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| IDT74SSTV16857 14-BIT REGISTERED BUFFER WITH SSTL I/O INDUSTRIAL TEMPERATURE RANGE 14-BIT REGISTERED BUFFER WITH SSTL I/O IDT74SSTV16857 PRELIMINARY FEATURES: * * * * * * * * 2.3V to 2.7V Operation SSTL_2 Class II style data inputs/outputs Differential CLK input RESET control compatible with LVCMOS levels Flow-through architecture for optimum PCB design Drive up to equivalent of 14 SDRAM loads Latch-up performance exceeds 100mA ESD >2000V per MIL-STD-883, Method 3015; >200V using machine model (C = 200pF, R = 0) * Available in TSSOP package DESCRIPTION: The SSTV16857 is a 14-bit registered buffer designed for 2.3V-2.7V VDD and supports low standby operation. All data inputs and outputs are SSTL_2 level compatible with JEDEC standard for SSTL_2. RESET is an LVCMOS input since it must operate predictably during the power-up phase. RESET, which can be operated independent of CLK and CLK, must be held in the low state during power-up in order to ensure predictable outputs (low state) before a stable clock has been applied. RESET, when in the low state, will disable all input receivers, reset all registers, and force all outputs to a low state, before a stable clock has been applied. With inputs held low and a stable clock applied, outputs will remain low during the Low-to-High transition of RESET. APPLICATIONS: * Ideally suited for DIMM DDR registered applications FUNCTIONAL BLOCK DIAGRAM RESET 34 CK CK 38 39 VREF 35 D1 48 1D 1 C1 R Q1 TO 13 OTHER CHANNELS INDUSTRIAL TEMPERATURE RANGE 1 c 2003 Integrated Device Technology, Inc. The IDT logo is a registered trademark of Integrated Device Technology, Inc. MAY 2003 DSC-5737/2 IDT74SSTV16857 14-BIT REGISTERED BUFFER WITH SSTL I/O INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION Q1 Q2 GND VDDQ Q3 Q4 Q5 GND VDDQ Q6 Q7 VDDQ GND Q8 Q9 VDDQ GND Q10 Q11 Q12 VDDQ GND Q13 Q14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 D1 D2 GND VDD D3 D4 D5 D6 D7 CLK CLK VDD GND ABSOLUTE MAXIMUM RATINGS(1) Symbol VI (2) Description Input Voltage Range Output Voltage Range Input Clamp Current, VI < 0 Output Clamp Current, VO < 0 or VO > VDDQ Continuous Output Current, VO = 0 to VDDQ Continuous Current through each VDD, VDDQ or GND Storage Temperature Range Max. -0.5 to 3.6 -0.5 to VDD +0.5 -0.5 to VDDQ +0.5 -50 50 50 100 -65 to +150 Unit V V V mA mA mA mA C VDD or VDDQ Supply Voltage Range VO(3) IIK IOK IO VDD TSTG VREF RESET D8 D9 D10 D11 D12 VDD GND D13 D14 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. The input and output negative voltage ratings may be exceeded if the ratings of the I/P and O/P clamp current are observed. 3. The output current will flow if the following conditions are observed: a) Output in HIGH state b) VO = VDDQ FUNCTION TABLE(1) Input RESET H H H L CLK L or H X CLK L or H X D L H X X Q Outputs L H Q(2) L TSSOP TOP VIEW NOTES: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care = LOW to HIGH = HIGH to LOW 2. Q = Output level before the indicated steady-state conditions were established. 2 IDT74SSTV16857 14-BIT REGISTERED BUFFER WITH SSTL I/O INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = -40C to +85C, VDD = 2.5V 0.2V, VDDQ = 2.5V 0.2V Symbol VIK VOH VOL II IDD IDDD All Inputs Static Standby Static Operating Dynamic Operating (Clock Only) Dynamic Operating (Per Each Data Input) rOH rOL rO() CI Output HIGH Output LOW | rOH- rOL| each separate bit Data Inputs CLK and CLK RESET Parameter Control Inputs Test Conditions VDD = 2.3V, II = -18mA VDD = 2.3V to 2.7V, IOH = -100A VDD = 2.3V, IOH = -16mA VDD = 2.3V to 2.7V, IOL = 100A VDD = 2.3V, IOL = 16mA VDD = 2.7V, VI = VDD or GND IO = 0, VDD = 2.7V, RESET = GND IO = 0, VDD = 2.7V, RESET = VDD, VI = VIH (AC) or VIL (AC) IO = 0, VDD = 2.7V, RESET = VDD, VI = VIH (AC) or VIL (AC), CLK and CLK Switching 50% Duty Cycle. IO = 0, VDD = 2.7V, RESET = VDD, VI = VIH (AC) or VIL (AC), CLK and CLK Switching 50% Duty Cycle. One Data Input Switching at Half Clock Frequency, 50% Duty Cycle. VDD = 2.3V to 2.7V, IOH = -20mA VDD = 2.3V to 2.7V, IOH = 20mA VDD = 2.5V, TA = 25C, IOH = -20mA VDD = 2.5V, VI = VREF 310mV VICR = 1.25V, VI (PP) = 360mV VI = VDD or GND 7 7 -- 2.5 2.5 -- -- -- -- -- -- -- 20 20 4 3.5 3.5 -- pF -- -- -- Min. -- VDD - 0.2 1.95 -- -- -- -- -- -- Typ. -- -- -- -- -- -- -- -- -- Max. -1.2 -- -- 0.2 0.35 5 0.01 -- -- A/Clock MHz A/Clock MHz/Data Input A mA V Unit V V OPERATING CHARACTERISTICS, TA = 25C(1) Symbol VDD VDDQ VREF VTT VI VIH VIL VIH VIL VIH VIL VICR VI (PP) IOH IOL TA NOTE: 1. The RESET input of the device must be held at VDD or GND to ensure proper device operation. Parameter Supply Voltage Output Supply Voltage Reference Voltage (VREF= VDDQ/2) Termination Voltage Input Voltage AC High-Level Input Voltage AC Low-Level Input Voltage DC High-Level Input Voltage DC Low-Level Input Voltage High-Level Input Voltage Low-Level Input Voltage Common-Mode Input Range Peak-to-Peak Input Voltage High-Level Output Current Low-Level Output Current Operating Free-Air Temperature Data Inputs Data Inputs Data Inputs Data Inputs RESET RESET CLK, CLK CLK, CLK Min. VDDQ 2.3 1.15 VREF- 40mV 0 VREF+ 310mV -- VREF+ 150mV -- 1.7 -- 0.97 360 -- -- - 40 Typ. -- 2.5 1.25 VREF -- -- -- -- -- -- -- -- -- -- -- -- Max. 2.7 2.7 1.35 VREF+ 40mV VDD -- VREF- 310mV -- VREF- 150mV -- 0.7 1.53 -- - 20 20 +85 Unit V V V V V V V V V V V V mV mA C 3 IDT74SSTV16857 14-BIT REGISTERED BUFFER WITH SSTL I/O INDUSTRIAL TEMPERATURE RANGE TIMING REQUIREMENTS OVER RECOMMENDED OPERATING FREE-AIR TEMPERATURE RANGE VDD = 2.5V 0.2V Symbol CLOCK Parameter Clock Frequency Pulse Duration, CLK, CLK HIGH or LOW Setup Time, Fast Slew Rate Hold Time, Fast Slew Rate (1, 2) Min. -- 2.5 Data Before CLK, CLK Data Before CLK, CLK 0.75 0.9 0.75 0.9 Max. 200 -- -- -- -- -- Unit MHz ns ns ns ns ns tw tSU tN Setup Time, Slow Slew Rate(2, 3) (1, 2) Hold Time, Slow Slew Rate(2) NOTES: 1. For data signal input slew rate is 1V/ns. 2. CLK, CLK signal input slew rates are 1V/ns. 3. For data signal input slew rate is 0.5V/ns and <1V/ns. SWITCHING CHARACTERISTICS OVER RECOMMENDED FREE-AIR OPERATING RANGE (UNLESS OTHERWISE NOTED) VDD = 2.5V 0.2V Symbol fMAX tPD tPHL Parameter CLK and CLK to Q RESET to Q Min 200 1.1 -- Max. -- 2.8 5 Unit MHz ns ns 4 IDT74SSTV16857 14-BIT REGISTERED BUFFER WITH SSTL I/O INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS (VDD = 2.5V 0.2V) VTT RL = 50 From Output Under Test Test Point CL = 30 pF (see note 1) Load Circuit tW VIH Input VREF VREF VIL Timing Input tPLH VICR VICR tPHL VI(PP) VOH Voltage Waveforms - Pulse Duration Output VTT VTT VOL Voltage Waveforms - Propagation Delay Times Timing Input tSU Input VREF VICR VI(PP) LVCMOS RESET Input VIH VDD/2 VIL tPHL tN VIH VREF VIL Output VOH VTT VOL Voltage Waveforms - Setup and Hold Times Voltage Waveforms - Propagation Delay Times NOTES: 1. CL includes probe and jig capacitance. 2. IDD tested with clock and data inputs held at VDD or GND, and IO = 0mA. 3. All input pulses are supplied by generators having the following characteristics: PRR 10MHz, ZO = 50, input slew rate = 1 V/ns 20% (unless otherwise specified). 4. The outputs are measured one at a time with one transition per measurement. 5. VTT = VREF = VDDQ/2 6. VIH = VREF + 310mV (AC voltage levels) for differential inputs. VIH = VDD for LVCMOS input. 7. VIL = VREF - 310mV (AC voltage levels) for differential inputs. VIL = GND for LVCMOS input. 8. tPLH and tPHL are the same as tPD. 5 IDT74SSTV16857 14-BIT REGISTERED BUFFER WITH SSTL I/O INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDT XX XX SSTV Temp. Range Family XXXX XX Device Type Package PA Thin Shrink Small Outline Package 857 14-Bit Registered Buffer with SSTL I/O 16 74 Double-Density -40C to +85C CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com for Tech Support: logichelp@idt.com (408) 654-6459 6 |
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