PI5C162244A [PERICOM]
Bus Driver, CBT/FST/QS/5C/B Series, 4-Func, 4-Bit, True Output, CMOS, PDSO48, 0.240 INCH, PLASTIC, TSSOP-48;
| 型号： | PI5C162244A |
| 厂家： | 
PERICOM SEMICONDUCTOR CORPORATION |
| 描述： | Bus Driver, CBT/FST/QS/5C/B Series, 4-Func, 4-Bit, True Output, CMOS, PDSO48, 0.240 INCH, PLASTIC, TSSOP-48 驱动 光电二极管 逻辑集成电路 |
| 文件： | 总3页 (文件大小：37K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI5C16244
PI5C162244 (25Ω)
16-Bit BusSwitch
Product Features:
• Near-zero propagation delay
Product Description:
• 5Ω switches connect inputs to outputs when enabled
Pericom Semiconductor’s PI5C series of logic circuits are pro-
duced in the Company’s advanced 0.6 micron CMOS technology.
•
•
Direct bus connection when switches are ON
Ultra-low quiescent power (0.2 µA typical)
– Ideally suited for notebook applications
The PI5C16244 and PI5C162244 are 16-bit, 4-port bus switches
that are pin compatible with the 74 series 16244 16-bit driver. Four
enable signals (nBE) turn the switches on similar to the enable
signalsofthe16244.Thebusswitchcreatesnoadditionalpropagation
delay or ground bounce noise.
•
Pin compatible with 74 series16244
• Industrial operating temperature: –40°C to +85°C
• Packages available:
The PI5C162244 device has a built-in 25-ohm series resistor to
reducenoisebecauseofreflections,thuseliminatingtheneedforan
external terminating resistor.
– 48-pin 240 mil wide thin plastic TSSOP (A)
– 48-pin 300 mil wide plastic SSOP (V)
– 48-pin 150 mil wide plastic BQSOP (B)
Logic Block Diagram
Product Pin Configuration
1BE
1B0
1
2
3
4
5
6
7
8
9
48
47
46
2BE
1A0
1A1
1BE
1A0
1A1
1A2
1A3
3BE
3A0
3A1
3A2
3A3
1B1
1B0
1B1
1B2
1B3
3B0
3B1
3B2
3B3
GND
1B2
45 GND
44
43
42
41
40
1A2
1A3
VCC
2A0
2A1
1B3
VCC
2B0
2B1
GND 10
39 GND
48-PIN
A,V,B
2B2
2B3
3B0
3B1
11
12
13
14
38
37
36
35
2A2
2A3
3A0
3A1
2BE
2A0
2A1
2A2
2A3
4BE
4A0
4A1
4A2
4A3
2B0
2B1
2B2
2B3
4B0
4B1
4B2
4B3
GND 15
34 GND
3B2
3B3
VCC
4B0
4B1
16
17
18
19
20
33
32
31
30
29
3A2
3A3
VCC
4A0
4A1
GND 21
28 GND
Truth Table(1)
Function
4B2
4B3
22
23
27
26
25
4A2
4A3
3BE
nBE nA0–7
4BE 24
Disconnect
Connect
H
L
Hi-Z
nB0–7
Product Pin Description
Note: 1. H = High Voltage Level
L = Low Voltage Level
Pin Name I/O
Description
Hi-Z = High Impedance
nBE
I
Bus Output Enable
(Active LOW)
nA0-nA7
nB0-nB7
I/O
I/O
Bus A
Bus B
PS7024B 09/17/96
122
PI5C16244/162244
16-BIT BUS SWITCH BUFFER
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
Storage Temperature.................................................................. –65°C to +150°C
Ambient Temperature with Power Applied................................. –40°C to +85°C
Supply Voltage to Ground Potential (Inputs & Vcc Only)........... –0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) ....... –0.5V to +7.0V
DC Input Voltage ......................................................................... –0.5V to +7.0V
DC Output Current ................................................................................... 120 mA
Power Dissipation ......................................................................................... 0.5W
Stresses greater than those listed under
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.
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5V ±10%)
Parameters Description
Test Conditions(1)
Min. Typ.(2) Max. Units
VIH
VIL
IIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
VCC = Max., VIN = VCC
VCC = Max., VIN = GND
0 ≤ A, B ≤ VCC
2.0
–0.5
—
—
—
—
—
—
–0.7
—
150
5
—
0.8
±1
±1
±1
–1.2
—
—
7
V
V
Input LOW Voltage
Input HIGH Current
µA
µA
µA
V
IIL
Input LOW Current
—
IOZH
VIK
IOS
High Impedance Output Current
Clamp Diode Voltage
—
VCC = Min., IIN = –18 mA
A (B) = 0V, B (A) = VCC
—
Short Circuit Current(3)
Input Hysteresis at Control Pins
Switch On Resistance(4)
100
—
mA
mV
Ω
VH
RON
VCC = Min., VIN = 0.0V,
ION = 48 mA
16244
162244
16244
—
20
28
10
35
40
15
48
VCC = Min., VIN = 2.4V,
ION = 15 mA
—
Ω
162244
20
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(5)
Description
Test Conditions
Typ.
Max.
Units
CIN
Input Capacitance
VIN = 0V
VIN = 0V
—
—
6
6
pF
pF
COFF
A/B Capacitance, Switch Off
CON
A/B Capacitance, Switch On
VIN = 0V
—
8
pF
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 5.0V, TA = 25°C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. Measured by the voltage drop between A and B pin at indicated current through the switch. ON resistance is determined by the
lower of the voltages on the two (A,B) pins.
5. This parameter is determined by device characterization but is not production tested.
PS7024B 09/17/96
123
PI5C16244/162244
16-BIT BUS SWITCH BUFFER
Power Supply Characteristics
Parameters Description
Test Conditions(1)
Min. Typ(2) Max. Units
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
—
—
—
0.1
—
—
3.0
µA
∆ICC
ICCD
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.4V(3)
2.5
mA
Supply Current per
Input per MHz(4)
VCC = Max.,
A and B Pins Open
nBE = GND
0.25
mA/
MHz
Control Input Toggling
50% Duty Cycle
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V, control inputs only); A and B pins do not contribute to Icc.
4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified
frequency. The A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is
guaranteed by design.
PI5C16244 Switching Characteristics over Operating Range
PI5C16244
Com.
Parameters
Description
Conditions(1)
Min
Max
Unit
t
t
t
t
t
t
PLH
PHL
PZH
PZL
PHZ
PLZ
Propagation Delay(2,3)
xAx to xBx
C
L
L
= 50 pF
—
0.25
ns
R
= 500Ω
Bus Enable Time
1.5
1.5
5.6
5.2
ns
ns
X
BE to xAx or xBx
Bus Disable Time
BE to xAx or xBx
X
PI5C162244 Switching Characteristics over Operating Range
PI5C162244
Com.
Parameters
Description
Conditions(1)
Min
Max
Unit
t
t
t
t
t
t
PLH
PHL
PZH
PZL
PHZ
PLZ
Propagation Delay(2,3)
xAx to xBx
C
L
L
= 50 pF
—
1.25
ns
R
= 500Ω
Bus Enable Time
1.5
1.5
5.6
5.2
ns
ns
X
BE to xAx or xBx
Bus Disable Time
BE to xAx or xBx
X
Notes:
1. See test circuit and wave forms.
2. This parameter is guaranteed but not tested on Propagation Delays.
3. The bus switch contributes no propagational delay other than the RC delay of the ON resistance of the switch and the load
capacitance. The time constant for the switch alone is of the order of 0.25 ns for 50 pF load. Since this time constant is much
smaller than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay
of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interaction
with the load on the driven side.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
PS7024B 09/17/96
124
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