Datasheet IDT74FCT16H245ATPFB, IDT74FCT16H245ATPF, IDT74FCT16H245ATPAB, IDT74FCT16H245ATPA, IDT74FCT16H245ATEB Datasheet (Integrated Device Technology)

Integrated Device Technology, Inc.

FAST CMOS 16-BIT
BIDIRECTIONAL
TRANSCEIVERS

IDT54/74FCT16245T/AT/CT/ET

IDT54/74FCT162245T/AT/CT/ET

IDT54/74FCT166245T/AT/CT

IDT54/74FCT162H245T/AT/CT/ET

FEATURES:

• Common features:

– 0.5 MICRON CMOS Technology

– High-speed, low-power CMOS replacement for

ABT functions

– Typical t

SK(o) (Output Skew) < 250ps

– Low input and output leakage ≤ 1µA (max.)

– ESD > 2000V per MIL-STD-883, Method 3015;

> 200V using machine model (C = 200pF, R = 0)

– Packages include 25 mil pitch SSOP, 19.6 mil pitch

TSSOP, 15.7 mil pitch TVSOP and 25 mil pitch Cerpack

– Extended commercial range of -40°C to +85°C

• Features for FCT16245T/AT/CT/ET:

– High drive outputs (-32mA IOH, 64mA IOL)
– Power off disable outputs permit “live insertion”
– Typical VOLP (Output Ground Bounce) < 1.0V at

VCC = 5V, TA = 25°C

• Features for FCT162245T/AT/CT/ET:

– Balanced Output Drivers: ±24mA (commercial),

±16mA (military)

– Reduced system switching noise
– Typical VOLP (Output Ground Bounce) < 0.6V at

VCC = 5V,TA = 25°C

FUNCTIONAL BLOCK DIAGRAM

DESCRIPTION:

The 16-bit transceivers are built using advanced dual metal
CMOS technology. These high-speed, low-power transceiv­ers are ideal for synchronous communication between two
busses (A and B). The Direction and Output Enable controls
operate these devices as either two independent 8-bit trans­ceivers or one 16-bit transceiver. The direction control pin
(xDIR) controls the direction of data flow. The output enable
pin (xOE) overrides the direction control and disables both

ports. All inputs are designed with hysteresis for improved
noise margin.

The FCT16245T are ideally suited for driving high-capaci­tance loads and low-impedance backplanes. The output buff­ers are designed with power off disable capability to allow "live
insertion" of boards when used as backplane drivers.

The FCT162245T have balanced output drive with current
limiting resistors. This offers low ground bounce, minimal
undershoot, and controlled output fall times– reducing the
need for external series terminating resistors. The
FCT162245T are plug-in replacements for the FCT16245T
and ABT16245 for on-board interface applications.

The FCT166245T are suited for very low noise, point-to­point driving where there is a single receiver, or a light lumped

1 DIR

1A1

A2

1

A3

1

1

A4

A5

1

A6

1

1

A7

1

A8

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

1OE

1

B1

B2

1

B3

1

1

B4

B5

1

1

B6

1

B7

1

B8

2545 drw 01

2

DIR

2A1

A

2

2

A

2

A

2

A

A

2

2

A

A

2

2

OE

2

B

1

2

2

B

2

3

2

B

3

4

B

4

2

5

2

B

5

6

2

B

6

7

B

7

2

8

B

8

2

2545 drw 02

MILITARY AND COMMERCIAL TEMPERATURE RANGES AUGUST 1996

1996 Integrated Device Technology, Inc. 5.3 DSC-2545/9

1

IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES

FEATURES: (Cont'd.)

• Features for FCT166245T/AT/CT:

– Light Drive A Port: ±8mA (commercial),

±6mA (military)

– High Drive B Port: +64mA, –32mA (commercial),

+48mA, –24mA (military)
– Minimal system switching noise
– Typical VOLP (Output Ground Bounce) < 0.25V at

VCC = 5V,TA = 25°C (A Port Switching)

• Features for FCT162H245T/AT/CT/ET:

– Bus Hold retains last active bus state during 3-state
– Eliminates the need for external pull up resistors

PIN CONFIGURATIONS

1

DIR

1B1

1B2

GND

1B3

1

B

V

CC

1

B

1

B

GND

4

5

6

1
2
3
4
5
6
7
8
9
10

48
47
46
45
44
43
42
41

40

39

1

OE

1A1

1

A

2

GND

1A3

1

A

4

V

CC

1

A

5

1

A

6

GND

1DIR

1B1
1B2

GND

1B3

B4

1

VCC

B5

1

1

B6

GND

DESCRIPTION: (Cont'd.)

load (<100pF). The buffers are designed to limit the output
current to levels which will avoid noise and ringing on the
signal lines without using external series terminating resis­tors. These parts have a ±8mA driver on the "A" Port and a
+64/–32mA driver on the "B" Port, making them ideal for
interfacing noisy system busses to noise sensitive interfaces.

The FCT162H245T have "Bus Hold" which retains the
input's last state whenever the input goes to high impedance.
This prevents "floating" inputs and eliminates the need for
pull-up/down resistors.

1
2
3
4
5
6
7
8
9
10

48
47
46
45
44
43
42
41

40

39

1OE
1A1

1

A2

GND

1A3

1

A4

VCC

1

A5

1

A6

GND

1

B

1

B

2

B

2B2

GND

2

B
B

2

V

CC

2

B
B

2

GND

2

B

2

B

2

DIR

1

7

8

11
12

SO48-1

38
37

1

A

7

1

A

8

SO48-2

1

3

4

5

6

7

8

13
14
15
16
17
18
19
20
21
22
23
24

SO48-3

36

35

34
33
32
31
30
29
28
27
26
25

2

A

1

2

A

2

GND

2

A

3

A

4

2

V

CC

2

A

5

A

6

2

GND

2

A

7

2

A

8

2

OE

2545 drw 03

B7

1

B8

2

B1

2B2

GND

B3

2

B4

2

CC

V

B5

2

2

B6

GND

B7

2

2

B8

DIR

2

SSOP/

TSSOP/TVSOP

TOP VIEW

11
12
13
14
15
16
17
18
19
20
21
22
23
24

CERPACK
TOP VIEW

E48-1

38
37
36

35

34
33
32
31
30
29
28
27
26
25

2545 drw 04

1

A7

1

A8

2

A1

2

A2

GND

A3

2

A4

2

VCC

2

A5

2

A6

GND

A7

2

2

A8

2OE

5.3 2

IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES

PIN DESCRIPTION

Pin Names Description

x

OE

xDIR Direction Control Input

xAx Side A Inputs or 3-State Outputs
xBx Side B Inputs or 3-State Outputs

NOTES:

1. On FCT162H245T these pins have “Bus Hold”. All other pins are standard
inputs, outputs or I/Os.

2. On FCT166245T this is the ±8mA Port.

3. On FCT166245T this is the +64/–32mA Port.

ABSOLUTE MAXIMUM RATINGS

Symbol Description Max. Unit

(2)

VTERM

(3)

VTERM

TSTG Storage Temperature –65 to +150 °C
IOUT DC Output Current –60 to +120 mA

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.

2. All device terminals except FCT162XXXT and FCT166XXXT (A-Port)
Output and I/O terminals.

3. Output and I/O terminals for FCT162XXXT and FCT166XXXT (A-Port).

Output Enable Input (Active LOW)

Terminal Voltage with Respect to
GND
Terminal Voltage with Respect to
GND

(1,2)
(1,3)

2545 tbl 01

(1)

–0.5 to +7.0 V

–0.5 to

CC +0.5

V

2545 lnk 03

V

FUNCTION TABLE

(1)

Inputs

x

OE

OE

xDIR Outputs

L L Bus B Data to Bus A
L H Bus A Data to Bus B

H X High Z State

NOTE:

1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High Impedance

CAPACITANCE (TA = +25°C, f = 1.0MHz)

Symbol Parameter

CIN Input

Capacitance

CI/O I/O

Capacitance

NOTE:

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

(1)

Conditions Typ. Max. Unit

VIN = 0V 3.5 6.0 pF

VOUT = 0V 3.5 8.0 pF

2545 tbl 02

2545 lnk 04

5.3 3

IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (STANDARD PARTS)

Following Conditions Apply Unless Otherwise Specified:
Commercial: T

Symbol Parameter Test Conditions

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 (Input pins)

II L Input LOW Current (Input pins)

IOZH High Impedance Output Current VCC = Max. VO = 2.7V — — ±1 µA
IOZL (3-State Output pins)
VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — –0.7 –1.2 V
IOS Short Circuit Current VCC = Max., VO = GND
VH Input Hysteresis — — 100 — mV
ICCL

ICCH
ICCZ

A =–40°C to +85°C, VCC = 5.0V ± 10%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%

Input HIGH Current (I/O pins)

Input LOW Current (I/O pins)

(5)

(1)

(5)

VCC = Max. VI = VCC — — ±1 µA

(5)

(5)

VI = GND — — ±1

(5)

Min. Typ.

— — ±1

— — ±1

VO = 0.5V — — ±1

(3)

–80 –140 –225 mA

(2)

Max. Unit

Quiescent Power Supply Current VCC = Max., VIN = GND or VCC — 5 500 µA

2545 lnk 05

OUTPUT DRIVE CHARACTERISTICS FOR FCT16245T AND FCT166245T (B-PORT)

Symbol Parameter Test Conditions

IO Output Drive Current VCC = Max., VO = 2.5V

(3)

(1)

Min. Typ.

–50 —–180 mA

VOH Output HIGH Voltage VCC = Min. IOH = –3mA 2.5 3.5 — V

VIN = VIH or VIL IOH = –12mA MIL.

VOL Output LOW Voltage VCC = Min.

IN = VIH or VIL

V

IOFF Input/Output Power Off Leakage

(5)

VCC = 0V, VIN or VO ≤ 4.5V — — ±1 µA

OH = –15mA COM'L.

I
IOH = –24mA MIL.

OH = –32mA COM'L.

I
IOL = 48mA MIL.

OL = 64mA COM'L.

I

2.4 3.5 — V

2.0 3.0 — V

(4)

— 0.2 0.55 V

(2)

Max. Unit

2545 lnk 06

OUTPUT DRIVE CHARACTERISTICS FOR FCT162245T

Symbol Parameter Test Conditions

I

ODL

I

ODH

V

V

OH

OL

Output LOW Current VCC = 5V, V
Output HIGH Current VCC = 5V, V
Output HIGH Voltage VCC = Min.

IN

= V

IH

V

or V

Output LOW Voltage VCC = Min.

IN

= V

IH

V

or V

IN

= V

IH or VIL, VOUT

IN

= V

IH

IL

IL

or V

IL,

V

OUT

IOH = –16mA MIL.

OH

= –24mA COM'L.

I
IOL = 16mA MIL.

OL

= 24mA COM'L.

I

(1)

= 1.5V
= 1.5V

(3)

(3)

Min. Typ.

60 115 200 mA

–60 –115 –200 mA

2.4 3.3 — V

— 0.3 0.55 V

(2)

Max. Unit

2545 lnk 07

OUTPUT DRIVE CHARACTERISTICS FOR FCT166245T (A-PORT ONLY)

Symbol Parameter Test Conditions

I

ODL

I

ODH

V

OH

V

OL

NOTES:

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.

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

4. Duration of the condition can not exceed one second.

5. The test limit for this parameter is ± 5µA at T

Output LOW Current VCC = 5V, V
Output HIGH Current VCC = 5V, V
Output HIGH Voltage VCC = Min.

IN

= V

IH

V

or V

Output LOW Voltage VCC = Min.

IN

= V

IH

V

or V

ADVANCE INFORMATION

A = –55°C.

IN

= V

IH or VIL, VOUT

IN

= V

IH

IL

IL

or V

IL,VOUT

(1)

(3)

= 1.5V

(3)

= 1.5V

IOH = –6mA MIL.

OH

= –8mA COM'L.

I
IOL = 6mA MIL.

OL

= 8mA COM'L.

I

Min. Typ.

16 48 96 mA

–16 –48 –96 mA

2.4 3.3 — V

— 0.3 0.55 V

(2)

Max. Unit

2545 lnk 08

5.3 4

IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (BUS HOLD)

Following Conditions Apply Unless Otherwise Specified:
Commercial: T

Symbol Parameter Test Conditions

V

IH

V

IL

I

I H

I

I L

I

BHH

I

BHL

I

OZH

I

OZL

V

IK

I

OS

V

H

I

CCL

I

CCH

I

CCZ

NOTES:

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.

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

4. Pins with Bus Hold are identified in the pin description.

5. The test limit for this parameter is ± 5µA at T

6. Does not include Bus Hold I/O pins.

A =–40°C to +85°C, VCC = 5.0V ± 10%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%

(1)

Min. Typ.

Input HIGH Level Guaranteed Logic HIGH Level 2.0 —

(2)

Max. Unit

—

Input LOW Level Guaranteed Logic LOW Level — — 0.8 V
Input Standard Input
HIGH Standard I/O

(4)

Current

Bus Hold Input — —

Bus Hold I/O — —
Input Standard Input
LOW Standard I/O

(4)

Current

Bus Hold Input — —

Bus Hold I/O — —

(5)

(5)

(5)

(5)

——

VCC = Max. VI = V

VI = GND — —

CC

——
——

±

1

±

1

±

100

±

100

±

1

±

1

±

100

±

100
Bus Hold Bus Hold Input VCC = Min. VI = 2.0V –50 — —
Sustain

(4)

Current
High Impedance Output Current VCC = Max. VO = 2.7V —

(3-State Output pins)
Clamp Diode Voltage VCC = Min., I

(5,6)

IN

= –18mA —
Short Circuit Current VCC = Max., VO = GND
Input Hysteresis

—

Quiescent Power Supply Current VCC = Max., VIN = GND or V

A = –55°C.

I

= 0.8V +50 — —

V

—

VO = 0.5V —

(3)

–80–140–225 mA

–

—

0.7

— 100

CC

— 5 500

±

1

±

1

–

1.2 V

—

2545 lnk 09

V

µ

A

µ

A

µ

A

mV

µ

A

5.3 5

IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES

POWER SUPPLY CHARACTERISTICS

Symbol Parameter Test Conditions

CC Quiescent Power Supply Current Vcc = Max. — 0.5 1.5 mA

∆I

TTL Inputs HIGH V

ICCD Dynamic Power Supply Current

IN = 3.4V

(4)

Vcc = Max. VIN = VCC — 60 100 µA/

(3)

Outputs Open V

(1)

IN = GND MHz

Min. Typ.

xOE = xDIR = GND
One Input Toggling
50% Duty Cycle

I

C Total Power Supply Current

(6)

Vcc = Max. VIN = VCC — 0.6 1.5 mA
Outputs Open V
f

i = 10MHz

50% Duty Cycle V
xOE = xDIR = GND V

IN = GND
IN = 3.4V — 0.9 2.3

IN = GND

One Bit Toggling
Vcc = Max. V

IN = VCC — 2.4 4.5

Outputs Open VIN = GND
f

i = 2.5MHz

50% Duty Cycle V

IN = 3.4V — 6.4 16.5

xOE = xDIR = GND VIN = GND
Sixteen Bits Toggling

NOTES:

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

3. Per TTL driven input (V

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

C = IQUIESCENT + IINPUTS + IDYNAMIC

6. I
IC = ICC + ∆ICC DHNT + ICCD (fCPNCP/2 + fiNi)

CC = Quiescent Current (ICCL, ICCH and ICCZ)

I

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

∆I

H = Duty Cycle for TTL Inputs High

D

T = Number of TTL Inputs at DH

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

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

CP = Number of Clock Inputs at fCP

N
fi = Input Frequency

i = Number of Inputs at fi

N

CC = 5.0V, +25°C ambient.

IN = 3.4V). All other inputs at VCC or GND.

CC formula. These limits are guaranteed but not tested.

(2)

Max. Unit

(5)

(5)

2545 tbl 10

5.3 6

IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

FCT16245T/162245T

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

Symbol Parameter Condition

tPLH

Propagation Delay

tPHL

A to B, B to A

tPZH

Output Enable Time

tPZL

xOE to A or B

tPHZ

Output Disable Time

tPLZ

xOE to A or B

tPZH

Output Enable Time

tPZL

xDIR to A or B

tPHZ

Output Disable Time

tPLZ

xDIR to A or B

tSK(o) Output Skew

Symbol Parameter Condition

tPLH

Propagation Delay
A to B, B to A

tPHL
tPZH

Output Enable Time
xOE to A or B

tPZL
tPHZ

Output Disable Time
xOE to A or B

tPLZ
tPZH

Output Enable Time
xDIR to A or B

tPZL
tPHZ

Output Disable Time
xDIR to A or B

tPLZ
tSK(o) Output Skew

NOTES:

1. See test circuit and waveforms.

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

3. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.

4. This parameter is guaranteed but not tested.

5. Including parts with Bus Hold.

(4)

(4)

(3)

(4)

(4)

(3)

CL = 50pF

R

CL = 50pF

R

(1)

L = 500Ω

(1)

L = 500Ω

(2)

Min.

Max. Min.

1.5 7.0 1.5 7.5 1.5 4.6 1.5 4.9 ns

1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5 ns

1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0 ns

1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5 ns

1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0 ns

— 0.5 — 0.5 — 0.5 — 0.5 ns

FCT16245CT/162245CT
Com'l. Mil. Com'l. Mil.

(2)

Min.

Max. Min.

1.5 4.1 1.5 4.5 1.5 3.2 — — ns

1.5 5.8 1.5 6.2 1.5 4.4 — — ns

1.5 4.8 1.5 5.2 1.5 4.0 — — ns

1.5 5.8 1.5 6.2 1.5 4.8 — — ns

1.5 4.8 1.5 5.2 1.5 4.0 — — ns

— 0.5 — 0.5 — 0.5 — — ns

(5)

(2)

(2)

Max. Min.

(5)

Max. Min.

FCT16245AT/162245AT

(2)

Max. Min.

FCT16245ET/162245ET

(2)

Max. Min.

(2)

(2)

(5)

Max. Unit

2545 tbl 11

(5)

Max. Unit

2545 tbl 12

5.3 7

IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

FCT166245T FCT166245AT FCT166245CT

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

(1)

Symbol Parameter Condition

tPLH

Propagation Delay
A to B

tPHL
tPLH

Propagation Delay
B to A

tPHL
tPZH

Output Enable Time
xOE to B

tPZL

tPZH

Output Enable Time
xOE to A

tPZL

tPHZ

Output Disable Time
xOE to B

tPLZ

tPHZ

Output Disable Time
xOE to A

tPLZ

tPZH

Output Enable Time
xDIR to B

tPZL

tPZH

Output Enable Time
xDIR to A

tPZL

tPHZ

Output Disable Time
xDIR to B

tPLZ

tPHZ

Output Disable Time
xDIR to A

tPLZ

tSK(o) Output Skew

NOTES:

1. See test circuit and waveforms.

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

3. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.

4. This parameter is guaranteed but not tested.

(4)

(4)

(4)

(4)

(3)

ADVANCE INFORMATION

CL = 50pF

R

L = 500Ω

(2)

Min.

Max. Min.

1.5 4.6 1.5 4.9 1.5 4.1 1.5 4.5 ns

1.5 7.0 1.5 7.5 1.5 4.6 1.5 4.9 ns

1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns

1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5 ns

1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns

1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0 ns

1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns

1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5 ns

1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns

1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0 ns

— 0.5 — 0.5 — 0.5 — 0.5 ns

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Unit

2545 tbl 13

5.3 8

IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES

TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS

V

CC

7.0V

SWITCH POSITION

Test Switch

Open Drain
Disable Low

Enable Low

All Other Tests

Generator.

Pulse

Generator

500

Ω

V

V

IN

OUT

D.U.T.

50pF

500

T

R

C

L

Ω

2545 drw 05

DEFINITIONS:

L= Load capacitance: includes jig and probe capacitance.

C

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

R

SET-UP, HOLD AND RELEASE TIMES PULSE WIDTH

DATA

INPUT

TIMING

INPUT

ASYNCHRONOUS CONTROL

PRESET

CLEAR

ETC.

SYNCHRONOUS CONTROL

PRESET

CLEAR

CLOCK ENABLE

ETC.

t

t

REM

t

H

H

t

SU

t

SU

3V

1.5V
0V

3V

1.5V
0V

3V

1.5V
0V

3V

1.5V
0V

2545 drw 06

LOW-HIGH-LOW

PULSE

HIGH-LOW-HIGH

PULSE

Closed

Open

2545 lnk 14

1.5V

t

W

1.5V

2545 drw 07

PROPAGATION DELAY

SAME PHASE

INPUT TRANSITION

t

PLH

OUTPUT

t

OPPOSITE PHASE

INPUT TRANSITION

PLH

t

PHL

t

PHL

3V

1.5V
0V

V

OH

1.5V

V

OL

3V

1.5V
0V

2545 drw 08

ENABLE AND DISABLE TIMES

ENABLE DISABLE

3V

CONTROL

INPUT

t

PHZ

PLZ

t

F ≤ 2.5ns; tR ≤ 2.5ns

t

PZL

OUTPUT

NORMALLY

OUTPUT

NORMALLY

HIGH

NOTES:

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

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

LOW

SWITCH
CLOSED

t

PZH

SWITCH
OPEN

3.5V

1.5V

1.5V
0V

0.3V

0.3V

1.5V
0V

3.5V

V

V

0V

OL

OH

2545 drw 09

5.3 9

IDT54/74FCT16245T/AT/CT/ET, 162245T/AT/CT/ET, IDT54/74FCT166245T/AT/CT, IDT54/74FCT162H245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES

ORDERING INFORMATION

X

IDT XX

Temp. Range

FCT

DriveXBus Hold

XXXX

Device TypeXPackage

X

Process

Blank
B

PV
PA
PF
E

245T
245AT
245CT
245ET

Blank
H

16
162
166

54
74

Commercial
MIL-STD-883, Class B

Shrink Small Outline Package (SO48-1)
Thin Shrink Small Outline Package (SO48-2)
Thin Very Small Outline Package (SO48-3)
CERPACK (E48-1)

Non-Inverting 16-Bit Bidirectional Transceiver

Standard
Bus Hold

16-Bit High Drive
16-Bit Balanced Drive
16-Bit Light Drive

–55°C to +125°C
–40°C to +85°C

2545 drw 10

5.3 10