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IDT54/74FCT16245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER MILITARY AND INDUSTRIAL TEMPERATURE RANGES
JANUARY 2009
IDT54/74FCT16245T/AT/CT/ET
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
FAST CMOS 16-BIT
BIDIRECTIONAL
TRANSCEIVER
DESCRIPTION:
The FCT16245T 16-bit transceiver is 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 is 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.
1
DIR
1
OE
1
A
1
1
A
2
1
A
3
1
A
4
1
A
5
1
A
6
1
A
7
1
A
8
1
B
1
1
B
2
1
B
3
1
B
4
1
B
5
1
B
6
1
B
7
1
B
8
2
DIR
2
OE
2
A
1
2
A
2
2
A
3
2
A
4
2
A
5
2
A
6
2
A
7
2
A
8
2
B
1
2
B
2
2
B
3
2
B
4
2
B
5
2
B
6
2
B
7
2
B
8
IDT and the IDT logo are registered trademark of Integrated Device Technology, Inc.
© 2009 Integrated Device Technology, Inc. DSC-5456/9
FUNCTIONAL BLOCK DIAGRAM
FEATURES:
• 0.5 MICRON CMOS Technology
• High-speed, low-power CMOS replacement for ABT functions
• Typical tSK(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)
• 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
• Available in the following packages:
– Industrial: SSOP, TSSOP
– Military: CERPACK
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MILITARY AND INDUSTRIAL TEMPERATURE RANGES
IDT54/74FCT16245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
SSOP/ TSSOP CERPACK
TOP VIEW
PIN CONFIGURATION
1
DIR
1
B
1
GND
1
B
3
V
CC
GND
2
B
2
GND
V
CC
GND
1
B
2
1
B
4
1
B
5
1
B
6
1
B
7
1
B
8
2
B
1
2
B
3
2
B
4
2
B
5
2
B
7
2
B
8
2
B
6
2
DIR
1
A
1
1
A
2
GND
1
A
3
1
A
4
V
CC
1
A
5
1
A
6
1
A
7
1
A
8
2
A
1
2
A
2
2
A
3
2
A
4
V
CC
2
A
5
2
A
7
2
A
8
2
A
6
GND
GND
GND
2
OE
1
OE
39
29
30
31
32
33
34
35
36
37
38
25
26
27
28
48
47
41
42
43
44
45
46
40
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
20
11
21
22
23
24
Symbol Description Max Unit
VTERM(2) Terminal Voltage with Respect to GND –0.5 to +7 V
VTERM(3) Terminal Voltage with Respect to GND –0.5 to VCC+0.5 V
TSTG Storage Temperature –65 to +150 °C
IOUT DC Output Current –60 to +120 mA
ABSOLUTE MAXIMUM RATINGS(1)(1)
(1)(1)
(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.
2. All device terminals except FCT162XXXT and FCT166XXXT (APort) Output and
I/O terminals.
3. Output and I/O terminals terminals for FCT162XXX and FCT166XXXT (A-Port).
Symbol Parameter(1) Conditions Typ. Max. Unit
CIN Input Capacitance VIN = 0V 3.5 6 pF
COUT Output Capacitance VOUT = 0V 3.5 8 pF
CAPACITANCE (TA = +25°C, F = 1.0MHz)
NOTE:
1. This parameter is measured at characterization but not tested.
Pin Names Description
xOE Output Enable Inputs (Active LOW)
xDIR Direction Control Inputs
xAx Side A Inputs or 3-State Outputs
xBx Side B Inputs or 3-State Outputs
PIN DESCRIPTION
NOTE:
1 . H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
Inputs
xOE xDIR Outputs
L L Bus B Data to Bus A
L H Bus A Data to Bus B
H X High Z State
FUNCTION TABLE(1)
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IDT54/74FCT16245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER MILITARY AND INDUSTRIAL TEMPERATURE RANGES
Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit
VIH Input HIGH Level Guaranteed Logic HIGH Level 2 — — V
VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V
IIH Input HIGH Current (Input pins)(5) VCC = Max. VI = VCC ——±1µA
Input HIGH Current (I/O pins)(5) ——±1
IIL Input LOW Current (Input pins)(5) VI = GND — — ±1
Input LOW Current (I/O pins)(5) ——±1
IOZH High Impedance Output Current VCC = Max. VO = 2.7V — — ±1µA
IOZL (3-State Output pins)(5) VO = 0.5V — — ±1
VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — –0.7 –1.2 V
IOS Short Circuit Current VCC = Max., VO = GND(3) –80 –140 –250 mA
VHInput Hysteresis — — 100 — m V
ICCL Quiescent Power Supply Current VCC = Max. — 5 500 µA
ICCH VIN = GND or VCC
ICCZ
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±10%; Military: TA = –55°C to +125°C, VCC = 5.0V ±10%
OUTPUT DRIVE CHARACTERISTICS
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 VCC = 5.0V, +25°C ambient.
3. Not more than one output should be shorted 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 TA = –55°C.
Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit
IOOutput Drive Current VCC = Max., VO = 2.5V(3) –50 — –180 mA
VOH Output HIGH Voltage VCC = Min. IOH = –3mA, –2.5 3.5 — V
VIN = VIH or VIL IOH = –12mA MIL 2.4 3.5 — V
IOH = –15mA IND
IOH = –24mA MIL 2 3 — V
IOH = –32mA IND(4)
VOL Output LOW Voltage VCC = Min. IOL = 48mA MIL — 0.2 0.55 V
VIN = VIH or VIL IOL = 64mA IND
IOFF Input/Output Power Off Leakage(5) VCC = 0V, VIN or VO ≤ 4.5V — — ±1 μA
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MILITARY AND INDUSTRIAL TEMPERATURE RANGES
IDT54/74FCT16245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit
ΔICC Quiescent Power Supply Current VCC = Max. — 0.5 1.5 mA
TTL Inputs HIGH VIN = 3.4V(3)
ICCD Dynamic Power Supply VCC = Max. VIN = VCC — 60 100 µA/
Current(4) Outputs Open VIN = GND M Hz
xOE = xDIR = GND
One Input Togging
50% Duty Cycle
ICTotal Power Supply Current(6) VCC = Max. VIN = VCC — 0.6 1.5 mA
Outputs Open VIN = GND
fi = 10MHz
50% Duty Cycle VIN = 3.4V — 0.9 2.3
xOE = xDIR = GND VIN = GND
One Bit Toggling
VCC = Max. VIN = VCC — 2.4 4.5(5)
Outputs Open VIN = GND
fi = 2.5MHz
50% Duty Cycle
xOE = xDIR = GND VIN = 3.4V — 6.4 16.5(5)
Sixteen BitsTogging VIN = GND
POWER SUPPLY CHARACTERISTICS
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 VCC = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 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. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ΔICC DHNT + ICCD (fCPNCP/2 + fiNi)
ICC = Quiescent Current (ICCL, ICCH and ICCZ)
ΔICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current caused by an Input Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
NCP = Number of Clock Inputs at fCP
fi = Input Frequency
Ni = Number of Inputs at fi
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IDT54/74FCT16245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER MILITARY AND INDUSTRIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE - INDUSTRIAL
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 limit is guaranteed but not tested.
74FCT16245AT 74FCT16245CT 74FCT16245ET
Symbol Parameter Condition(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
tPLH Propagation Delay CL = 50pF 1.5 4.6 1.5 4.1 1.5 3.2 ns
tPHL A to B, B to A RL= 500Ω
tPZH Output Enable Time 1.5 6.2 1.5 5.8 1.5 4.4 ns
tPZL xOE to A or B
tPHZ Output Disable Time 1.5 5 1.5 4.8 1.5 4 ns
tPLZ xOE to A or B
tPZH Output Enable Time 1.5 6.2 1.5 5.8 1.5 4.8 ns
tPZL xDIR to A or B(4)
tPHZ Output Disable Time 1.5 5 1.5 4.8 1.5 4 ns
tPZL xDIR to A or B(4)
tSK(o) Output Skew(3) — 0.5 — 0.5 — 0.5 ns
54FCT16245T 54FCT16245AT 54FCT16245CT
Symbol Parameter Condition(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
tPLH Propagation Delay CL = 50pF 1.5 7.5 1.5 4.9 1.5 4.5 ns
tPHL A to B, B to A RL= 500Ω
tPZH Output Enable Time 1.5 10 1.5 6.5 1.5 6.2 ns
tPZL xOE to A or B
tPHZ Output Disable Time 1.5 10 1.5 6 1.5 5.2 ns
tPLZ xOE to A or B
tPZH Output Enable Time 1.5 10 1.5 6.5 1.5 6.2 ns
tPZL xDIR to A or B(4)
tPHZ Output Disable Time 1.5 10 1.5 6 1.5 5.2 ns
tPZL xDIR to A or B(4)
tSK(o) Output Skew(3) — 0.5 — 0.5 — 0.5 ns
SWITCHING CHARACTERISTICS OVER OPERATING RANGE - MILITARY
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MILITARY AND INDUSTRIAL TEMPERATURE RANGES
IDT54/74FCT16245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
Pulse
Generator
RT
D.U.T.
VCC
VIN
CL
VOUT
50pF 500Ω
500Ω
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
tSU tH
tREM
tSU tH
PRESET
CLEAR
CLOCK ENABLE
ETC.
HIGH-LOW-HIGH
PULSE
LOW-HIGH-LOW
PULSE
tW
1.5V
1.5V
SAME PHASE
INPUT TRANSITION
3V
1.5V
0V
1.5V
VOH
tPLH
OUTPUT
OPPOSITE PHASE
INPUT TRANSITION
3V
1.5V
0V
tPLH tPHL
tPHL
VOL
CONTROL
INPUT
3V
1.5V
0V
3.5V
0V
OUTPUT
NORMALLY
LOW
OUTPUT
NORMALLY
HIGH
SWITCH
CLOSED
SWITCH
OPEN
VOL
0.3V
0.3V
tPLZtPZL
tPZH tPHZ
3.5V
0V
1.5V
1.5V
ENABLE DISABLE
VOH
TEST CIRCUITS AND WAVEFORMS
Propagation Delay
Test Circuits for All Outputs
Enable and Disable Times
Set-up, Hold, and Release Times
Pulse Width
Test Switch
Open Drain
Disable Low Closed
Enable Low
All Other Tests Open
SWITCH POSITION
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.
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IDT54/74FCT16245T/AT/CT/ET
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER MILITARY AND INDUSTRIAL TEMPERATURE RANGES
ORDERING INFORMATION
XX
Temp. Range
XXXX
Device Type
XX
Package
X
Process
PVG
PAG
Industrial Options
Shrink Small Outline Package - Green
Thin Shrink Small Outline Package - Green
16-Bit Bidirectional Transceiver
54
74 55C to +125C
40C to +85C
16 Double-Density, 5 Volt, Balanced Drive
E
Military Options
CERPACK
Blank
B
Industrial
MIL-STD-883, Class B
FCT XXX
Family
245T
245AT
245CT
245ET
CORPORATE HEADQUARTERS for SALES: for Tech Support:
6024 Silver Creek Valley Road 800-345-7015 or 408-284-8200 logichelp@idt.com
San Jose, CA 95138 fax: 408-284-2775
www.idt.com
Datasheet Document History
01/08/09 Pg. 7 Updated the ordering information by removing the "IDT" notation and non RoHS part.
