21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16646T
PI74FCT162646T
PI74FCT162H646T
Fast CMOS 16-Bit
Registered Transceivers
Product Features
Common Features:
PI74FCT16646T, PI74FCT162646T, and PI74FCT162H646 are
high-speed, low power devices with high current drive
V
CC
= 5V ± 10%
Hysteresis on all inputs
Packages available:
56-pin 240 mil wide plastic TSSOP (A)
56-pin 173 mil wide plastic TVSOP (JEDEC TSSOP K)
56-pin 300 mil wide plastic SSOP (V)
PI74FCT16646T Features:
High output drive: I
OH
= 32mA; I
OL
= 64mA
Power off disable outputs permit live insertion
Typical V
OLP
(Output Ground Bounce)
< 1.0V at V
CC
= 5V, T
A
= 25°C
PI74FCT162646T Features:
Balanced output drivers: ±24mA
Reduced system switching noise
Typical V
OLP
(Output Ground Bounce)
< 0.6V at V
CC
= 5V, T
A
= 25°C
PI74FCT162H646T Features:
Bus Hold retains last active bus state during Three-state
Eliminates the need for external pull-up resistors
Product Description
Pericom Semiconductors PI74FCT series of logic circuits are
pro duced in the Companys advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
The PI74FCT16646T, PI74FCT162646T, and PI74FCT162H646
are 16-bit registered transceivers organized as two independent
8-bit bus transceivers designed with 3-state D-type flip-flops and
control circuitry arranged for multiplexed transmission of data
directly from the data bus or from the internal storage registers. Each
8-bit transceiver utilizes the enable control (xOE) and direction pins
(xDIR) to control the transceiver functions. The Select (xSAB and
xSBA) control pins are used to select either real-time or stored data
transfer. The circuitry used for select control will eliminate the
typical decoding glitch that occurs in a multiplexer during the
transition between real-time and stored data. A low input level
selects real-time data and a high selects stored data.
The PI74FCT16646T output buffers are designed with a Power-Off
disable allowing live insertion of boards when used as backplane
drivers.
The PI74FCT162646T has ±24mA balanced output drivers. It is
designed with current limiting resistors at its outputs to control the
output edge rate resulting in lower ground bounce and undershoot.
This eliminates the need for external terminating resistors for most
interface applications.
The PI74FCT162H646T has Bus Hold which retains the inputs
last state whenever the input goes to high-impedance preventing
floating inputs and eliminating the need for pull-up/down resistors.
Logic Block Diagram
1
OE
1
DIR
1
CLKBA
1
SBA
1
SAB
1
CLKAB
2
OE
2
DIR
2
CLKBA
2
SBA
2
SAB
2
CLKAB
B REG
D
C
1
A0
B REG
D
C
1
B0
2
A0
A REG
D
C
A REG
D
C
2
B0
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
1
PS2039B
02/24/99
Product Pin Configuration
1
DIR
1
CLKAB
1
SAB
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16646T/162646T/162H646T
16-Bit Registered Transceivers
Truth Table
Function/Operation
Isolation
Store A and B Data
Real Time B Data to A Bus
Stored B Data to A Bus
Real Time A Data to B Bus
Stored A Data to B Bus
xOE
H
H
L
L
L
L
X
DIR
X
X
L
L
H
H
Inputs
X
CLKAB
X
CLKBA
H or L
H or L
↑
↑
X
X
X
H or L
X
X
H or L
X
X
SAB
X
SBA
X
X
X
X
L
H
X
X
L
H
X
X
DATA I/O
(2)
X
A
X
X
B
X
Input
Input
Output
Input
Input
Output
Notes:
1.The data output functions may be enabled or disabled by various signals at the xOE or xDIR inputs.
Data input functions are always enabled, i.e., data at the bus pins will be stored on every low-to-high transition on the clock inputs.
2. Select control = L: clocks can occur simultaneously.
Select control = H: clocks must be staggered to load both registers.
H = High Voltage Level; L = Low Voltage Level; X = Don’t Care;
↑
= LOW-to-HIGH transition
Product Pin Description
1
OE
1
CLKBA
1
SBA
1
2
GND
1
A
0
1
A
1
VCC
1
A
2
1
A
3
1
A
4
GND
1
A
5
1
A
6
1
A
7
2
A
0
2
A
1
2
A
2
56
55
3
54
4
53
5
52
6
51
7
50
8
49
9
48
56-PIN
47
10
V56
11
46
A56
12
45
K56
13
44
14
43
15
42
16
41
17
40
18
19
20
21
22
23
24
25
26
27
28
39
38
37
36
35
34
33
32
31
30
29
Pin Name
xAx
(1)
xBx
(1)
xCLKAB, xCLKBA
SAB, SBA
xDIR, xOE
GND
V
CC
Description
Data Register A Inputs
Data Register B Outputs
Data Register B Inputs
Data Register A Outputs
Clock Pulse Inputs
Output Data Source Select Inputs
Output Enable Inputs
Ground
Power
GND
1
B
0
1
B
1
VCC
1
B
2
1
B
3
1
B
4
GND
1
B
5
1
B
6
1
B
7
2
B
0
2
B
1
2
B
2
Note:
1.For the PI74FCT162H646T, these pins have
“Bus Hold.” All other pins are standard, outputs, or I/Os.
GND
2
A
3
2
A
4
2
A
5
GND
2
B
3
2
B
4
2
B
5
V
CC
2
A
6
2
A
7
V
CC
2
B
6
2
B
7
GND
2
SAB
2
CLKAB
2
DIR
GND
2
SBA
2
CLKBA
2
OE
2
PS2039B
02/24/99
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16646T/162646T/162H646T
16-Bit Registered Transceivers
REAL-TIME TRANSFER
BUS B TO A
REAL-TIME TRANSFER
BUS A TO B
BUS
A
BUS
B
BUS
A
BUS
B
xDIR xOE
L
L
xCLKAB
X
xCLKBA
X
xSAB
X
xSBA
L
xDIR xOE
H
L
xCLKAB
X
xCLKBA
X
xSAB
L
xSBA
X
STORAGE FROM
A AND/OR B
TRANSFER STORES
DATA TO A AND/OR B
BUS
A
BUS
B
BUS
A
BUS
B
xDIR xOE
H
L
L
L
X
H
xCLKAB
X
xCLKBA
X
xSAB
X
X
X
xSBA
X
X
X
xDIR xOE
L
L
H
L
xCLKAB
X
H or L
xCLKBA
H or L
X
xSAB
X
H
xSBA
H
X
3
PS2039B
02/24/99
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16646T/162646T/162H646T
16-Bit Registered Transceivers
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
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 .................................................................................... 120mA
Power Dissipation ......................................................................................... 1.0W
Note:
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, T
A
= 40°C to +85°C, V
CC
= 5.0V ± 10%)
Parameters Description
V
IH
V
IL
I
IH
I
IH
I
IH
I
IH
I
IL
I
IL
I
IL
I
IL
I
BHH
I
BHL
I
OZH(5)
I
OZL(5)
V
IK
I
OS
I
O
V
H
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input HIGH Current
Input HIGH Current
Input HIGH Current
Input LOW Current
Input LOW Current
Input LOW Current
Input LOW Current
Bus Hold
Sustain Current
High-Impedance
Output Current
(3-S
TATE
O
UTPUTS
)
Clamp Diode Voltage
Short Circuit Current
Output Drive Current
Input Hysteresis
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
Standard Input, V
CC
= Max.
Standard I/O, V
CC
= Max.
Bus Hold Input
(4)
, V
CC
= Max.
Bus Hold I/O
(4)
, V
CC
= Max.
Standard Input, V
CC
= Min.
Standard I/O, V
CC
= Min.
Bus Hold Input
(4)
, V
CC
= Min.
Bus Hold I/O
(4)
, V
CC
= Min.
Bus Hold Input
(4)
, V
CC
= Min.
V
CC
= Max.
V
CC
= Max.
V
CC
= Min., I
IN
= 18mA
V
CC
= Max.
(3)
, V
OUT
= GND
V
CC
= Max.
(3)
, V
OUT
= 2.5V
Min.
2.0
V
IN
= V
CC
V
IN
= V
CC
V
IN
= V
CC
V
IN
= V
CC
V
IN
= GND
V
IN
= GND
V
IN
= GND
V
IN
= GND
V
IN
= 2.0V
V
IN
= 0.8V
V
OUT
= 2.7V
V
OUT
= 0.5V
0.8
1
1
±100
±100
1
1
±100
±100
50
+50
Typ.
(2)
Max.
Units
V
V
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
V
mA
mA
m
V
1
1
0.7
140
100
1.2
200
180
80
50
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, +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. Pins with Bus Hold are identified in the pin description.
5. This specification does not apply to bi-directional functionalities with Bus Hold.
4
PS2039B
02/24/99
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16646T/162646T/162H646T
16-Bit Registered Transceivers
PI74FCT16646T Output Drive Characteristics
(Over the Operating Range)
Parameters Description
V
OH
Output HIGH Voltage
Test Conditions
(1)
V
CC
= Min., V
IN
= V
IH
or V
IL
I
OH
= –3.0mA
I
OH
= –15.0mA
I
OH
= –32.0mA
I
OL
= 64mA
Min.
2.5
2.4
2.0
—
Typ.
(2)
3.5
3.5
3.0
0.2
—
Max.
Units
V
V
OL
I
OFF
Output LOW Voltage
Power Down Disable
V
CC
= Min., V
IN
= V
IH
or V
IL
V
CC
= 0V, V
IN
or V
OUT
≤
4.5V
0.55
±100
V
µA
PI74FCT162646T/162H646T Output Drive Characteristics
(Over the Operating Range)
Parameters Description
V
OH
V
OL
I
ODL
I
ODH
Output HIGH Voltage
Output LOW Voltage
Output LOW Current
Output HIGH Current
Test Conditions
(1)
V
CC
= Min., V
IN
= V
IH
or V
IL
I
OH
= 24.0mA
V
CC
= Min., V
IN
= V
IH
or V
IL
I
OL
= 24mA
V
CC
= 5V, V
IN
= V
IH OR
V
IL
, V
OUT
= 1.5V
(3)
V
CC
= 5V, V
IN
= V
IH OR
V
IL
, V
OUT
= 1.5V
(3)
Min.
2.4
60
60
Typ.
(2)
3.3
0.3
115
115
Max.
0.55
150
150
Units
V
V
mA
mA
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(4)
C
IN
C
OUT
Description
Input Capacitance
Output Capacitance
Test Conditions
V
IN
= 0V
V
OUT
= 0V
Typ.
4.5
5.5
Max.
6
8
Units
pF
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, +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. This parameter is determined by device characterization but is not production tested.
5
PS2039B
02/24/99
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