Datasheet IDT74FCT521E, IDT74FCT521DB, IDT74FCT521D, IDT74FCT521ASOB, IDT74FCT521ASO Datasheet (Integrated Device Technology)

Integrated Device Technology, Inc.

MILITARY AND COMMERCIAL TEMPERATURE RANGES MAY 1992

1992 Integrated Device Technology, Inc. 7.16 DSC-4617/2



PIN CONFIGURATIONS

The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a trademark of National Semiconductor Co.

FEATURES:

• IDT54/74FCT521 equivalent to FASTTM speed

• IDT54/74FCT521A 35% faster than FAST

• IDT54/74FCT521B 50% faster than FAST

• IDT54/74FCT521C 60% faster than FAST

• Equivalent to FAST output drive over full temperature
and voltage supply extremes

•I

OL = 48mA (commercial), and 32mA (military)

• CMOS power levels (1mW typ. static)

• TTL input and output level compatible

• CMOS output level compatible

• Substantially lower input current levels than FAST
(5µA max.)

FUNCTIONAL BLOCK DIAGRAM

FAST CMOS 8-BIT
IDENTITY COMPARATOR

IDT54/74FCT521
IDT54/74FCT521A
IDT54/74FCT521B
IDT54/74FCT521C

2604 drw 03

OA=B

A0
B0

A1

B1
A2

B2

A3

B3

GND

B

7

A7
B6
A6

A5

A4

B5

B4

VCC1

2
3

4
5
6
7
8
9
10 11

12

13

14

15

16

17

18

19

20

DIP/SOIC/CERPACK

TOP VIEW

P20-1

D20-1

SO20-2

&

E20-1

I

A=B

2604 drw 01

INDEX

A1
B1
A2
B2
A3

B7
A7

B6
A6

B5

A0

B0

IA=B

VCC

OA=B

B3

GND

A

4

B4

A5

LCC

TOP VIEW

3 2 20 19

1

4
5
6
7
8

18
17
16
15
14

9 10111213

L20-2

2604 drw 02

A0
B0

A1
B1

A2
B2

A3
B3

A4
B4

A5
B5

A6
B6

A7
B7

IA=B

OA=B

1

• Product available in Radiation Tolerant and Radiation
Enhanced versions

• JEDEC standard pinout for DIP and LCC

• Military product compliant to MIL-STD-883, Class B

DESCRIPTION:

The IDT54/74FCT521/A/B/C are 8-bit identity comparators

built using an advanced dual metal CMOS technology. These
devices compare two words of up to eight bits each and
provide a LOW output when the two words match bit for bit.
The expansion input

I

A = B also serves as an active LOW

enable input.

7.16 2

IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR MILITARY AND COMMERCIAL TEMPERATURE RANGES

FUNCTION TABLE

(1)

PIN DESCRIPTION

NOTE: 2604 tbl* 06

1. H = HIGH Voltage Level
L = LOW Voltage Level
*

A0 = B0, A1 = B1, A2 = B2, etc.

ABSOLUTE MAXIMUM RATINGS

(1)

CAPACITANCE (TA = +25°C, f = 1.0MHz)

Symbol Rating Commercial Military Unit

VTERM

(2)

Terminal Voltage
with Respect to
GND

–0.5 to +7.0 –0.5 to +7.0 V

VTERM

(3)

Terminal Voltage
with Respect to
GND

–0.5 to VCC –0.5 to VCC V

TA Operating

Temperature

0 to +70 –55 to +125 °C

TBIAS Temperature

Under Bias

–55 to +125 –65 to +135 °C

TSTG Storage

Temperature

–55 to +125 –65 to +150 °C

PT Power

Dissipation

0.5 0.5 W

IOUT DC Output

Current

120 120 mA

NOTE: 2604 tbl* 02

1. This parameter is measured at characterization but not tested.

NOTES:

2604 tbl* 01

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. Input and VCC terminals only.

3. Outputs and I/O terminals only.

2604 tbl* 05

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

Pin Names Description

A0 - A

7

Word A Inputs

B0 - B

7

Word B Inputs

IA =

B

Expansion or Enable Input (Active LOW)

OA =

B

Identity Output (Active LOW)

INPUTS OUTPUT

I

I

A = B A, B

O

O

A = B

L
L
H
H

A = B*

A ≠ B

A = B*

A ≠ B

L
H
H
H

IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR MILITARY AND COMMERCIAL TEMPERATURE RANGES

7.16 3

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

Following Conditions Apply Unless Otherwise Specified: VLC = 0.2V; VHC = VCC – 0.2V
Commercial: T

A = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC

= 5.0V ± 10%

Symbol Parameter Test Conditions

(1)

Min. Typ.

(2)

Max. Unit

VIH Input HIGH Level Guaranteed Logic HIGH Level 2.0 — — V
VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V
II H Input HIGH Current VCC = Max. VI = VCC —— 5µA

VI = 2.7V — — 5

(4)

II L Input LOW Current VI = 0.5V — — –5

(4)

VI = GND — — –5
VIK Clamp Diode Voltage VCC = Min., IN = –18mA — –0.7 –1.2 V
IOS Short Circuit Current VCC = Max.

(3)

, VO = GND –60 –120 — mA

VOH Output HIGH Voltage VCC = 3V, VIN = VLC or VHC, IOH = –32µAVHC VCC —V

VCC = Min. IOH = –300µAVHC VCC —

VIN = VIH or VIL IOH = –12mA MIL. 2.4 4.3 —

IOH = –15mA COM'L. 2.4 4.3 —
VOL Output LOW Voltage VCC = 3V, VIN = VLC or VHC, IOL = 300µA — GND VLC V

VCC = Min. IOL = 300µA — GND VLC

(4)

VIN = VIH or VIL IOL = 32mA MIL. — 0.3 0.5

IOL = 48mA COM'L. — 0.3 0.5

NOTES: 2604 tbl* 03

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 VCC = 5.0V, +25°C ambient and maximum loading.

3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second.

4. This parameter is guaranteed but not tested.

7.16 4

IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR MILITARY AND COMMERCIAL TEMPERATURE RANGES

POWER SUPPLY CHARACTERISTICS VLC = 0.2V; VHC = VCC – 0.2V

NOTES: 2604 tbl* 04

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 VCC or GND.

4. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.

5. I

C = IQUIESCENT + IINPUTS + IDYNAMIC

IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fiNi)
I

CC = Quiescent Current

∆I

CC = Power Supply Current for a TTL High Input (VIN = 3.4V)

D

H = Duty Cycle for TTL Inputs High

N

T = Number of TTL Inputs at DH

ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f

CP = Clock Frequency for Register Devices (Zero for Non-Register Devices)

fi = Input Frequency
Ni = Number of Inputs at fi
All currents are in milliamps and all frequencies are in megahertz.

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

NOTES: 2604 tbl* 07

1. See test circuit and waveforms.

2. Minimum limits are guaranteed but not tested on Propagation Delays.

Symbol Parameter Test Conditions

(1)

Min. Typ.

(2)

Max. Unit

ICC Quiescent Power Supply Current VCC = Max.

V

IN ≥ VHC; VIN ≤ VLC

— 0.2 1.5 mA

∆ICC

Quiescent Power Supply Current
TTL Inputs HIGH

VCC = Max.
V

IN = 3.4V

(3)

— 0.5 2.0 mA

ICCD Dynamic Power Supply Current

(4)

VCC = Max.
Outputs Open
One Input Toggling
50% Duty Cycle

VIN ≥ VHC

VIN ≤ VLC

— 0.15 0.25 mA/

MHz

IC Total Power Supply Current

(5)

VCC = Max.
Outputs Open

VIN ≥ VHC

VIN ≤ VLC (FCT)

— 1.7 4.0 mA

fi = 10MHz
One Bit Toggling
50% Duty Cycle

VIN = 3.4V

V

IN = GND

— 2.0 5.0

IDT54/74FCT521 IDT54/74FCT521A IDT54/74FCT521B IDT54/74FCT521C

Com'l. Mil. Com'l. Mil. Com'l. Mil. Com'l. Mil.

Symbol Parameter Condition

(1)

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max.

Unit

t

PLH

t

PHL

Propagation
Delay
An or Bn to

O

A

=

B

CL = 50pF

R

L

= 500

Ω

1.5 11.0 1.5 15.0 1.5 7.2 1.5 9.5 1.5 5.5 1.5 7.3 1.5 4.5 1.5 5.1 ns

t

PLH

t

PHL

Propagation
Delay
IA = B to

O

A

=

B

1.5 10.0 1.5 9.0 1.5 6.0 1.5 7.8 1.5 4.6 1.5 6.0 1.5 4.1 1.5 4.5 ns

IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR MILITARY AND COMMERCIAL TEMPERATURE RANGES

7.16 5

TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS

ENABLE AND DISABLE TIMESPROPAGATION DELAY

SET-UP, HOLD AND RELEASE TIMES PULSE WIDTH

Pulse

Generator

DATA

INPUT

TIMING

INPUT

ASYNCHRONOUS CONTROL

PRESET

CLEAR

ETC.

SYNCHRONOUS CONTROL

PRESET

CLEAR

CLOCK ENABLE

ETC.

3V

1.5V
0V

3V

1.5V
0V

3V

1.5V
0V

3V

1.5V
0V

t

SU

t

H

t

REM

H

tSU

RT

D.U.T.

VCC

VIN

CL

VOUT

50pF

500Ω

500Ω

7.0V

SAME PHASE

INPUT TRANSITION

3V

1.5V
0V

1.5V

V

OH

V

OL

t

PLH

t

PHL

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

CONTROL

INPUT

3V

1.5V
0V

3.5V

0V

OUTPUT

NORMALLY

LOW

OUTPUT

NORMALLY

HIGH

SWITCH
CLOSED

SWITCH
OPEN

V

OL

V

OH

3V

1.5V
0V

t

PLH

t

PHL

0.3V

0.3V

t

PLZ

t

PZL

t

PZH

t

PHZ

3.5V

0V

1.5V

1.5V

ENABLE DISABLE

HIGH-LOW-HIGH

PULSE

LOW-HIGH-LOW

PULSE

t

W

1.5V

1.5V

t

NOTES 2604 drw 04

1. Diagram shown for input Control Enable-LOW and input Control
Disable-HIGH.

2. Pulse Generator for All Pulses: Rate ≤ 1.0 MHz; Z

O ≤ 50Ω; tF ≤ 2.5ns;

t

R ≤ 2.5ns.

SWITCH POSITION

Test Switch

Open Drain

Disable Low Closed

Enable Low

All Other Tests Open

DEFINITIONS: 2604 tbl 08

CL = Load capacitance: includes jig and probe capacitance.
R

T = Termination resistance: should be equal to ZOUT of the Pulse

Generator.

7.16 6

IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR MILITARY AND COMMERCIAL TEMPERATURE RANGES

ORDERING INFORMATION

2604 cnv* 09

IDT XX FCT XXXX

Device TypeXPackage

X

Process

Blank
B

P
D
E
L
SO

521
521A
521B
521C

Commercial
MIL-STD-883, Class B

Plastic DIP
CERDIP
CERPACK
Leadless Chip Carrier
Small Outline IC

8-Bit Comparator
Fast 8-Bit Comparator
Very Fast 8-Bit Comparator
Super Fast 8-Bit Comparator

54
74

–55

°

C to +125°C

0

°

C to +70°C

Temp. Range