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IDT74FCT16925AT/CT/ET FAST CMOS 16-BIT REGISTERED TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
FAST CMOS 16-BIT REGISTERED TRANSCEIVER
FEATURES:
• • • • • • •
IDT74FCT16952AT/CT/ET
0.5 MICRON CMOS Technology High-speed, low-power CMOS replacement for ABT functions Typical tSK(o) (Output Skew) < 250ps Low input and output leakage ≤1µA (max.) High drive outputs (-32mA IOH, 64mA IOL) Power off disable outputs permit “live insertion” Typical VOLP (Output Ground Bounce) < 1.0V at VCC = 5V, TA = 25°C • Available in SSOP and TSSOP packages
DESCRIPTION:
The FCT16952T 16-bit registered transceiver is built using advanced dual metal CMOS technology. These high-speed, low-power devices are organized as two independent 8-bit D-type registered transceivers with separate input and output control for independent control of data flow in either direction. For example, the A-to-B Enable (xCEAB) must be low to enter data from the A port. xCLKAB controls the clocking function. When xCLKAB toggles from low-to-high, the data present on the A port will be clocked into the register. xOEAB performs the output enable function on the B port. Data flow from the B port to A port is similar but requires using xCEBA, xCLKBA, and xOEBA inputs. Full 16-bit operation is achieved by tying the control pins of the independent transceivers together. The FCT16952T is ideally suited for driving high-capacitance loads and low-impedance backplanes. The output buffers are designed with power off disable capability allowing "live insertion" of boards when used as backplane drivers.
FUNCTIONAL BLOCK DIAGRAM
54
31
1 CEBA
55
2 CEBA
30
1 CLKBA
1
2 CLKBA
28
1 OEAB
3
2 OEAB
26
1 CEAB
2
2 CEAB
27
1 CLKAB
56
2 CLKAB
29
1 OEBA
5
2 OEBA C CE D
15 52
1A1
2A1 1B1
C CE D
42
2B 1
C CE D
C CE D
TO SEVEN OTHER CHANNELS
TO SEVEN OTHER CHANNELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
2002 Integrated Device Technology, Inc.
JUNE 2002
DSC-5442/2
IDT74FCT16925AT/CT/ET FAST CMOS 16-BIT REGISTERED TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
1 OEAB 1 CLKAB 1 CEAB
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Description Terminal Voltage with Respect to GND Storage Temperature DC Output Current Max –0.5 to +7 –0.5 to VCC+0.5 –65 to +150 –60 to +120 Unit V V °C mA
56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
1 OEBA 1 CLKBA 1 CEBA
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
VTERM(2) TSTG
VTERM(3) Terminal Voltage with Respect to GND IOUT
GND
1A 1 1A 2
GND
1B 1 1B 2
VCC
1A 3 1A 4 1A 5
V CC
1B 3 1B 4 1B 5
NOTES: 1. Stresses greater than those listed under ABSOLUTE 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. 2. All device terminals except FCT162XXX Output and I/O terminals. 3. Output and I/O terminals for FCT162XXX.
GND
1A 6 1A 7 1A 8 2A 1 2A 2 2A 3
GND
1B 6 1B 7 1B 8 2B 1 2B 2 2B 3
CAPACITANCE (TA = +25°C, F = 1.0MHz)
Symbol CIN COUT Parameter(1) Input Capacitance Output Capacitance Conditions VIN = 0V VOUT = 0V Typ. 3.5 3.5 Max. 6 8 Unit pF pF
NOTE: 1. This parameter is measured at characterization but not tested.
GND
2A 4 2A 5 2A 6
GND
2B 4 2B 5 2B 6
FUNCTION TABLE(1,3)
Inputs xCEAB H X L L X xCLKAB X L ↑ ↑ X xOEAB L L L L H xAx X X L H X
Outputs xBx B(2) B(2) L H Z
VCC
2A 7 2A 8
V CC
2B 7 2B 8
GND
2 CEAB 2 CLKAB 2 OEAB
GND
2 CEBA 2 CLKBA 2 OEBA
SSOP/ TSSOP TOP VIEW
PIN DESCRIPTION
Pin Names x OEAB x OEBA x CEAB x CEBA xCLKAB xCLKBA xAx xBx Description A-to-B Output Enable Input (Active LOW) B-to-A Output Enable Input (Active LOW) A-to-B Clock Enable Input (Active LOW) B-to-A Clock Enable Input (Active LOW) A-to-B Clock Input B-to-A Clock Input A-to-B Data Inputs or B-to-A 3-State Outputs B-to-A Data Inputs or A-to-B 3-State Outputs
NOTES: 1. A-to-B data flow is shown: B-to-A data flow is similar but uses xCEBA, xCLKBA, and x OEBA . 2. Level of B before the indicated steady-state input conditions were established. 3. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care ↑ = LOW-to-HIGH Transition Z = High-impedance
2
IDT74FCT16925AT/CT/ET FAST CMOS 16-BIT REGISTERED TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = –40°C to +85°C, VCC = 5.0V ±10%
Symbol VIH VIL IIH IIL IOZH IOZL VIK IOS VH ICCL ICCH ICCZ Parameter Input HIGH Level Input LOW Level Input HIGH Current (Input pins)(5) Input HIGH Current (I/O pins)(5) Input LOW Current (Input pins)(5) Input LOW Current (I/O pins)(5) High Impedance Output Current (3-State Output pins)(5) Clamp Diode Voltage.