ICSSSTVA DDR 14-Bit Registered Buffer. Pin Configuration. Truth Table Pin TSSOP 6.10 mm. Body, 0.50 mm. pitch = TSSOP. Block Diagram H H H
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1 DDR 14-Bit Registered Buffer Recommended Applications: DDR Memory Modules Provides complete DDR DIMM logic solution with ICS93857 or ICS95857 SSTL_2 compatible data registers DDR400 recommended (backward compatible to DDR200/266/333) Product Features: Exceeds "SSTN16857" performance Differential clock signal Meets SSTL_2 signal data Supports SSTL_2 class I & II specifications Low-voltage operation - DD = 2.3 to pin TSSOP package Truth Table 1 L s Q Outputs C LK CLK# D Q X or Floating X or Floating X or Floating H H H L Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 Pin Configuration ICSSSTA D1 D2 DD D3 D4 D5 D6 D7 CLK# CLK DD REF D8 D9 D10 D11 D12 DD D13 D14 48-Pin TSSOP 6.10 mm. Body, 0.50 mm. pitch = TSSOP H L L H L or H L or H X Q (2) 0 1. H = High Signal Level L = Low Signal Level = Transition LOW-to-HIGH = Transition HIGH -to LOW X = Irrelevant 2. Output level before the indicated steady state input conditions were established. Block Diagram CLK CLK# D1 REF R CLK D1 1 Q1 To 13 Other Channels
2 General Description The 14-bit ICSSSTA16857 is a universal bus driver designed for 2.3 to 2.7 DD operation and SSTL_2 I/O levels, except for the LCMOS input. Data flow from D to Q is controlled by the differential clock (CLK/CLK#) and a control signal (). The positive edge of CLK is used to trigger the data flow and CLK# is used to maintain sufficient noise margins where as, an LCMOS asynchronous signal, is intended for use at the time of power-up only. ICSSSTA16857 supports low-power standby operation. A logic level Low at assures that all internal registers and outputs (Q) are reset to the logic Low state, and all input receivers, data (D) and clock (CLK/CLK#) are switched off. Please note that must always be supported with LCMOS levels at a valid logic state because REF may not be stable during power-up. To ensure that outputs are at a defined logic state before a stable clock has been supplied, must be held at a logic Low level during power up. In the DDR DIMM application, is specified to be completely asynchronous with respect to CLK and CLK#. Therefore, no timing relationship can be guaranteed between the two signals. When entering a low-power standby state, the register will be cleared and the outputs will be driven to a logic Low level quickly relative to the time to disable the differential input receivers. This ensures there are no glitches on the output. However, when coming out of low-power standby state, the register will become active quickly relative to the time to enable the differential input receivers. When the data inputs are at a logic level Low and the clock is stable during the Low -to- High transition of until the input receivers are fully enabled, the design ensures that the outputs will remain at a logic Low level. Pin Configuration PIN NUMBER 24, 23, 20, 19, 18, 15, 14, 11, 10, 7, 6, 5, 2, 1 3, 8, 13, 22, 27, 36, 46 PIN NAME Q (14:1) 4, 9, 12, 16, 21 25, 26, 29, 30, 31, 32, 33, 40, 41, 42, 43, 44, 47, 48 D (14:1) 38 CLK 39 CLK# 28, 37, 45 DD REF TYPE OUTPUT PWR PWR INPUT INPUT INPUT PWR Data output Ground Output supply voltage Data input Positive clock input Negative clock input Core supply voltage I NPUT Reset (active low) INPUT reference voltage DESCRIPTION 2
3 Absolute Maximum Ratings Storage Temperature C to +150 C Supply oltage to 3.6 oltage to DD +0.5 Output oltage 1, to DDQ +0.5 Clamp Current ±50 ma Output Clamp Current ±50 ma Continuous Output Current ±50 ma DD, DDQ or Current/Pin ±100 ma Package Thermal Impedance C/W 1. The input and output negative voltage ratings may be excluded if the input and output clamp ratings are observed. 2. This current will flow only when the output is in the high state level 0 > DDQ. 3. The package thermal impedance is calculated in accordance with JESD 51. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress specifications only and functional operation of the device at these or any other conditions above those listed in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability. Recommended Operating Conditions - DDRI/DDR333 (PC1600, PC2100, PC2700) PARAMETER DESCRIPTION MIN TYP MAX UNITS DD Supply oltage DDQ I/O Supply oltage REF Reference oltage TT Termination oltage REF REF REF I oltage 0 DDQ IH (DC) DC High oltage REF IH (AC) AC High oltage REF Data s IL (DC) DC Low oltage REF IL (DC) AC Low oltage REF IH High oltage Level 1.7 IL Low oltage Level 0.7 ICR Common mode Range CLK, CLK# ID Differential oltage 0.36 Cross Point oltage of Differential Clock IX ( DDQ /2) ( DDQ /2) Pair I OH High-Level Output Current -16 ma I OL Low-Level Output Current 16 T A Operating Free-Air Temperature 0 70 C 1 Guaranteed by design, not 100% tested in production. 3
4 Recommended Operating Conditions - DDRI-400 (PC3200) PARAMETER DESCRIPTION MIN TYP MAX UNITS DD Supply oltage DDQ I/O Supply oltage REF Reference oltage TT Termination oltage REF REF REF I oltage 0 DDQ IH (DC) DC High oltage REF IH (AC) AC High oltage REF Data s IL (DC) DC Low oltage REF IL (DC) AC Low oltage REF IH High oltage Level 1.7 IL Low oltage Level 0.7 ICR Common mode Range CLK, CLK# ID Differential oltage 0.36 Cross Point oltage of Differential Clock IX ( DDQ /2) ( DDQ /2) Pair I OH High-Level Output Current -16 ma I OL Low-Level Output Current 16 T A Operating Free-Air Temperature 0 70 C 1 Guaranteed by design, not 100% tested in production. 4
5 DC Electrical Characteristics - DDRI/DDR333 (PC1600, PC2100, PC2700) T A = 0-70 C; DD = 2.5 +/-0.2, DDQ =2.5 +/-0.2; (unless otherwise stated) SYMBOL PARAMETERS CONDITIONS DDQ MIN TYP MAX UNITS IK I I = -18mA OH OL I OH = -100µA DDQ I OH = -8mA I OL = 100µA I OL = 8mA I I All s I = DD or 2.7 ±5 µa Standby (Static) = 0.01 µa I DD I = IH(AC) or IL(AC), Operating (Static) = DD 25 ma = DD, Dynamic operating I = IH(AC) or IL(AC), µ/clock 30 (clock only) CLK and CLK# switching MHz 50% duty cycle. = DD, I O = I DDD Dynamic Operating (per each data input) I = IH(AC) or IL (AC), CLK and CLK# switching 50% duty cycle. One data input switching at half clock frequency, 50% duty cycle I OH = -16mA 10 µa/ clock MHz/data r OH Output High Ω r OL Output Low I OL = 16mA Ω [r OH - r OL ] each separate bit I O = 20mA, T A = 25 C Ω C i Data s I = REF ±350m CLK and CLK# ICR = 1.25, I(PP) = 360m pf r O(D) 1 - Guaranteed by design, not 100% tested in production. 5
6 DC Electrical Characteristics - DDRI-400 (PC3200) T A = 0-70 C; DD = 2.5 +/-0.2, DDQ =2.5 +/-0.2; (unless otherwise stated) SYMBOL PARAMETERS CONDITIONS DDQ MIN TYP MAX UNITS IK I I = -18mA OH OL I OH = -100µA DDQ I OH = -8mA I OL = 100µA I OL = 8mA I I All s I = DD or 2.7 ±5 µa Standby (Static) = 0.01 µa I DD I = IH(AC) or IL(AC), Operating (Static) = DD 25 ma = DD, Dynamic operating I = IH(AC) or IL(AC), µ/clock 30 (clock only) CLK and CLK# switching MHz 50% duty cycle. = DD, I O = I DDD Dynamic Operating (per each data input) I = IH(AC) or IL (AC), CLK and CLK# switching 50% duty cycle. One data input switching at half clock frequency, 50% duty cycle I OH = -16mA 10 µa/ clock MHz/data r OH Output High Ω r OL Output Low I OL = 16mA Ω [r OH - r OL ] each separate bit I O = 20mA, T A = 25 C Ω C i Data s I = REF ±350m CLK and CLK# ICR = 1.25, I(PP) = 360m pf r O(D) 1 - Guaranteed by design, not 100% tested in production. 6
7 Timing Requirements 1 (over recommended operating free-air temperature range, unless otherwise noted) SYMBOL DDQ = 2.5 ± 0.2 PARAMETERS MIN MAX UNITS f clock Clock frequency 270 MHz t SL Output slew rate 1 4 /ns t S T h Setup time, fast slew rate 2 & ns Data before CLK, CLK# Setup time, slow slew rate 3 & ns Hold time, fast slew rate 2 & ns Hold time, slow slew rate 3 & 4 Data after CLK, CLK# 0.5 ns 1 - Guaranteed by design, not 100% tested in production. 2 - For data signal input slew rate of 1/ns. 3 - For data signal input slew rate of 0.5/ns and < 1/ns. 4 - CLK, CLK# signals input slew rate of 1/ns. Switching Characteristics - DDRI/DDR333 (PC1600, PC2100, PC2700) (over recommended operating free-air temperature range, unless otherwise noted) (see Figure 1) SYMBOL From To DD = 2.5 ±0.2 () (Output) MIN TYP MAX UNITS f max 210 MHz t PD CLK, CLK# (TSSOP) Q ns t phl Q 3.5 ns Switching Characteristics - DDRI-400 (PC3200) (over recommended operating free-air temperature range, unless otherwise noted) (see Figure 1) SYMBOL From To DD = 2.6 ±0.1 () (Output) MIN TYP MAX UNITS f max 210 MHz t PD CLK, CLK# (TSSOP) Q ns t phl Q 3.5 ns 7
8 TT From Output Under Test R L = 50Ω Test Point C L = 30 pf (see Note 1) Load Circuit LCMOS t inact DDQ /2 DDQ /2 tact DDQ 0 Timing ICR ICR I(pp) IDD (see note 2) 10% oltage and Current Waveforms s Active and Inactive Times 90% IDDH IDDL t PHL t PHL OH TT TT Output OL oltage Waveforms - Propagation Delay Times t w Timing REF REF oltage Waveforms - Pulse Duration ICR IH IL I(pp) LCMOS DD/2 t PHL IH IL t S t h Output TT OH REF REF oltage Waveforms - Setup and Hold Times IH IL OL oltage Waveforms - Propagation Delay Times Figure 1 - Parameter Measurement Information ( DDQ = 2.5 ±0.2) 1. CL incluces probe and jig capacitance. 2. I DD tested with clock and data inputs held at DDQ or, and I O = 0 ma. 3. All input pulses are supplied by generators having the following characteristics: MHz, Zo=50Ω, input slew rate = 1 /ns ±20% (unless otherwise specified). 4. The outputs are measured one at a time with one transition per measurement. 5. TT = REF = DDQ /2 6. IH = REF + 310m (AC voltage levels) for differential inputs. IH = DDQ for LCMOS input. 7. IL = REF - 310m (AC voltage levels) for differential inputs. IL = for LCMOS input. 8. t PLH and t PHL are the same as t pd 8
9 INDEX AREA A2 e N 1 2 D b E1 A1 A E c -C- - SEATING PLANE aaa C L In Millimeters In Inches SYMBOL COMMON DIMENSIONS COMMON DIMENSIONS MIN MAX MIN MAX A A A b c D E SEE ARIATIONS 8.10 BASIC SEE ARIATIONS BASIC E e 0.50 BASIC BASIC L N SEE ARIATIONS SEE ARIATIONS α aaa ARIATIONS D mm. D (inch) N MIN MAX MIN MAX Reference Doc.: JEDEC Publication 95, M O mm. Body, 0.50 mm. pitch TSSOP (240 mil) (0.020 mil) Ordering Information Example: ICSSSTA16857yGLF-T ICS XXXX y G LF- T Designation for tape and reel packaging Lead Free (Optional) Package Type G = TSSOP Revision Designator (will not correlate with datasheet revision) Device Type Prefix ICS = Standard Device 9
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