)
Max.
Min.
(2)
Max.
Min.
(2)
Max.
Min.
(2)
Max.
Unit
t
PLH
Propagation Delay
C
L
= 50pF
--
10
--
11.5
--
7.5
--
8.5
ns
t
PHL
CP to Yx (OE = LOW)
R
L
= 500
C
L
= 300pF
(3)
--
20
--
20
--
15
--
16
R
L
= 500
t
SU
Set-up Time HIGH or LOW, Dx to CP
C
L
= 50pF
4
--
4
--
3
--
3
--
t
H
Hold Time HIGH or LOW, Dx to CP
R
L
= 500
2
--
2
--
1.5
--
1.5
--
ns
t
W
CP Pulse Width
,
HIGH or LOW
7
--
7
--
6
--
6
--
t
PZH
Output Enable Time
C
L
= 50pF
--
12
--
13
--
8
--
9
ns
t
PZL
OE to Yx
R
L
= 500
C
L
= 300pF
(3)
--
23
--
25
--
15
--
16
R
L
= 500
t
PHZ
Output Disable Time
C
L
= 5pF
(3)
--
7
--
8
--
6.5
--
7
ns
t
PLZ
OE to Yx
R
L
= 500
C
L
= 50pF
--
8
--
9
--
7.5
--
8
R
L
= 500
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
6
IDT54/74FCT821/A/B
HIGH PERFORMANCE CMOS BUS INTERFACE REGISTER
Pulse
Generator
R
T
D.U.T
.
V
CC
V
IN
C
L
V
OUT
50pF
500
500
7.0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
DATA
INPUT
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
t
SU
t
H
t
REM
t
SU
t
H
HIGH-LOW-HIGH
PULSE
LOW-HIGH-LOW
PULSE
t
W
1.5V
1.5V
SAME PHASE
INPUT TRANSITION
3V
1.5V
0V
1.5V
V
OH
t
PLH
OUTPUT
OPPOSITE PHASE
INPUT TRANSITION
3V
1.5V
0V
t
PLH
t
PHL
t
PHL
V
OL
CONTROL
INPUT
3V
1.5V
0V
3.5V
0V
OUTPUT
NORMALLY
LOW
OUTPUT
NORMALLY
HIGH
SWITCH
CLOSED
SWITCH
OPEN
V
OL
0.3V
0.3V
t
PLZ
t
PZL
t
PZH
t
PHZ
3.5V
0V
1.5V
1.5V
ENABLE
DISABLE
V
OH
PRESET
CLEAR
CLOCK ENABLE
ETC.
Octal link
Octal link
Octal link
Octal link
Octal link
TEST CIRCUITS AND WAVEFORMS
Propagation Delay
Test Circuits for All Outputs
Enable and Disable Times
Set-Up, Hold, and Release Times
Pulse Width
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
2. Pulse Generator for All Pulses: Rate
1.0MHz; Z
O
50; t
F
2.5ns; t
R
2.5ns.
Test
Switch
Open Drain
Disable Low
Closed
Enable Low
All Other Tests
Open
SWITCH POSITION
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT821/A/B
HIGH PERFORMANCE CMOS BUS INTERFACE REGISTER
7
ORDERING INFORMATION
IDT XX
Temp. Range
XXXX
Device Type
XX
Package
X
Process
SO
Commercial Options
Small Outline IC
High Performance CMOS Bus Inter-
face Register, 10-Bit
54
74
55C to +125C
0
C to +70C
D
L
Military Options
CERDIP
Leadless Chip Carrier
Blank
B
Commercial
MIL-STD-883, Class B
FCT
821A
821B
CORPORATE HEADQUARTERS
for SALES:
for Tech Support:
2975 Stender Way
800-345-7015 or 408-727-6116
logichelp@idt.com
Santa Clara, CA 95054
fax: 408-492-8674
(408) 654-6459
www.idt.com
6/25/2002 Updated as per PDNs Logic-00-07 and Logic-01-04
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