TI CY74FCT162827TTSSOP 20-bit buffers/line driver Datasheet

1CY74FCT162827T
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT16827T
CY74FCT162827T
20-Bit Buffers/Line Drivers
SCCS064 - August 1994 - Revised March 2000
Features
• 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 < 250 ps
• ESD > 2000V
• TSSOP (19.6-mil pitch) and SSOP (25-mil pitch)
packages
• Industrial temperature range of −40˚C to +85˚C
• VCC = 5V ± 10%
CY74FCT16827T Features:
• 64 mA sink current, 32 mA source current
• Typical VOLP (ground bounce) <1.0V at VCC = 5V,
TA = 25˚C
CY74FCT162827T Features:
• Balanced 24 mA output drivers
• Reduced system switching noise
• Typical VOLP (ground bounce) <0.6V at VCC = 5V,
TA= 25˚C
Functional Description
The CY74FCT16827T 20-bit buffer/line driver and the
CY74FCT162827T
20-bit
buffer/line
driver
provide
high-performance bus interface buffering for wide data/address
paths or buses carrying parity. These parts can be used as a single
20-bit buffer or two 10-bit buffers. Each 10-bit buffer has a pair of
NANDed OE for increased flexibility. The outputs are designed with
a power-off disable feature to allow for live insertion of boards.
The CY74FCT16827T is ideally suited for driving
high-capacitance loads and low-impedance backplanes.
The CY74FCT162827T 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
CY74FCT162827T is ideal for driving transmission lines.
Logic Block Diagrams
Pin Configuration
SSOP/TSSOP
Top View
1OE1
1OE1
1
56
1OE2
1Y1
2
55
1A 1
1Y2
3
54
1A 2
GND
4
53
GND
1Y3
5
52
1A 3
1Y4
6
51
1A 4
VCC
7
50
VCC
8
49
1A 5
1Y6
9
48
1Y7
10
1A 7
GND
1Y8
11
47
46
45
1A 8
1Y9
12
13
44
1A 9
1Y10
14
43
1A 10
2OE1
2Y1
15
42
2A 1
2OE2
2Y2
16
41
2A 2
2Y3
17
40
2A 3
GND
18
39
GND
2Y4
19
38
2A 4
2Y5
20
37
2A 5
2Y6
21
36
2A 6
VCC
2Y7
22
35
VCC
23
34
2A 7
1OE2
1Y1
1A1
1Y5
TO 9 OTHER CHANNELS
2A1
FCT16827-1
2Y1
TO 9 OTHER CHANNELS
FCT16827-2
1A 6
GND
2Y8
24
GND
25
33
32
2A 8
2Y9
26
31
2A 9
2Y10
27
30
2A10
2OE1
28
29
2OE2
GND
FCT16827-3
Copyright
© 2000, Texas Instruments Incorporated
CY74FCT16827T
CY74FCT162827T
Maximum Ratings[2, 3]
Pin Description
Name
(Above which the useful life may be impaired. For user
guidelines, not tested.)
Description
OE
Output Enable Inputs (Active LOW)
A
Data Inputs
Y
Three-State Outputs
Storage Temperature ...............................
−55°C to +125°C
Ambient Temperature with
Power Applied..........................................
−55°C to +125°C
DC Input Voltage .................................................−0.5V to +7.0V
Function Table[1]
DC Output Voltage ..............................................−0.5V to +7.0V
Inputs
DC Output Current
(Maximum Sink Current/Pin) ...........................−60 to +120 mA
Outputs
OE1
OE2
A
Y
L
L
L
L
L
L
H
H
H
X
X
Z
X
H
X
Z
Power Dissipation .......................................................... 1.0W
Static Discharge Voltage............................................>2001V
(per MIL-STD-883, Method 3015)
Operating Range
Range
Industrial
Ambient
Temperature
VCC
−40°C to +85°C
5V ± 10%
Electrical Characteristics Over the Operating Range
Parameter
Description
Test Conditions
VIH
Input HIGH Voltage
VIL
Input LOW Voltage
VH
Input
Hysteresis[5]
VIK
Input Clamp Diode Voltage
VCC=Min., IIN=−18 mA
IIH
Input HIGH Current
IIL
Min.
Typ.[4]
Max.
2.0
Unit
V
0.8
100
mV
−1.2
V
VCC=Max., VI=VCC
±1
µA
Input LOW Current
VCC=Max., VI=GND
±1
µA
IOZH
High Impedance Output
Current (Three-State Output pins)
VCC=Max., VOUT=2.7V
±1
µA
IOZL
High Impedance Output
Current (Three-State Output pins)
VCC=Max., VOUT=0.5V
±1
µA
IOS
Short Circuit Current[6]
VCC=Max., VOUT=GND
−80
−200
mA
Current[6]
VCC=Max., VOUT=2.5V
−50
−180
mA
±1
µA
Max.
Unit
IO
Output Drive
IOFF
Power-Off Disable
VCC=0V, VOUT
−0.7
V
−140
≤4.5V[7]
Output Drive Characteristics for CY74FCT16827T
Parameter
VOH
VOL
1.
2.
3.
4.
5.
6.
7.
Description
Output HIGH Voltage
Output LOW Voltage
Min.
Typ.[4]
VCC=Min., IOH=−3 mA
2.5
3.5
VCC=Min., IOH=−15 mA
2.4
3.5
VCC=Min., IOH=−32 mA
2.0
3.0
Test Conditions
VCC=Min., IOL=64 mA
0.2
V
0.55
V
H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care.Z = HIGH Impedance.
Operation beyond the limits set forth may impair the useful life of the device. Unless noted, these limits are over the operating free-air temperature range.
Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground.
Typical values are at VCC= 5.0V, TA= +25˚C ambient.
This parameter is specified but not tested.
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.
Tested at +25˚C.
2
CY74FCT16827T
CY74FCT162827T
Output Drive Characteristics for CY74FCT162827T
Parameter
Description
Test Conditions
Min.
Typ.[4]
Max.
Unit
Output LOW
Current[6]
VCC=5V, VIN=VIH or VIL, VOUT=1.5V
60
115
150
mA
IODH
Output HIGH
Current[6]
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
IODL
0.3
V
0.55
V
Capacitance[5] (TA = +25˚C, f = 1.0 MHz)
Parameter
Description
Test Conditions
Typ.[4]
Max.
Unit
CIN
Input Capacitance
VIN = 0V
4.5
6.0
pF
COUT
Output Capacitance
VOUT = 0V
5.5
8.0
pF
Power Supply Characteristics
Parameter
Description
Test Conditions
Min.
Typ.[4]
Max.
Unit
ICC
Quiescent Power Supply
Current
VCC=Max.
VIN<0.2V,
VIN>VCC−0.2V
—
5
500
µA
∆ICC
Quiescent Power Supply
Current (TTL inputs HIGH)
VCC=Max.
VIN=3.4V[8]
—
0.5
1.5
mA
ICCD
Dynamic Power Supply
Current[9]
VCC=Max.,
One Input Toggling,
50% Duty Cycle,
Outputs Open,
OE1=OE2=GND,
VIN=VCC or
VIN=GND
—
60
100
µA/MHz
IC
Total Power Supply Current[10]
VCC=Max.,
f1=10 MHz,
50% Duty Cycle,
Outputs Open,
One Bit Toggling,
OE1=OE2=GND
VIN=VCC or
VIN=GND
—
0.6
1.5
mA
VIN=3.4V or
VIN=GND
—
0.9
2.3
VIN=VCC or
VIN=GND
—
3.0
5.5[11]
VIN=3.4V or
VIN=GND
—
8.0
20.5[11]
VCC=Max.,
f1=2.5 MHz,
50% Duty Cycle,
Outputs Open,
Twenty Bits Toggling,
OE1=OE2=GND
Notes:
8. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND.
9. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
= IQUIESCENT + IINPUTS + IDYNAMIC
10. 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)
= Duty Cycle for TTL inputs HIGH
DH
= Number of TTL inputs at DH
NT
ICCD = Dynamic Current caused by an input transition pair (HLH or LHL)
= Clock frequency for registered devices, otherwise zero
f0
= Input signal frequency
f1
= Number of inputs changing at f1
N1
All currents are in milliamps and all frequencies are in megahertz.
11. Values for these conditions are examples of the ICC formula. These limits are specified but not tested.
3
CY74FCT16827T
CY74FCT162827T
Switching Characteristics Over the Operating Range[12]
CY74FCT16827AT
CY74FCT162827AT
Parameter
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tSK(O)
Description
Propagation Delay
A to Y
Output Enable Time
OE to Y
Output Disable Time
OE to Y
Min.
Max.
Min.
Max.
Unit
Fig. No.[13]
CL=50 pF
RL=500Ω
1.5
8.0
1.5
5.0
ns
1, 3
CL=300 pF
RL=500Ω
1.5
15.0
1.5
13.0
CL=50 pF
RL=500Ω
1.5
12.0
1.5
8.0
ns
1, 7, 8
CL=300 pF
RL=500Ω
1.5
23.0
1.5
15.0
CL=5 pF
RL=500Ω
1.5
9.0
1.5
6.0
ns
1, 7, 8
CL=50 pF
RL=500Ω
1.5
10.0
1.5
7.0
—
0.5
—
0.5
ns
—
Output Skew[14]
CY74FCT16827CT
CY74FCT162827CT
Parameter
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tSK(O)
Description
Propagation Delay
A to Y
Output Enable Time
OE to Y
Output Disable Time
OE to Y
Output Skew[14]
CY74FCT162827BT
Condition[13]
CY74FCT16827ET
CY74FCT162827ET
Condition[12]
Min.
Max.
Min.
Max.
Unit
Fig. No.[13]
CL=50 pF
RL=500Ω
1.5
4.2
1.5
3.2
ns
1, 3
CL=300 pF
RL=500Ω
1.5
10.0
1.5
7.0
CL=50 pF
RL=500Ω
1.5
5.6
1.5
4.8
ns
1, 7, 8
CL=300 pF
RL=500Ω
1.5
14.0
1.5
9.0
CL=5 pF
RL=500Ω
1.5
5.7
1.5
4.0
ns
1, 7, 8
CL=50 pF
RL=500Ω
1.5
6.0
1.5
4.0
—
0.5
—
0.5
ns
—
Notes:
12. Minimum limits are specified but not tested on Propagation Delays.
13. See “Parameter Measurement Information” in the General Information section.
14. Skew between any two outputs of the same package switching in the same direction. This parameter is ensured by design.
4
CY74FCT16827T
CY74FCT162827T
Ordering Information CY74FCT16827
Speed
(ns)
3.2
4.2
8.0
Ordering Code
Package
Name
Package Type
CY74FCT16827ETPACT
Z56
56-Lead (240-Mil) TSSOP
CY74FCT16827ETPVC/PVCT
O56
56-Lead (300-Mil) SSOP
CY74FCT16827CTPACT
Z56
56-Lead (240-Mil) TSSOP
CY74FCT16827CTPVC/PVCT
O56
56-Lead (300-Mil) SSOP
CY74FCT16827ATPVC/PVCT
Z56
56-Lead (240-Mil) TSSOP
Operating
Range
Industrial
Industrial
Industrial
Document #: 38−00393–C
Ordering Information CY74FCT162827
Speed
(ns)
3.2
4.2
5.0
8.0
Ordering Code
Package
Name
Package Type
74FCT162827ETPACT
Z56
56-Lead (240-Mil) TSSOP
CY74FCT162827ETPVC
O56
56-Lead (300-Mil) SSOP
74FCT162827ETPVCT
O56
56-Lead (300-Mil) SSOP
74FCT162827CTPACT
Z56
56-Lead (240-Mil) TSSOP
CY74FCT162827CTPVC
Z56
56-Lead (240-Mil) TSSOP
74FCT162827CTPVCT
Z56
56-Lead (240-Mil) TSSOP
CY74FCT162827BTPVC
O56
56-Lead (300-Mil) SSOP
74FCT162827BTPVCT
O56
56-Lead (300-Mil) SSOP
CY74FCT162827ATPVC
O56
56-Lead (300-Mil) SSOP
74FCT162827ATPVCT
O56
56-Lead (300-Mil) SSOP
5
Operating
Range
Industrial
Industrial
Industrial
Industrial
CY74FCT16827T
CY74FCT162827T
Package Diagrams
56-Lead Shrunk Small Outline Package O56
56-Lead Thin Shrunk Small Outline Package Z56
6
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