21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16652/162652T
16-BIT REGISTERED TRANSCEIVERS
PI74FCT16652T
PI74FCT162652T
Product Features:
Common Features:
• PI74FCT16652T and PI74FCT162652T are high-speed, low
power devices with high current drive.
• Vcc = 5V ±10%
• Hysteresis on all inputs
• Packages available:
– 56-pin 240 mil wide plastic TSSOP (A)
– 56-pin 300 mil wide plastic SSOP (V)
PI74FCT16652T Features:
• High output drive: I
OH
= –32 mA; I
OL
= 64 mA
• Power off disable outputs permit “live insertion”
• Typical V
OLP
(Output Ground Bounce)
< 1.0V at V
CC
= 5V, T
A
= 25°C
PI74FCT162652T Features:
• Balanced output drivers: ±24 mA
• Reduced system switching noise
• Typical V
OLP
(Output Ground Bounce)
< 0.6V at V
CC
= 5V, T
A
= 25°C
Fast CMOS 16-Bit
Registered Transceivers
Product Description:
Pericom Semiconductor's PI74FCT series of logic circuits are pro-
duced in the Company’s advanced 0.8 micron CMOS technology,
achieving industry leading speed grades.
The PI74FCT16652T and PI74FCT162652T 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 controls (xOEAB and x OEBA) 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 PI74FCT16652T output buffers are designed with a Power-
Off disable allowing “live insertion” of boards when used as
backplane drivers.
The PI74FCT162652T has ±24 mA 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.
Logic Block Diagram
1
OEAB
2
OEAB
1
OEBA
2
OEBA
1
CLKBA
1
SBA
2
CLKBA
2
SBA
1
CLKAB
1
SAB
2
CLKAB
2
SAB
B REG
D
C
B REG
D
C
1
A
0
2
A
0
A REG
D
C
1
B
0
A REG
D
C
2
B
0
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
1
PS2079A 01/15/95
Product Pin Configuration
1
OEAB
1
CLKAB
1
SAB
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PI74FCT16652/162652T
16-BIT REGISTERED TRANSCEIVERS
Truth Table
Inputs
DATA I/O
(2)
X
SAB
X
SBA
X
A
X
X
B
X
Function/Operation
Isolation
Store A and B Data
Store A, Hold B
Store A in Both Registers
Hold A, Store B
Store B in Both Registers
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
Stored A Data to B Bus and
Stored B Data to A Bus
1.
xOEAB
L
L
X
H
L
L
L
L
H
H
H
X
OEBA
X
CLKAB
X
CLKBA
H
H
H
H
X
L
L
L
H
H
L
H or L
↑
↑
↑
H or L
↑
X
X
X
H or L
H or L
H or L
↑
H or L
↑
↑
↑
X
H or L
X
X
H or L
X
X
X
X
(2)
X
X
X
X
L
H
H
X
X
X
X
X
X
(2)
L
H
X
X
H
Input
Input
Input
Unspecified
(1)
Input
Output
Unspecified
(1)
Input
Output
Input
Output
Input
Input
Output
Output
Output
2.
The data output functions may be enabled or disabled by various signals at the xOEAB or xOEBA 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.
Select control = L: clocks can occur simultaneously.
Select control = H: clocks must be staggered in order to load both registers.
H = High Voltage Level; L = Low Voltage Level; X = Don’t Care;
↑
= LOW-to-HIGH transition
Product Pin Description
56
55
54
53
52
51
50
49
48
1
OEBA
1
CLKBA
1
SBA
1
2
3
4
5
6
7
8
9
Pin Name
xAx
xBx
xCLKAB, xCLKBA
SAB, SBA
xOEAB, xOEBA
GND
V
CC
GND
1
A
0
1
A
1
GND
1
B
0
1
B
1
VCC
1
A
2
1
A
3
1
A
4
VCC
1
B
2
1
B
3
1
B
4
GND
1
A
5
1
A
6
1
A
7
2
A
0
2
A
1
2
A
2
10
47
11
46
56-PIN
45
12
V56
44
13
A56
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
GND
1
B
5
1
B
6
1
B
7
2
B
0
2
B
1
2
B
2
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
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
OEAB
GND
2
SBA
2
CLKBA
2
OEBA
2
PS2079A 01/15/95
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PI74FCT16652/162652T
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
xOEAB xOEBA xCLKAB xCLKBA xSAB xSBA
L
L
X
X
X
L
xOEAB xOEBA xCLKAB xCLKBA xSAB xSBA
H
H
X
X
L
X
STORAGE FROM
A AND/OR B
TRANSFER STORES
DATA TO A AND/OR B
BUS
A
BUS
B
BUS
A
BUS
B
xOEAB
X
L
L
xOEBA xCLKAB xCLKBA xSAB xSBA
H
X
X
X
X
X
X
X
H
X
X
xOEAB xOEBA xCLKAB xCLKBA xSAB xSBA
H
L
H or L
H or L
H
H
3
PS2079A 01/15/95
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PI74FCT16652/162652T
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 ..................................................................................... 120 mA
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
IL
I
OZH
I
OZL
V
IK
I
OS
I
O
V
H
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance
Output Current
Clamp Diode Voltage
Short Circuit Current
Output Drive Current
Input Hysteresis
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.
V
CC
= Min., I
IN
= –18 mA
V
CC
= Max.
(3)
, V
OUT
= GND
V
CC
= Max.
(3)
, V
OUT
= 2.5V
Min.
2.0
V
IN
= V
CC
V
IN
= GND
V
OUT
= 2.7V
V
OUT
= 0.5V
–80
–50
–0.7
–140
100
0.8
1
–1
1
–1
–1.2
–200
–180
Typ
(2)
Max.
Units
V
V
µA
µA
µA
µA
V
mA
mA
mV
PI74FCT16652T 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
= –3.0 mA
I
OH
= –15.0 mA
I
OH
= –32.0 mA
I
OL
= 64 mA
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
PI74FCT162652T 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
= –24.0 mA
V
CC
= Min., V
IN
= V
IH
or V
IL
I
OL
= 24 mA
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.
4
PS2079A 01/15/95
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PI74FCT16652/162652T
16-BIT REGISTERED TRANSCEIVERS
Power Supply Characteristics
Parameters Description
I
CC
∆I
CC
I
CCD
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz
(4)
Test Conditions
(1)
V
CC
= Max.
V
CC
= Max.
V
IN
= GND or V
CC
V
IN
= 3.4V
(3)
Min.
Typ
(2)
0.1
0.5
75
Max.
500
1.5
120
Units
µA
mA
µA/
MHz
V
CC
= Max., Outputs Open V
IN
= V
CC
xOEAB = xOEBA = GND V
IN
= GND
One Bit Toggling
50% Duty Cycle
V
CC
= Max.,
Outputs Open
f
CP
= 10 MH
Z
(
X
CLKBA)
50% Duty Cycle
xOEAB = xOEBA = GND
One Bit Toggling
f
I
= 5 MH
Z
50% Duty Cycle
V
CC
= Max.,
Outputs Open
f
CP
= 10 MH
Z
(
X
CLKBA)
50% Duty Cycle
xOEAB = xOEBA = GND
16 Bits Toggling
f
I
= 2.5 MH
Z
50% Duty Cycle
V
IN
= V
CC
V
IN
= GND
I
C
Total Power Supply
Current
(6)
0.8
1.7
(5)
mA
V
IN
= 3.4V
V
IN
= GND
V
IN
= V
CC
V
IN
= GND
1.3
3.2
(5)
3.8
6.5
(5)
V
IN
= 3.4V
V
IN
= GND
8.3
22.0
(5)
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 (V
IN
= 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. I
C
=I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
∆I
CC
D
H
N
T
+ I
CCD
(f
CP
/2 + f
I
N
I
)
I
CC
= Quiescent Current
∆I
CC
= Power Supply Current for a TTL High Input (V
IN
= 3.4V)
D
H
= Duty Cycle for TTL Inputs High
N
T
= Number of TTL Inputs at D
H
I
CCD
= Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f
CP
= Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
I
= Input Frequency
N
I
= Number of Inputs at f
I
All currents are in milliamps and all frequencies are in megahertz.
5
PS2079A 01/15/95
Analogue and Mixed Signal
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