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FAST CMOS 20-BIT BUFFERS
Integrated Device Technology, Inc.
IDT54/74FCT16827AT/BT/CT/ET IDT54/74FCT162827AT/BT/CT/ET
FEATURES:
* Common features: - 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 1A (max.) - ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) - Packages include 25 mil pitch SSOP, 19.6 mil pitch TSSOP, 15.7 mil pitch TVSOP and 25 mil pitch Cerpack - Extended commercial range of -40C to +85C - VCC = 5V 10% * Features for FCT16827AT/BT/CT/ET: - 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 = 25C * Features for FCT162827AT/BT/CT/ET: - Balanced Output Drivers: 24mA (commercial), 16mA (military) - Reduced system switching noise - Typical VOLP (Output Ground Bounce) < 0.6V at VCC = 5V,TA = 25C
DESCRIPTION:
The FCT16827AT/BT/CT/ET and FCT162827AT/BT/CT/ ET 20-bit buffers are built using advanced dual metal CMOS technology. These 20-bit bus drivers provide high-performance bus interface buffering for wide data/address paths or busses carrying parity. Two pair of NAND-ed output enable controls offer maximum control flexibility and are organized to operate the device as two 10-bit buffers or one 20-bit buffer. Flow-through organization of signal pins simplifies layout. All inputs are designed with hysteresis for improved noise margin. The FCT16827AT/BT/CT/ET are ideally suited for driving high capacitance loads and low impedance backplanes. The output buffers are designed with power off disable capability to allow "live insertion" of boards when used as backplane drivers. The FCT162827AT/BT/CT/ET have balanced output drive with current limiting resistors. This offers low ground bounce, minimal undershoot, and controlled output fall times-reducing the need for external series terminating resistors. The FCT162827AT/BT/CT/ET are plug-in replacements for the FCT16827AT/BT/CT/ET and ABT16827 for on-board interface applications.
FUNCTIONAL BLOCK DIAGRAM
1OE1 1OE2
2OE1 2OE2
1A1
1Y1
2A1
2Y1
TO 9 OTHER CHANNELS
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TO 9 OTHER CHANNELS
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The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
(c)1996 Integrated Device Technology, Inc.
AUGUST 1996
DSC-2773/7
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IDT54/74FCT16827AT/BT/CT/ET, 162827AT/BT/CT/ET FAST CMOS 20-BIT BUFFERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATIONS
1OE1 1Y1 1Y2
1 2 3 4 5 6 7 8 9 10 11 12 13
56 55 54 53 52 51 50 49 48 47 46 45 44
1OE2 1A1 1A2
1OE1 1Y1 1Y2
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 CERPACK TOP VIEW E56-1
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
1OE2 1A1 1A2
GND
1Y3 1Y4
GND
1A3 1A4
GND
1Y3 1Y4
GND
1A3 1A4
VCC
1Y5 1Y6 1Y7
VCC
1A5 1A6 1A7
VCC
1Y5 1Y6 1Y7
VCC
1A5 1A6 1A7
GND
1Y8 1Y9 1Y10 2Y1 2Y2 2Y3
GND
1A8 1A9 1A10 2A1 2A2 2A3
GND
1Y8 1Y9 1Y10 2Y1 2Y2 2Y3
GND
1A8 1A9 1A10 2A1 2A2 2A3
14 SO56-1 43 SO56-2 15 SO56-3 42 16 17 18 19 20 21 22 23 24 25 26 27 28 41 40 39 38 37 36 35 34 33 32 31 30 29
GND
2Y4 2Y5 2Y6
GND
2A4 2A5 2A6
GND
2Y4 2Y5 2Y6
GND
2A4 2A5 2A6
VCC
2Y7 2Y8
VCC
2A7 2A8
VCC
2Y7 2Y8
VCC
2A7 2A8
GND
2Y9 2Y10 2OE1
GND
2A9 2A10 2OE2
GND
2Y9 2Y10 2OE1
GND
2A9 2A10 2OE2
SSOP/ TSSOP/TVSOP TOP VIEW
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IDT54/74FCT16827AT/BT/CT/ET, 162827AT/BT/CT/ET FAST CMOS 20-BIT BUFFERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
Pin Names xOEx xAx xYx Description Output Enable Inputs (Active LOW) Data Inputs 3-State Outputs
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FUNCTION TABLE(1)
xOE OE1 L L H X Inputs xOE OE2 L L X H xAx L H X X Outputs xYx L H Z Z
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ABSOLUTE MAXIMUM RATINGS
(1)
Unit V V C mA
Symbol Description Max. VTERM(2) Terminal Voltage with Respect to -0.5 to +7.0 GND VTERM(3) Terminal Voltage with Respect to -0.5 to GND VCC +0.5 TSTG Storage Temperature -65 to +150 IOUT DC Output Current -60 to +120
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High Impedance
CAPACITANCE (TA = +25C, f = 1.0MHz)
Symbol Parameter(1) CIN Input Capacitance COUT Output Capacitance Conditions VIN = 0V VOUT = 0V Typ. 3.5 3.5 Max. Unit 6.0 pF 8.0
pF
2773 lnk 03 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 FCT162XXXT Output and I/O terminals. 3. Output and I/O terminals for FCT162XXXT.
NOTE: 1. This parameter is measured at characterization but not tested.
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IDT54/74FCT16827AT/BT/CT/ET, 162827AT/BT/CT/ET FAST CMOS 20-BIT BUFFERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Commercial: TA = -40C to +85C, VCC = 5.0V 10%; Military: TA = -55C to +125C, VCC = 5.0V 10%
Symbol VIH VIL II H II L 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) VCC = Max. VCC = Min., IIN = -18mA VCC = Max., VO = GND (3)
--
Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VI = VCC VI = GND VO = 2.7V VO = 0.5V
Min. 2.0 -- -- -- -- -- -- -- -- -80 -- --
Typ.(2) --
-- -- -- -- -- -- -- -0.7 -140
Max.
--
Unit V V A
0.8 1 1 1 1 1 1
-1.2 -225 --
Input LOW Current (I/O pins)(5) High Impedance Output Current (3-State Output pins) (5) Clamp Diode Voltage Short Circuit Current Input Hysteresis Quiescent Power Supply Current
A V mA mV A
100 5
VCC = Max., VIN = GND or VCC
500
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OUTPUT DRIVE CHARACTERISTICS FOR FCT16827T
Symbol IO VOH Parameter Output Drive Current Output HIGH Voltage Test Conditions(1) VCC = Max., VO = 2.5V(3) VCC = Min. VIN = VIH or VIL IOH = -3mA IOH = -12mA MIL. IOH = -15mA COM'L. IOH = -24mA MIL. IOH = -32mA COM'L.(4) VCC = Min. IOL = 48mA MIL. VIN = VIH or VIL IOL = 64mA COM'L. VCC = 0V, VIN or VO 4.5V Min. -50 2.5 2.4 2.0 -- -- Typ.(2)
--
Max.
-180
Unit mA V V V V
3.5 3.5 3.0 0.2 --
-- -- -- 0.55
VOL IOFF
Output LOW Voltage Input/Output Power Off Leakage(5)
1
A
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OUTPUT DRIVE CHARACTERISTICS FOR FCT162827T
Symbol IODL IODH VOH VOL Parameter Output LOW Current Output HIGH Current Output HIGH Voltage Output LOW Voltage Test Conditions(1) VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V (3) VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3) VCC = Min. VIN = VIH or VIL VCC = Min. VIN = VIH or VIL IOH = -16mA MIL. IOH = -24mA COM'L. IOL = 16mA MIL. IOL = 24mA COM'L. Min. 60 -60 2.4 -- Typ.(2) 115 -115 3.3 0.3 Max. 200 -200 -- 0.55 Unit mA mA V V
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NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at Vcc = 5.0V, +25C ambient. 3. Not more than one output should be tested at one time. Duration of the test should not exceed one second. 4. Duration of the condition can not exceed one second. 5. The test limit for this parameter is 5A at TA = -55C.
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IDT54/74FCT16827AT/BT/CT/ET, 162827AT/BT/CT/ET FAST CMOS 20-BIT BUFFERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol ICC ICCD Parameter Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current (4) Test Conditions(1) VCC = Max. VIN = 3.4V(3) VCC = Max. Outputs Open xOE1 = xOE2 = GND One Input Toggling 50% Duty Cycle VCC = Max. Outputs Open fi = 10MHz 50% Duty Cycle xOE1 = xOE2 = GND One Bit Toggling VCC = Max. Outputs Open fi = 2.5MHz 50% Duty Cycle xOE1 = xOE2 = GND Twenty Bits Toggling Min. -- -- Typ.(2) 0.5 60 Max. 1.5 100 Unit mA A/ MHz
VIN = VCC VIN = GND
IC
Total Power Supply Current (6)
VIN = VCC VIN = GND VIN = 3.4V VIN = GND VIN = VCC VIN = GND VIN = 3.4V VIN = GND
--
0.6
1.5
mA
--
0.9
2.3
--
3.0
5.5 (5)
--
8.0
20.5 (5)
NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25C ambient. 3. Per TTL driven input (VIN = 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. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCPNCP/2 + fiNi) ICC = Quiescent Current (ICCL, ICCH and ICCZ) ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) NCP = Number of Clock Inputs at fCP fi = Input Frequency Ni = Number of Inputs at fi
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IDT54/74FCT16827AT/BT/CT/ET, 162827AT/BT/CT/ET FAST CMOS 20-BIT BUFFERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT16827AT/162827AT Com'l. Symbol Parameter Condition(1) Min.(2) Max. Mil. Min.(2) Max. FCT16827BT/162827BT Com'l. Min.(2) Max. Mil. Min.(2) Max. Unit
tPLH tPHL
Propagation Delay xAx to xYx
tPZH tPZL
Output Enable Time xOEx to xYx
tPHZ tPLZ
Output Disable Time xOEx to xYx
CL = 50pF RL = 500 CL = 300pF(4) RL = 500 CL = 50pF RL = 500 CL = 300pF(4) RL = 500 CL = 5pF(4) RL = 500 CL = 50pF RL = 500
1.5 1.5 1.5 1.5 1.5 1.5 --
8.0 15.0 12.0 23.0 9.0 10.0 0.5
1.5 1.5 1.5 1.5 1.5 1.5 --
9.0 17.0 13.0 25.0 9.0 10.0 0.5
1.5 1.5 1.5 1.5 1.5 1.5 --
5.0 13.0 8.0 15.0 6.0 7.0 0.5
1.5 1.5 1.5 1.5 1.5 1.5 --
6.5 14.0 9.0 16.0 7.0 8.0 0.5
ns
ns
ns
tSK(o) Output Skew (3)
ns
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FCT16827CT/162827CT Com'l. Symbol Parameter Condition(1) Min.(2) Max. Mil. Min.(2) Max.
FCT16827ET/162827ET Com'l. Min.(2) Max. Mil. Min.(2) Max. Unit
tPLH tPHL
Propagation Delay xAx to xYx
tPZH tPZL
Output Enable Time xOEx to xYx
tPHZ tPLZ
Output Disable Time xOEx to xYx
CL = 50pF RL = 500 CL = 300pF(4) RL = 500 CL = 50pF RL = 500 CL = 300pF(4) RL = 500 CL = 5pF(4) RL = 500 CL = 50pF RL = 500
1.5 1.5 1.5 1.5 1.5 1.5 --
4.4 10.0 7.0 14.0 5.7 6.0 0.5
1.5 1.5 1.5 1.5 1.5 1.5 --
5.0 11.0 8.0 15.0 6.7 7.0 0.5
1.5 1.5 1.5 1.5 1.5 1.5 --
3.2 7.0 4.8 9.0 4.0 4.0 0.5
-- -- -- -- -- -- --
-- -- -- -- -- -- --
ns
ns
ns
tSK(o) Output Skew (3)
ns
2773 tbl 10
NOTES: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design. 4. This condition is guaranteed but not tested.
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IDT54/74FCT16827AT/BT/CT/ET, 162827AT/BT/CT/ET FAST CMOS 20-BIT BUFFERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS TEST CIRCUITS FOR ALL OUTPUTS
V CC 500 VIN Pulse Generator RT D.U.T. 50pF CL 500 VOUT 7.0V
SWITCH POSITION
Test Open Drain Disable Low Enable Low All Other Tests Open
2773 lnk 11 DEFINITIONS: CL= Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
Switch
Closed
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SET-UP, HOLD AND RELEASE TIMES
PULSE WIDTH
DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC. tSU
tH
3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V
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LOW-HIGH-LOW PULSE tW HIGH-LOW-HIGH PULSE
1.5V
tREM
1.5V
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tSU
tH
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE DISABLE 3V 1.5V tPZL OUTPUT NORMALLY LOW OUTPUT NORMALLY HIGH SWITCH CLOSED tPZH SWITCH OPEN 1.5V 0V 3.5V 1.5V tPHZ 0.3V VOH 0V
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SAME PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL tPHL
3V 1.5V 0V VOH 1.5V VOL 3V 1.5V 0V
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CONTROL INPUT tPLZ
0V 3.5V 0.3V VOL
NOTES: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH 2. Pulse Generator for All Pulses: Rate 1.0MHz; tF 2.5ns; tR 2.5ns
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IDT54/74FCT16827AT/BT/CT/ET, 162827AT/BT/CT/ET FAST CMOS 20-BIT BUFFERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
IDT XX XXXX FCT Temp. Range Device Type X Package X Process Blank B PV PA PF E Commercial MIL-STD-883, Class B Shrink Small Outline Package (SO56-1) Thin Shrink Small Outline Package (SO56-2) Thin Very Small Outline Package (SO56-3) CERPACK (E56-1)
16827AT Non-Inverting 20-Bit Buffers 16827BT 16827CT 16827ET 162827AT 162827BT 162827CT 162827ET 54 74 -55C to +125C -40C to +85C
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