INDUSTRIAL TEMPERATURE RANGE

IDT29FCT2052AT/BT/CT
FAST CMOS OCTAL REGISTERED TRANSCEIVER

MAY 2001

INDUSTRIAL TEMPERATURE RANGE

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

DSC-5502/1

FEATURES:

· A, B, and C grades
· Low input and output leakage

1µA (max.)

· CMOS power levels
· True TTL input and output compatibility:

 V

= 3.3V (typ.)

 V

= 0.3V (typ.)

· High Drive outputs (-15mA I

, 48mA I

)

· Meets or exceeds JEDEC standard 18 specifications
· Power off disable outputs permit "live insertion"
· Available in SOIC and QSOP packages

FUNCTIONAL BLOCK DIAGRAM

IDT29FCT2052AT/BT/CT

FAST CMOS

OCTAL REGISTERED

TRANSCEIVER

DESCRIPTION:

The IDT29FCT2052T is an 8-bit registered transceiver built using an

advanced dual metal CMOS technology. Two 8-bit back-to-back registers
store data flowing in both directions between two bidirectional buses.
Separate clock, clock enable and 3-state output enable signals are provided
for each register. Both A outputs and B outputs are guaranteed to sink 64mA.

The IDT29FCT2052T has balanced drive outputs with current limiting

resistors. This offers low ground bounce, minimal undershoot and con-
trolled output fall times-reducing the need for external series terminating
resistors. The IDT29FCT2052T is a plug-in replacement for the IDT29FCT52T.

Reg.

OEA

CPB

CEB

OEB

CPA

CEA

INDUSTRIAL TEMPERATURE RANGE

IDT29FCT2052AT/BT/CT
FAST CMOS OCTAL REGISTERED TRANSCEIVER

PIN CONFIGURATION

Symbol

Description

Max

Unit

TERM

(2)

Terminal Voltage with Respect to GND

0.5 to +7

TERM

(3)

Terminal Voltage with Respect to GND

0.5 to V

+0.5

STG

Storage Temperature

65 to +150

°C

OUT

DC Output Current

60 to +120

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. Output and I/O terminals only.

Symbol

Parameter

(1)

Conditions

Typ.

Max.

Unit

Input Capacitance

= 0V

OUT

Output Capacitance

OUT

= 0V

CAPACITANCE

= +25°C, F = 1.0MHz)

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

SOIC/ QSOP

TOP VIEW

OEA

CPB

CEB

CEA

GND

OEB

CPA

NOTE:
1. H = HIGH Voltage Level

L = LOW Voltage Level
X = Don't Care
NC = No Change

= LOW-to-HIGH Transition

(1)

(Applies to A or B Register)

Inputs

Internal

Function

N C

Hold Data

Load Data

OUTPUT CONTROL

(1)

Internal

Y-Outputs

Function

Disable Outputs

Enable Outputs

NOTE:
1. H = HIGH Voltage Level

L = LOW Voltage Level
X = Don't Care
Z = High-Impedance

INDUSTRIAL TEMPERATURE RANGE

IDT29FCT2052AT/BT/CT
FAST CMOS OCTAL REGISTERED TRANSCEIVER

Symbol

Parameter

Test Conditions

(1)

Min.

Typ.

(2)

Max.

Unit

Input HIGH Level

Guaranteed Logic HIGH Level

Input LOW Level

Guaranteed Logic LOW Level

0.8

Input HIGH Current

(4)

= Max.

= 2.7V

±1

µA

Input LOW Current

(4)

= Max.

= 0.5V

±1

µA

OZH

High Impedance Output Current

= Max., V

= V

(Max.)

= 2.7V

±1

µA

OZL

(3-State Output pins)

(4)

= 0.5V

±1

Input HIGH Current

(4)

= Max., V

= V

(Max.)

±1

µA

Clamp Diode Voltage

= Min., I

= 18mA

0.7

1.2

Input Hysteresis

200

Quiescent Power Supply Current

= 3V

0.01

µA

= GND or V

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

Following Conditions Apply Unless Otherwise Specified:
Industrial: T

= 40°C to +85°C, V

= 5.0V ±5%

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

= 5.0V, +25°C ambient.

3. Not more than one output should be tested at one time. Duration of the test should not exceed one second.
4. The test limit for this parameter is ±5µA at T

= 55°C.

Symbol

Parameter

Test Conditions

(1)

Min.

Typ.

(2)

Max.

Unit

ODL

Output LOW Current

= 5V, V

= V

or V

, V

OUT

= 1.5V

(3)

ODH

Output HIGH Current

= 5V, V

= V

or V

, V

OUT

= 1.5V

(3)

-16

-48

Output HIGH Voltage

= Min

= 15mA

2.4

3.3

= V

or V

Output LOW Voltage

= Min

= 12mA

0.3

0.5

= V

or V

OUTPUT DRIVE CHARACTERISTICS

PIN DESCRIPTION

Name

I/O

Description

0-7

I/O

Eight bidirectional lines carrying the A Register inputs or B Register outputs

0-7

I/O

Eight bidirectional lines carrying the B Register inputs or A Register outputs

CPA

Clock for the A Register. When CEA is LOW, data is entered into the A Register on the LOW-to-HIGH transition of the CPA signal.

CEA

Clock Enable for the A Register. When CEA is LOW, data is entered into the A Register on the LOW-to-HIGH transition of the CPA signal. When
CEA is HIGH, the A Register holds its contents, regardless of CPA signal transitions.

OEB

Output Enable for the A Register. When OEB is LOW, the A Register outputs are enabled onto the B

0-7

lines. When OEB is HIGH, the B

0-7

outputs

are in the high-impedance state.

CPB

Clock for the B Register. When CEB is LOW, data is entered into the B Register on the LOW-to-HIGH transition of the CPB signal.

CEB

Clock Enable for the B Register. When CEB is LOW, data is entered into the B Register on the LOW-to-HIGH transition of the CPB signal. When
CEB is HIGH, the B Register holds its contents, regardless of CPB signal transitions.

OEA

Output Enable for the B Register. When OEA is LOW, the B Register outputs are enabled onto the A

0-7

lines. When OEA is HIGH, the A

0-7

outputs

are in the high-impedance state.

INDUSTRIAL TEMPERATURE RANGE

IDT29FCT2052AT/BT/CT
FAST CMOS OCTAL REGISTERED TRANSCEIVER

Symbol

Parameter

Test Conditions

(1)

Min.

Typ.

(2)

Max.

Unit

Quiescent Power Supply Current

= Max.

0.5

TTL Inputs HIGH

= 3.4V

(3)

CCD

Dynamic Power Supply

= Max.

= V

0.06

0.12

mA/

Current

(4)

Outputs Open

= GND

MHz

or OE

= GND

One Input Toggling
50% Duty Cycle

Total Power Supply Current

(6)

= Max.

= V

0.6

2.2

Outputs Open

= GND

= 10MHz

50% Duty Cycle
OE

or OE

= GND

= 3.4V

1.1

4.2

One Bit Toggling

= GND

at f

= 5MHz

50% Duty Cycle
V

= Max.

= V

1.5

(5)

Outputs Open

= GND

= 10MHz

50% Duty Cycle
OE

or OE

= GND

= 3.4V

3.8

(5)

Eight Bits Toggling

= GND

at f

= 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

= 5.0V, +25°C ambient.

3. Per TTL driven input (V

= 3.4V). All other inputs at V

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

formula. These limits are guaranteed but not tested.

6. I

= I

QUIESCENT

+ I

INPUTS

+ I

DYNAMIC

= I

+ I

CCD

/2+ f

)

= Quiescent Current

= Power Supply Current for a TTL High Input (V

= 3.4V)

= Duty Cycle for TTL Inputs High

= Number of TTL Inputs at D

CCD

= Dynamic Current caused by an Input Transition Pair (HLH or LHL)

= Output Frequency

= Number of Outputs at f

All currents are in milliamps and all frequencies are in megahertz.

POWER SUPPLY CHARACTERISTICS

INDUSTRIAL TEMPERATURE RANGE

IDT29FCT2052AT/BT/CT
FAST CMOS OCTAL REGISTERED TRANSCEIVER

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

(1)

29FCT2052AT

29FCT2052BT

29FCT2052CT

Symbol

Parameter

Condition

(1)

Min

(2)

Max.

Min

(2)

Max.

Min

(2)

Max.

Unit

PLH

Propagation Delay

= 50pF

7.5

6.3

PHL

CPA, CPB to An, Bn

= 500

PZH

Output Enable Time

1.5

10.5

1.5

PZL

OEA or OEB to An, Bn

PHZ

Output Disable Time

1.5

7.5

1.5

6.5

PLZ

OEA or OEB to An, Bn

Set-up Time, HIGH or LOW

2.5

An, Bn to CPA, CPB

Hold Time, HIGH or LOW

1.5

An, Bn to CPA, CPB

Set-up Time, HIGH or LOW

CEA, CEB to CPA, CPB

Hold Time, HIGH or LOW

CEA, CEB to CPA, CPB

Clock Pulse Width HIGH or LOW

(3)

NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not tested.

INDUSTRIAL TEMPERATURE RANGE

IDT29FCT2052AT/BT/CT
FAST CMOS OCTAL REGISTERED TRANSCEIVER

Pulse

G enerator

D.U.T.

OU T

50pF

500

7.0V

3V
1.5V
0V

DATA

IN PUT

TIM ING

INPUT

ASYNC HR O NOU S C ON TROL

PRES ET

C LEAR

ETC.

SYN CH RON OUS C ONTR OL

S U

RE M

S U

H IGH-LOW -HIG H

PULSE

LOW -H IGH -LOW

PULSE

1.5V

SAM E PH ASE

IN PU T TR AN SITION

1.5V

O H

PL H

O UTPUT

OPPOSITE PH ASE

IN PU T TR AN SITION

1.5V

P LH

P H L

O L

C ONTR OL

INPU T

1.5V

3.5V

OUTPU T

N ORM A LLY

LOW

OUTPU T

N ORM A LLY

H IGH

SW ITCH
CLO SE D

SW ITC H
OPEN

O L

0.3V

PLZ

PZL

P ZH

PH Z

3.5V

1.5V

EN AB LE

DISA BLE

O H

PRES ET

C LEAR

CLOCK ENABLE

ETC.

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; t

2.5ns; t

2.5ns.

Test

Switch

Open Drain

Disable Low

Closed

Enable Low

All Other Tests

Open

SWITCH POSITION

DEFINITIONS:
C

= Load capacitance: includes jig and probe capacitance.

= Termination resistance: should be equal to Z

OUT

of the Pulse Generator.

Part Number 29FCT2052T