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IDT74ALVCH16721 3.3V CMOS 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
3.3V CMOS 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS AND BUS-HOLD
FEATURES: DESCRIPTION:
IDT74ALVCH16721
* 0.5 MICRON CMOS Technology * Typical tSK(o) (Output Skew) < 250ps * ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) * VCC = 3.3V 0.3V, Normal Range * VCC = 2.7V to 3.6V, Extended Range * VCC = 2.5V 0.2V * CMOS power levels (0.4 W typ. static) * Rail-to-Rail output swing for increased noise margin * Available in SSOP, TSSOP, and TVSOP packages
DRIVE FEATURES:
* High Output Drivers: 24mA * Low switching noise
APPLICATIONS:
* 3.3V high speed systems * 3.3V and lower voltage computing systems
This 20-bit flip-flop is built using advanced dual metal CMOS technology. The 20 flip-flops of the ALVCH16721 are edge-triggered D-type flip-flops with qualified clock storage. On the positive transition of the clock (CLK) input, the device provides true data at the Q outputs if the clock-enable (CLKEN) input is low. If CLKEN is high, no data is stored. A buffered output-enable (OE) input places the 20 outputs in either a normal logic state (high or low) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The highimpedance state and increased drive provide the capability to drive bus lines without need for interface or pullup components. OE does not affect the internal operation of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The ALVCH16721 has been designed with a 24mA output driver. This driver is capable of driving a moderate to heavy load while maintaining speed performance. The ALVCH16721 has "bus-hold" which retains the inputs' last state whenever the input goes to a high impedance. This prevents floating inputs and eliminates the need for pull-up/down resistor.
FUNCTIONAL BLOCK DIAGRAM
OE
1
CLK
56
CLKEN
29
CE C1
2
Q1
D1
55
1D
TO 19 OTH ER C HAN NELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
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(c) 1999 Integrated Device Technology, Inc.
APRIL 1999
DSC-4747/1
IDT74ALVCH16721 3.3V CMOS 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
OE Q1 Q2 GND Q3 Q4 VCC Q5 Q6 Q7 GND Q8 Q9 Q10 Q11 Q12 Q13 GND Q14 Q15 Q16 VCC Q17 Q18 GND Q19 Q20 NC 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 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 CLK D1 D2 GND D3 D4 VCC D5 D6 D7 GND D8 D9 D10 D11 D12 D13 GND D14 D15 D16 VCC D17 D18 GND D19 D20 CLKEN
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Description Max VTERM(2) VTERM(3) TSTG IOUT IIK IOK ICC ISS Terminal Voltage with Respect to GND Terminal Voltage with Respect to GND Storage Temperature DC Output Current Continuous Clamp Current, VI < 0 or VI > VCC Continuous Clamp Current, VO < 0 Continuous Current through each VCC or GND -0.5 to +4.6 -0.5 to VCC+0.5 -65 to +150 -50 to +50 50 -50 100
Unit V V C mA mA mA mA
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. VCC terminals. 3. All terminals except VCC.
CAPACITANCE (TA = +25C, F = 1.0MHz)
Symbol CIN COUT CI/O Parameter(1) Input Capacitance Output Capacitance I/O Port Capacitance Conditions VIN = 0V VOUT = 0V VIN = 0V Typ. 5 7 7 Max. 7 9 9 Unit pF pF pF
NOTE: 1. As applicable to the device type.
PIN DESCRIPTION
Pin Names OE Dx Qx CLK CLKEN NC Description 3-State Output Enable Input (Active LOW) Data Inputs(1) 3-State Outputs Clock Input Clock Enable Input (Active LOW) No Internal Connection
SSOP/ TSSOP/ TVSOP TOP VIEW
NOTE: 1. These pins have "Bus-Hold". All other pins are standard inputs, outputs, or I/Os.
FUNCTION TABLE (EACH FLIP-FLOP)(1)
Inputs OE L L L L H CLKEN H L L L X CLK X L or H X Dx X H L X X Output Qx Q0(2) H L Q0(2) Z
NOTES: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High Impedance = LOW-to-HIGH transition 2. Output level before the indicated steady-state input conditions were established.
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IDT74ALVCH16721 3.3V CMOS 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = -40C to +85C
Symbol VIH VIL IIH IIL IOZH IOZL VIK VH ICCL ICCH ICCZ ICC Parameter Input HIGH Voltage Level Input LOW Voltage Level Input HIGH Current Input LOW Current High Impedance Output Current (3-State Output pins) Clamp Diode Voltage Input Hysteresis Quiescent Power Supply Current VCC = 2.3V, IIN = -18mA VCC = 3.3V VCC = 3.6V VIN = GND or VCC One input at VCC - 0.6V, other inputs at VCC or GND VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 3.6V VCC = 3.6V VCC = 3.6V VI = VCC VI = GND VO = VCC VO = GND Test Conditions Min. 1.7 2 -- -- -- -- -- -- -- -- -- Typ.(1) -- -- -- -- -- -- -- -- -0.7 100 0.1 Max. -- -- 0.7 0.8 5 5 10 10 -1.2 -- 40 V mV A A A A V Unit V
Quiescent Power Supply Current Variation
--
--
750
A
NOTE: 1. Typical values are at VCC = 3.3V, +25C ambient.
BUS-HOLD CHARACTERISTICS
Symbol IBHH IBHL IBHH IBHL IBHHO IBHLO
NOTES: 1. Pins with Bus-Hold are identified in the pin description. 2. Typical values are at VCC = 3.3V, +25C ambient.
Parameter(1) Bus-Hold Input Sustain Current Bus-Hold Input Sustain Current Bus-Hold Input Overdrive Current VCC = 3V VCC = 2.3V VCC = 3.6V
Test Conditions VI = 2V VI = 0.8V VI = 1.7V VI = 0.7V VI = 0 to 3.6V
Min. - 75 75 - 45 45 --
Typ.(2) -- -- -- -- --
Max. -- -- -- -- 500
Unit A A A
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IDT74ALVCH16721 3.3V CMOS 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
OUTPUT DRIVE CHARACTERISTICS
Symbol VOH Parameter Output HIGH Voltage VCC = 2.3V VCC = 2.3V VCC = 2.7V VCC = 3V VCC = 3V VOL Output LOW Voltage VCC = 2.3V to 3.6V VCC = 2.3V VCC = 2.7V VCC = 3V IOH = - 24mA IOL = 0.1mA IOL = 6mA IOL = 12mA IOL = 12mA IOL = 24mA Test Conditions(1) VCC = 2.3V to 3.6V IOH = - 0.1mA IOH = - 6mA IOH = - 12mA Min. VCC - 0.2 2 1.7 2.2 2.4 2 -- -- -- -- -- Max. -- -- -- -- -- -- 0.2 0.4 0.7 0.4 0.55 V Unit V
NOTE: 1. VIH and VIL must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate VCC range. TA = - 40C to + 85C.
OPERATING CHARACTERISTICS, TA = 25C
VCC = 2.5V 0.2V Symbol CPD CPD Parameter Power Dissipation Capacitance Outputs enabled Power Dissipation Capacitance Outputs disabled Test Conditions CL = 0pF, f = 10Mhz Typical 55 46 VCC = 3.3V 0.3V Typical 59 49 Unit pF
SWITCHING CHARACTERISTICS(1)
VCC = 2.5V 0.2V Symbol fMAX tPLH tPHL tPZH tPZL tPHZ tPLZ tSU tSU tH tH tW tSK(O) Propagation Delay CLK to Qx Output Enable Time OE to Qx Output Disable Time OE to Qx Set-up Time, data before CLK Set-up Time, CLKEN before CLK Hold Time, data after CLK Hold Time, CLKEN after CLK Pulse Width, CLK HIGH or LOW Output Skew(2) 4 3.4 0 0 3.3 -- -- -- -- -- -- -- 3.6 3.1 0 0 3.3 -- -- -- -- -- -- -- 3.1 2.7 0 0 3.3 -- -- -- -- -- -- 500 ns ns ns ns ns ps 1 5.5 1 4.7 1 4.4 ns 1 6.1 1 5.8 1 4.8 ns Parameter Min. 150 1 Max. -- 5.6 VCC = 2.7V Min. 150 1 Max. -- 5.1 VCC = 3.3V 0.3V Min. 150 1 Max. -- 4.3 Unit MHz ns
NOTES: 1. See TEST CIRCUITS AND WAVEFORMS. TA = - 40C to + 85C. 2. Skew between any two outputs of the same package and switching in the same direction.
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IDT74ALVCH16721 3.3V CMOS 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS TEST CONDITIONS
Symbol VLOAD VIH VT VLZ VHZ CL VCC(1)= 3.3V0.3V VCC(1)= 2.7V 6 2.7 1.5 300 300 50 6 2.7 1.5 300 300 50 VCC(2)= 2.5V0.2V 2 x Vcc Vcc Vcc / 2 150 150 30 Unit V V V mV mV pF
SAME PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL tPHL
VIH VT 0V VOH VT VOL VIH VT 0V
ALVC Link
Propagation Delay
ENABLE CONTROL INPUT tPZL OUTPUT SWITCH NORMALLY CLOSED LOW tPZH OUTPUT SWITCH NORMALLY OPEN HIGH VLOAD/2 VT tPHZ VT 0V tPLZ DISABLE VIH VT 0V VLOAD/2 VLZ VOL VOH VHZ 0V
ALVC Link
VCC 500 Pulse Generator
(1, 2)
VLOAD Open GND
VIN D.U.T. RT
VOUT
500 CL
ALVC Link
Test Circuit for All Outputs
DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. NOTES: 1. Pulse Generator for All Pulses: Rate 1.0MHz; tF 2.5ns; tR 2.5ns. 2. Pulse Generator for All Pulses: Rate 1.0MHz; tF 2ns; tR 2ns.
NOTE: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
Enable and Disable Times
DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL SYNCHRONOUS CONTROL
tSU
SWITCH POSITION
Test Open Drain Disable Low Enable Low Disable High Enable High All Other Tests Switch VLOAD GND Open
tH
tREM
tSU
tH
VIH VT 0V VIH VT 0V VIH VT 0V VIH VT 0V
ALVC Link
INPUT
tPLH1
tPHL1
VIH VT 0V VOH VT VOL VOH VT VOL
Set-up, Hold, and Release Times
OUTPUT 1
LOW-HIGH-LOW PULSE tW HIGH-LOW-HIGH PULSE
VT
tSK (x)
tSK (x)
OUTPUT 2 tPLH2 tPHL2
VT
ALVC Link
tSK(x) = tPLH2 - tPLH1 or tPHL2 - tPHL1
ALVC Link
Pulse Width
Output Skew - tSK(X)
NOTES: 1. For tSK(o) OUTPUT1 and OUTPUT2 are any two outputs. 2. For tSK(b) OUTPUT1 and OUTPUT2 are in the same bank.
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IDT74ALVCH16721 3.3V CMOS 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT ALVC X XX Bus-Hold Temp. Range XXX Family XXX XX Device Type Package
PV PA PF 721 16 H 74
Shrink Small Outline Package Thin Shrink Small Outline Package Thin Very Small Outline Package 20-Bit Flip-Flop with 3-State Outputs Double-Density, 24mA Bus-Hold -40C to +85C
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for Tech Support: logichelp@idt.com (408) 654-6459
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