IDT74FCT162H245AT/CT
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
FAST CMOS 16-BIT
BIDIRECTIONAL
TRANSCEIVER
IDT74FCT162H245AT/CT
FEATURES:
DESCRIPTION:
•
•
•
•
•
The FCT162H245T 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 FCT162H245T has "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.
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)
• Bus Hold retains last active bus state during 3-state
• Eliminates the need for external pull up resistors
• Available in SSOP and TSSOP packages
FUNCTIONAL BLOCK DIAGRAM
1 DIR
2 DIR
1OE
2OE
1A1
2A1
1B1
2B1
1A2
2A2
1B2
2B2
1A3
2A3
1B3
2B3
1A4
2A4
1B4
2B4
1A5
2A5
1B5
2B5
1A6
2A6
1B6
2B6
1A7
2A7
1B7
2B7
1A8
2A8
1B8
2B8
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
SEPTEMBER 2009
1
© 2009 Integrated Device Technology, Inc.
DSC-5459/6
IDT74FCT162H245AT/CT
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
Symbol
Description
VTERM(2) Terminal Voltage with Respect to GND
1DIR
1
48
1OE
1B1
2
47
1A1
1B2
3
46
1A2
GND
4
45
GND
1B3
5
44
1A3
1B4
6
43
1A4
VCC
7
42
VCC
1B5
8
41
1A5
1B6
9
40
1A6
10
39
GND
GND
1B7
11
38
1A7
1B8
12
37
1A8
2B1
13
36
2A1
2B2
14
35
2A2
GND
15
34
GND
2B3
16
33
2A3
2B4
17
32
2A4
VCC
18
31
VCC
2B5
19
30
2A5
2B6
20
29
2A6
GND
21
28
GND
2B7
22
27
2A7
2B8
23
26
2A8
2DIR
24
25
2OE
Max
Unit
–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
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 FCT166XXT (A-Port) Output and
I/O terminals.
3. Output and I/O terminals for FCT162XXXT and FCT166XXXT (A-Port).
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Parameter(1)
Symbol
Conditions
Typ.
Max.
Unit
CIN
Input Capacitance
VIN = 0V
3.5
6
pF
COUT
Output Capacitance
VOUT = 0V
3.5
8
pF
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names
xOE
xDIR
xAx
xBx
Description
Outputs Enable Input (Active LOW)
Direction Control Inputs
Side A Inputs or 3-State Outputs(1)
Side B Inputs or 3-State Outputs(1)
NOTE:
1. These pins have “Bus-hold”. All other pins are standard inputs, outputs, or I/Os.
FUNCTION TABLE(1)
Inputs
xOE
L
L
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
SSOP/ TSSOP
TOP VIEW
2
xDIR
L
H
X
Output
Bus B Data to Bus A
Bus A Data to Bus B
High Z State
IDT74FCT162H245AT/CT
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±10%
Symbol
Test Conditions(1)
Parameter
Typ.(2)
Max.
Unit
2
—
—
V
VIH
Input HIGH Level
VIL
Input LOW Level
IIH
Input
Standard Input(5)
HIGH
Standard I/O(5)
Current(4)
Bus-hold Input
—
—
±100
Bus-hold I/O
—
—
±100
—
—
±1
—
—
±1
IIL
Guaranteed Logic HIGH Level
Min.
Guaranteed Logic LOW Level
—
—
0.8
V
VCC = Max.
—
—
±1
µA
—
—
±1
VI = VCC
Input
Standard Input(5)
LOW
Standard I/O(5)
Current(4)
Bus-hold Input
—
—
±100
Bus-hold I/O
—
—
±100
VI = 2V
–50
—
—
VI = 0.8V
50
—
—
VO = 2.7V
—
—
±1
VO = 0.5V
—
—
±1
—
–0.7
–1.2
V
–80
–140
–250
mA
—
100
—
mV
—
5
500
µA
Typ.(2)
Max.
Unit
IBHH
Bus-hold Sustain
IBHL
Current(4)
Bus-hold Input
IOZH
High Impedance Output Current
IOZL
(3-State Output pins)(5, 6)
VIK
Clamp Diode Voltage
IOS
Short Circuit Current
VH
Input Hysteresis
ICCL
Quiescent Power Supply Current
VI = GND
VCC = Min.
VCC = Max.
VCC = Min., IIN = –18mA
VCC = Max., VO =
GND(3)
—
VCC = Max.
µA
µA
VIN = GND or VCC
ICCH
ICCZ
OUTPUT DRIVE CHARACTERISTICS
Symbol
Test Conditions(1)
Parameter
1.5V(3)
Min.
IODL
Output LOW Current
VCC = 5V, VIN = VIH or VIL, VO =
60
115
200
mA
IODH
Output HIGH Current
VCC = 5V, VIN = VIH or VIL, VO = 1.5V(3)
–60
–115
–200
mA
VOH
Output HIGH Voltage
VCC = Min.
IOH = –24mA
2.4
3.3
—
V
IOH = 24mA
—
0.3
0.55
V
VIN = VIH or VIL
VOL
Output LOW Voltage
VCC = Min.
VIN = VIH or VIL
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 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 TA = –55°C.
6. Does not include Bus-hold I/O pins.
3
IDT74FCT162H245AT/CT
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol
Test Conditions(1)
Parameter
Min.
Typ.(2)
Max.
Unit
—
0.5
1.5
mA
ΔICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = 3.4V(3)
ICCD
Dynamic Power Supply
Current(4)
VCC = Max.
Outputs Open
xOE = xDIR = GND
One Input Toggling
50% Duty Cycle
VIN = VCC
VIN = GND
—
60
100
µA/
MHz
IC
Total Power Supply Current(6)
VCC = Max.
Outputs Open
fi = 10MHz
VIN = VCC
VIN = GND
—
0.6
1.5
mA
50% Duty Cycle
xOE = xDIR = GND
One Bit Toggling
VIN = 3.4V
VIN = GND
—
0.9
2.3
VCC = Max.
Outputs Open
fi = 2.5MHz
VIN = VCC
VIN = GND
—
2.4
4.5(5)
50% Duty Cycle
xOE = xDIR = GND
Sixteen Bits Toggling
VIN = 3.4V
VIN = GND
—
6.4
16.5(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 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
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT162H245AT
Symbol
Parameter
FCT162H245CT
Condition(1)
Min.(2)
Max.
Min.(2)
Max.
Unit
CL = 50pF
RL = 500Ω
1.5
4.6
1.5
3.5
ns
tPLH
tPHL
Propagation Delay
A to B, B to A
tPZH
tPZL
Output Enable Time
xOE to A or B
1.5
6.2
1.5
4.4
ns
tPHZ
tPLZ
Output Disable Time
xOE to A or B
1.5
5
1.5
4
ns
tPZH
tPZL
Output Enable Time
xDIR to A or B(3)
1.5
6.2
1.5
4.8
ns
tPHZ
tPLZ
Output Disable Time
xDIR to A or B(3)
1.5
5
1.5
4
ns
tSK(o)
Output Skew(4)
—
0.5
—
0.5
ns
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.
4. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
4
IDT74FCT162H245AT/CT
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
V CC
SWITCH POSITION
7.0V
500Ω
V OUT
VIN
Pulse
Generator
D.U.T.
50pF
RT
500Ω
CL
Test
Switch
Open Drain
Disable Low
Enable Low
Closed
All Other Tests
Open
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
Test Circuits for All Outputs
DATA
INPUT
tH
tSU
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
tREM
tSU
3V
1.5V
0V
3V
1.5V
0V
LOW-HIGH-LOW
PULSE
tW
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
3V
1.5V
0V
tH
1.5V
1.5V
Pulse Width
Set-up, Hold, and Release Times
ENABLE
SAME PHASE
INPUT TRANSITION
tPLH
tPHL
OUTPUT
tPLH
OPPOSITE PHASE
INPUT TRANSITION
tPHL
3V
1.5V
0V
VOH
1.5V
VOL
DISABLE
3V
1.5V
0V
CONTROL
INPUT
tPZL
OUTPUT
NORMALLY
LOW
3V
1.5V
0V
SWITCH
CLOSED
tPLZ
3.5V
1.5V
tPZH
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
3.5V
0.3V
VOL
tPHZ
0.3V
VOH
1.5V
0V
0V
Propagation Delay
Enable and Disable Times
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.
5
IDT74FCT162H245AT/CT
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
XX
Temp. Range
FCT XXX
Drive
X
XXXX
Bus Hold
Device Type
XX
Package
PVG
PAG
Shrink Small Outline Package - Green
Thin Shrink Small Outline Package - Green
245AT
245CT
16-Bit Bidirectional Transceiver
H
Bus-Hold
162
Double-Density, 5 Volt, Balanced Drive
74
40 C to +85 C
Datasheet Document History
09/10/09 Pg.6
Updated the ordering information by removing the "IDT" notation and non RoHS part.
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6
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