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1CY74FCT16445T/2
H245T
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
16-Bit Transceivers
SCCS026 - July 1994 - Revised March 2000
Features
Functional Description
• FCT-E speed at 3.2 ns
• Power-off disable outputs permits live insertion
• Edge-rate control circuitry for significantly improved
noise characteristics
• Typical output skew & lt; 250 ps
• ESD & gt; 2000V
• TSSOP (19.6-mil pitch) and SSOP (25-mil pitch)
packages
• Industrial temperature range of –40˚C to +85˚C
• VCC = 5V ± 10%
These 16-bit transceivers are designed for use in bidirectional
synchronous communication between two buses, where high
speed and low power are required. With the exception of the
CY74FCT16245T, these devices can be operated either as
two independent octals or a single 16-bit transceiver. Direction
of data flow is controlled by (DIR), the Output Enable (OE)
transfers data when LOW and isolates the buses when HIGH.
The output buffers are designed with power off disable capability to allow for live insertion of boards.
The CY74FCT16245T is ideally suited for driving
high-capacitance loads and low-impedance backplanes.
CY74FCT16245T Features:
• 64 mA sink current, 32 mA source current
• Typical VOLP (ground bounce) & lt; 1.0V at VCC = 5V,
TA = 25˚C
The CY74FCT162245T has 24-mA balanced output drivers
with current limiting resistors in the outputs. This reduces the
need for external terminating resistors and provides for minimal undershoot and reduced ground bounce. The
CY74FCT162245T is ideal for driving transmission lines.
CY74FCT162245T Features:
• Balanced output drivers: 24 mA
• Reduced system switching noise
• Typical VOLP (ground bounce) & lt; 0.6V at VCC = 5V,
TA= 25˚C
The CY74FCT162H245T is a 24-mA balanced output part that
has bus hold on the data inputs. The device retains the input’s
last state whenever the input goes to high impedance. This
eliminates the need for pull-up/down resistors and prevents
floating inputs.
CY74FCT162H245T Features:
• Bus hold on data inputs
• Eliminates the need for external pull-up or pull-down
resistors
Logic Block Diagrams CY74FCT16245T,CY74FCT162245T,
CY74FCT162H245T
1DIR
Pin Configuration
SSOP/TSSOP
Top View
2DIR
1OE
1A1
2OE
1DIR
1
48
1OE
1B1
2
3
47
46
1A1
GND
1B3
4
5
45
44
GND
1A3
1B4
6
43
2B2
VCC
1B5
1A4
VCC
1A5
2B3
GND
7 16245T 42
8 162245T 41
162H245T
9
40
10
39
GND
1B7
11
38
1A7
1B8
12
13
37
36
2A1
GND
14
15
35
34
GND
2B3
16
33
2A3
2B4
17
32
VCC
2B5
18
31
19
30
2A4
VCC
2A5
2B6
20
29
2A6
GND
21
28
GND
2B7
22
27
2A7
2B8
23
26
2A8
2DIR
24
25
2OE
2A1
1B1
1A2
1B2
2B1
2A2
1B2
1A3
2A3
1B3
1A4
1B6
2A4
1B4
1A5
2B4
2B1
2B2
2A5
1B5
1A6
2B5
2A6
1B6
1A7
2B6
2A7
1B7
1A8
2B7
2A8
1B8
FCT16245–1
2B8
1A2
1A6
1A8
2A2
FCT16245–3
FCT16245–2
Copyright
© 2000, Texas Instruments Incorporated
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
Maximum Ratings[3, 4]
Pin Description
Name
(Above which the useful life may be impaired. For user
guidelines, not tested.)
Storage Temperature ........................Com’l -55°C to +125°C
Description
OE
Three-State Output Enable Inputs (Active LOW)
DIR
Direction Control
A
Inputs or Three-State Outputs[1]
Ambient Temperature with
Power Applied....................................Com’l -55°C to +125°C
B
Inputs or Three-State Outputs[1]
DC Input Voltage ........................................... –0.5V to +7.0V
DC Output Voltage......................................... –0.5V to +7.0V
DC Output Current
(Maximum Sink Current/Pin) ........................–60 to +120 mA
Function Table[2]
Inputs
Power Dissipation .......................................................... 1.0W
OE
DIR
Outputs
L
L
Bus B Data to Bus A
Static Discharge Voltage............................................ & gt; 2001V
(per MIL-STD-883, Method 3015)
L
H
Bus A Data to Bus B
Operating Range
H
X
High Z State
Ambient
Temperature
Industrial
VCC
–40°C to +85°C
Range
5V ± 10%
Notes:
1. On CY74FCT162H245T these pins have bus hold.
2. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care. Z = High Impedance.
3. Operation beyond the limits set forth may impair the useful life of the device. Unless otherwise noted, these limits are over the operating free-air temperature range.
4. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground.
Electrical Characteristics Over the Operating Range
Parameter
Description
VIH
Input HIGH Voltage
VIL
Input
Hysteresis[6]
VIK
Input Clamp Diode Voltage
IIH
Input HIGH Current
Min.
Typ.[5]
Input LOW Voltage
VH
Test Conditions
2.0
0.8
100
VCC=Min., IIN=–18 mA
Standard
Input LOW Current
Standard
–0.7
IBBH
IBBL
Bus Hold Sustain Current on Bus Hold
IBHHO
IBHLO
Bus Hold Overdrive Current on Bus Hold
IOZH
High Impedance Output Current
(Three-State Output pins)
IOZL
IOS
IO
IOFF
mV
–1.2
V
µA
±100
±1
VCC=Min.
VI=2.0V
µA
±100
VCC=Max., VI=GND
µA
µA
–50
VI=0.8V
Input[7]
V
±1
VCC=Max., VI=VCC
Bus Hold
Input[7]
Unit
V
Bus Hold
IIL
Max.
+50
TBD
mA
VCC=Max., VOUT=2.7V
±1
µA
High Impedance Output Current
(Three-State Output pins)
VCC=Max., VOUT=0.5V
±1
µA
Short Circuit Current[8]
VCC=Max., VOUT=GND
–80
–200
mA
Current[8]
VCC=Max., VOUT=2.5V
–50
–180
mA
±1
µA
Output Drive
Power-Off Disable
VCC=Max., VI=1.5V
VCC=0V, VOUT≤4.5V
2
[9]
–140
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
Output Drive Characteristics for CY74FCT16245T
VOL
Typ.[5]
VCC=Min., IOH=–3 mA
2.5
3.5
V
2.4
3.5
V
VCC=Min., IOH=–32 mA
VOH
Min.
VCC=Min., IOH=–15 mA
Parameter
2.0
3.0
V
Description
Output HIGH Voltage
Output LOW Voltage
Test Conditions
VCC=Min., IOL=64 mA
Max.
Unit
0.2
0.55
V
Typ.[5]
Max.
Unit
Output Drive Characteristics for CY74FCT162245T, CY74FCT162H245T
Parameter
Description
[8]
Test Conditions
Min.
IODL
Output LOW Current
VCC=5V, VIN=VIH or VIL, VOUT=1.5V
60
115
150
mA
IODH
Output HIGH Current[8]
VCC=5V, VIN=VIH or VIL, VOUT=1.5V
–60
–115
–150
mA
VOH
Output HIGH Voltage
VCC=Min., IOH=–24 mA
2.4
3.3
VOL
Output LOW Voltage
VCC=Min., IOL=24 mA
0.3
V
0.55
V
Notes:
5. Typical values are at VCC=5.0V, TA=+25˚C ambient.
6. This parameter is specified but not tested.
7. Pins with bus hold are described in Pin Description.
8. Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus and/or sample
and hold techniques are preferable in order to minimize internal chip heating and more accurately reflect operational values. Otherwise prolonged shorting of
a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parametric tests. In any sequence of parameter
tests, IOS tests should be performed last.
9. Tested at +25˚C.
Capacitance[6] (TA = +25˚C, f = 1.0 MHz)
Parameter
Description
Test Conditions
Typ.[5]
Max.
Unit
CIN
Input Capacitance
VIN = 0V
4.5
6.0
pF
COUT
Output Capacitance
VOUT = 0V
5.5
8.0
pF
3
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
Power Supply Characteristics
Parameter
Description
Test Conditions
Typ.[5]
Max.
Unit
5
500
µA
0.5
1.5
mA
ICC
Quiescent Power Supply Current VCC=Max.
VIN & lt; 0.2V,
VIN & gt; VCC-0.2V
∆ICC
Quiescent Power Supply Current VCC=Max.
(TTL inputs HIGH)
VIN=3.4V[10]
ICCD
Dynamic Power Supply
Current[11]
VCC=Max., One Input Toggling, VIN=VCC or
50% Duty Cycle, Outputs Open, VIN=GND
OE=DIR=GND
60
100
µA/MHz
IC
Total Power Supply Current[12]
VCC=Max., f1=10 MHz,
VIN=VCC or
50% Duty Cycle, Outputs Open, VIN=GND
One Bit Toggling,
VIN=3.4V or
OE=DIR=GND
VIN=GND
0.6
1.5
mA
0.9
2.3
mA
VCC=Max., f1=2.5 MHz, 50%
Duty Cycle, Outputs Open,
Sixteen Bits Toggling,
OE=DIR=GND
VIN=VCC or
VIN=GND
2.4
4.5[13]
mA
VIN=3.4V or
VIN=GND
6.4
16.5[13]
mA
Notes:
10. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND.
11. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
= IQUIESCENT + IINPUTS + IDYNAMIC
12. IC
IC
= ICC+∆ICCDHNT+ICCD(f0/2 + f1N1)
ICC = Quiescent Current with CMOS input levels
∆ICC = 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)
= Clock frequency for registered devices, otherwise zero
f0
= Input signal frequency
f1
N1 = Number of inputs changing at f1
All currents are in milliamps and all frequencies are in megahertz.
13. Values for these conditions are examples of the ICC formula. These limits are specified but not tested.
4
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
]
Switching Characteristics Over the Operating Range[14]
74FCT16245T
74FCT162245T
Parameter
74FCT16245AT
74FCT162245AT
74FCT162H245AT
Min.
Description
Max.
Min.
Max.
Unit
Fig.
No.[15]
tPLH
tPHL
Propagation Delay Data to Output
A to B, B to A
1.5
7.0
1.5
4.5
ns
1, 3
tPZH
tPZL
Output Enable Time
OE to A or B
1.5
9.5
1.5
6.2
ns
1, 7, 8
tPHZ
tPLZ
Output Disable Time
OE to A or B
1.5
7.5
1.5
5.0
ns
1, 7, 8
tPZH
tPZL
Output Enable Time
DIR to A or B
1.5
9.5
1.5
6.2
ns
1, 7, 8
tPHZ
tPLZ
Output Disable Time
DIR to A or B
1.5
7.5
1.5
5.0
ns
1, 7, 8
tSK(O)
Output Skew[16]
0.5
ns
—
0.5
74FCT16245CT
74FCT162245CT
74FCT162H245CT
Parameter
74FCT16245ET
74FCT162245ET
74FCT162H245ET
Min.
Description
Max.
Min.
Max.
Unit
Fig.
No.[15]
tPLH
tPHL
Propagation Delay Data to Output
A to B, B to A
1.5
4.1
1.5
3.2
ns
1, 3
tPZH
tPZL
Output Enable Time
OE to A or B
1.5
5.8
1.5
4.4
ns
1, 7, 8
tPHZ
tPLZ
Output Disable Time
OE to A or B
1.5
4.8
1.5
4.0
ns
1, 7, 8
tPZH
tPZL
Output Enable Time
DIR to A or B
1.5
5.8
1.5
4.8
ns
1, 7, 8
tPHZ
tPLZ
Output Disable Time
DIR to A or B
1.5
4.8
1.5
4.0
ns
1, 7, 8
tSK(O)
Output Skew[16]
0.5
ns
—
0.5
Note:
14. Minimum limits are specified but not tested on Propagation Delays.
15. See “Parameter Measurement Information” in the General Information section.
16. Skew between any two outputs of the same package switching in the same direction. This parameter is ensured by design.
Ordering Information CY74FCT16245
Speed
(ns)
3.2
Ordering Code
Package
Name
Package Type
48-Lead (300-Mil) SSOP
CY74FCT16245CTPACT
Z48
48-Lead (240-Mil) TSSOP
O48
48-Lead (300-Mil) SSOP
CY74FCT16245ATPACT
Z48
48-Lead (240-Mil) TSSOP
CY74FCT16245ATPVC/PVCT
7.0
48-Lead (240-Mil) TSSOP
O48
CY74FCT16245CTPVC/PVCT
4.5
Z48
CY74FCT16245ETPVC/PVCT
4.1
CY74FCT16245ETPACT
O48
48-Lead (300-Mil) SSOP
CY74FCT16245TPACT
Z48
48-Lead (240-Mil) TSSOP
CY74FCT16245TPVC/PVCT
O48
48-Lead (300-Mil) SSOP
Operating
Range
5
Industrial
Industrial
Industrial
Industrial
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
Ordering Information CY74FCT162245
Speed
(ns)
3.2
Ordering Code
Package
Name
Package Type
O48
48-Lead (300-Mil) SSOP
O48
48-Lead (300-Mil) SSOP
CY74FCT162245CTPACT
Z48
48-Lead (240-Mil) TSSOP
CY74FCT162245CTPVC
O48
48-Lead (300-Mil) SSOP
74FCT162245CTPVCT
O48
48-Lead (300-Mil) SSOP
74FCT162245ATPACT
Z48
48-Lead (240-Mil) TSSOP
CY74FCT162245ATPVC
O48
48-Lead (300-Mil) SSOP
74FCT162245ATPVCT
O48
48-Lead (300-Mil) SSOP
CY74FCT162245TPACT
Z48
48-Lead (240-Mil) TSSOP
CY74FCT162245TPVC/PVCT
7.0
48-Lead (240-Mil) TSSOP
74FCT162245ETPVCT
4.5
Z48
CY74FCT162245ETPVC
4.1
74FCT162245ETPACT
O48
Operating
Range
Industrial
48-Lead (300-Mil) SSOP
Industrial
Industrial
Industrial
Ordering Information CY74FCT162H245
Speed
(ns)
3.2
Ordering Code
Package
Name
Package Type
48-Lead (240-Mil) TSSOP
O48
48-Lead (300-Mil) SSOP
74FCT162H245ETPVCT
O48
48-Lead (300-Mil) SSOP
74FCT162H245CTPACT
Z48
48-Lead (240-Mil) TSSOP
CY74FCT162H245CTPVC
O48
48-Lead (300-Mil) SSOP
74FCT162H245CTPVCT
4.5
Z48
CY74FCT162H245ETPVC
4.1
74FCT162H245ETPACT
O48
48-Lead (300-Mil) SSOP
74FCT162H245ATPACT
Z48
48-Lead (240-Mil) TSSOP
CY74FCT162H245ATPVC
O48
48-Lead (300-Mil) SSOP
74FCT162H245ATPVCT
O48
48-Lead (300-Mil) SSOP
Operating
Range
6
Industrial
Industrial
Industrial
CY74FCT16245T/2245T
CY74FCT16445T/2H245T
Package Diagrams
48-Lead Shrunk Small Outline Package O48
7
CY74FCT16245T
CY74FCT162245T
CY74FCT162H245T
Package Diagrams
48-Lead Thin Shrunk Small Outline Package Z48
8
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
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Copyright © 2000, Texas Instruments Incorporated