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Integrated Circuit Systems, Inc.
ICS9148-58
Frequency Generator & Integrated Buffers for PENTIUM/ProTM
General Description
The ICS9148-58 is the single chip clock solution for Desktop/ Notebook designs using the VIA MVP3 style chipset. It provides all necessary clock signals for such a system. Spread spectrum may be enabled through I2C programming. Spread spectrum typically reduces system EMI by 8dB to 10dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS9148-58 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations. Serial programming I C interface allows changing functions, stop clock programming and frequency selection. The SD_SEL latched input allows the SDRAM frequency to follow the CPUCLK frequency(SD_SEL=1) or the AGP clock frequency(SD_SEL=0)
2
Features
Generates the following system clocks: - 4 CPU(2.5V/3.3V) upto 100MHz. - 6 PCI(3.3V) @ 33.3MHz - 2AGP(3.3V) @ 2 x PCI - 12 SDRAMs(3.3V) @ either CPU or AGP - 2 REF (3.3V) @ 14.318MHz Skew characteristics: - CPU CPU<250ps - SDRAM SDRAM < 250ps - CPU SDRAM < 250ps - CPU(early) PCI : 1-4ns Spread Spectrum 0 to -5% down spread. Serial I2C interface for Power Management, Frequency Select, Spread Spectrum. Efficient Power management scheme through PCI and CPU STOP CLOCKS. Uses external 14.318MHz crystal 48 pin 300mil SSOP.

Block Diagram
Pin Configuration
Power Groups
VDD1 = REF (0:1), X1, X2 VDD2 = PCICLK_F, PCICLK(0:5) VDD3 = SDRAM (0:11), supply for PLL core, 24 MHz, 48MHz VDD4 = AGP (0:1) VDDL = CPUCLK (0:3)
9148-58 Rev C 12/07/98
48-Pin SSOP
* Internal Pull-up Resistor of 240K to 3.3V on indicated inputs
Pentium is a trademark of Intel Corporation I2C is a trademark of Philips Corporation
ICS reserves the right to make changes in the device data identified in this publication without further notice. ICS advises its customers to obtain the latest version of all device data to verify that any information being relied upon by the customer is current and accurate.
ICS9148-58
Pin Descriptions
PIN NUMBER 1 2 3,9,16,22,27, 33,39,45 4 5 6,14 7 FS11, 2 PCICLK0 8 10, 11, 12, 13 15, 47 FS2
1, 2
PIN NAME VDD1 REF0 CPU3.3#_2.5 1,2 GND X1 X2 VDD2 PCICLK_F
TYPE PWR OUT IN PWR IN OUT PWR OUT IN OUT IN OUT OUT IN OUT IN OUT OUT PWR IN IN OUT IN OUT IN OUT PWR OUT IN PWR
DESCRIPTION Ref (0:2), XTAL power supply, nominal 3.3V 14.318 MHz reference clock. Indicates whether VDDL2 is 3.3V or 2.5V. High=2.5V CPU, LOW=3.3V CPU1. Latched input2 Ground Crystal input, has internal load cap (33pF) and feedback resistor from X2 Crystal output, nominally 14.318MHz. Has internal load cap (33pF) Supply for PCICLK_F and PCICLK (0:5), nominal 3.3V Free running PCI clock output. Synchrounous with CPUCLKs with 1-4ns skew (CPU early) This is not affected by PCI_STOP# Frequency select pin. Latched Input. Along with other FS pins determins the CPU, SDRAM, PCI & AGP frequencies. PCI clock output. Synchrounous CPUCLKs with 1-4ns skew (CPU early) Frequency select pin. Latched Input Along with other FS pins determins the CPU, SDRAM, PCI & AGP frequencies. PCI clock outputs. Synchrounous CPUCLKs with 1-4ns skew (CPU early) Advanced Graphic Port outputs, powered by VDD4. This asyncheronous input halts CPUCLK (0:3) and AGP (0:1) clocks at logic 0 level, when input low (in Mobile Mode, MODE=0) SDRAM clock output. Frequency is selected by the SD_SEL latched input. SD_SEL = 1 at power on causes SDRAM frequency = CPU frenquencies SD_SEL = 0 at power on causes SDRAM frequencies = AGP frequencies This asyncheronous input halts PCICLK(0:5) clocks at logic 0 level, when input low (In mobile mode, MODE=0) SDRAM clock output. Frequency is selected by the SD_SEL latched input. SD_SEL = 1 at power on causes SDRAM frequency = CPU frenquencies SD_SEL = 0 at power on causes SDRAM frequencies = AGP frequencies SDRAM clock outputs. Frequency is selected by the SD_SEL latched input. SD_SEL = 1 at power on causes SDRAM frequency = CPU frenquencies SD_SEL = 0 at power on causes SDRAM frequencies = AGP frequencies Supply for SDRAM (0:11), CPU Core and 24, 48MHz clocks, nominal 3.3V. Data input for I2C serial input. Clock input of I2C input 24MHz output clock, for Super I/O timing. Pin 17, pin 18 function select pin, 1=Desktop Mode, 0=Mobile Mode. Latched Input. 48MHz output clock, for USB timing. Frequency select pin. Latched Input Along with other FS pins determins the CPU, SDRAM, PCI & AGP frequencies. CPU clock outputs, powered by VDDL2. Low if CPU_STOP#=Low Supply for CPU (0:3), either 2.5V or 3.3V nominal 14.318MHz reference clock. Latched input at Power On selects either CPU (SDSEL=1) or AGP (SD_SEL=0) frequencies for the SDRAM clock outputs. Supply for AGP (0:1)
PCICLK(1:4) AGP (0:1) CPU_STOP#1
17 SDRAM 11 PCI_STOP#1 18 SDRAM 10 20, 21,28, 29, 31, 32, 34, 35,37,38 19,30,36 23 24 25 SDRAM (0:9) VDD3 SDATA SCLK 24MHz MODE1, 2 48MHz 26 40, 41, 43, 44 42 46 48 FS0
1, 2
CPUCLK(0:3) VDDL REF1 SD_SEL VDD4
Notes: 1: Internal Pull-up Resistor of 240K to 3.3V on indicated inputs 2: Bidirectional input/output pins, input logic levels are latched at internal power-on-reset. Use 10Kohm resistor to program logic Hi to VDD or GND for logic low.
2
ICS9148-58
Mode Pin - Power Management Input Control
MODE, Pin 25 (Latched Input) 0 1 Pin 17 CPU_STOP# (INPUT) SDRAM 11 (OUTPUT) Pin 18 PCI_STOP# (INPUT) SDRAM 10 (OUTPUT)
Power Management Functionality
CPU_STOP# PCI_STOP# AGP, CPUCLK Outputs Stopped Low Running Running PCICLK (0:5) Running Running Stopped Low PCICLK_F, REF, 24/48MHz and SDRAM Running Running Running Crystal OSC Running Running Running VCO
0 1 1
1 1 0
Running Running Running
CPU 3.3#_2.5V Buffer selector for CPUCLK drivers.
CPU3.3#_2.5 Input level (Latched Data) 1 0 Buffer Selected for operation at: 2.5V VDD 3.3V VDD
Functionality
VDD1, 2, 3, 4 = 3.3V5%, VDDL = 2.5V 5% or 3.3 5%, TA= 0 to 70C Crystal (X1, X2) = 14.31818MHz
FS2 1 1 1 1 0 0 0 0 FS1 1 1 0 0 1 1 0 0 FS0 1 0 1 0 1 0 1 0 CPU (M H z) 1 0 0 .2 9 5 .2 5 8 3 .3 1 3 3 .3 75 124 6 6 .8 11 2 S D R A M (M H z) S D _ S EL= 1 S D _ S EL= 0 1 0 0 .2 66.6 9 5 .2 5 63.5 8 3 .3 66.6 1 3 3 .3 88.7 75 75 124 82.7 6 6 .8 66.8 11 2 74.7 P C I (M H z) 33.3 31.75 33.3 44.3 37.5 41.3 33.4 37.3 A G P (M H z) 6 6 .6 6 3 .5 6 6 .6 8 8 .7 75 8 2 .7 6 6 .8 7 4 .7
3
ICS9148-58
General I2C serial interface information
The information in this section assumes familiarity with I2C programming. For more information, contact ICS for an I2C programming application note.
How to Write:
Send the address D2(H) . Send two additional dummy bytes, a command code and byte count. Send the desired number of data bytes. See the diagram below:
Clock Generator Address (7 bits) + 8 bits dummy command code + 8 bits dummy Byte count Data Byte 1 Data Byte N

A(6:0) & R/W# D2(H)
ACK
ACK
ACK
ACK
ACK
Note that the acknowledge bit is sent by the clock chip, and pulls the data line low. There is no minimum of data bytes that must be sent.
How to Read:

Send the address D3(H). Send the byte count in binary coded decimal Read back the desired number of data bytes See the diagram below:
Clock Generator Address (7 bits) Byte Count Data Byte 1 Data Byte N
A(6:0) & R/W# ACK D3(H)
ACK
ACK
The following specifications should be observed: 1. Operating voltage for I2C pins is 3.3V 2. Maximum data transfer rate (SCLK) is 100K bits/sec.
Serial Configuration Command Bitmap
Byte0: Functionality and Frequency Select Register (default = 0) Bit Description Bit 7 Reserved AGP PCI CPU Clock Bit6 Bit5 Bit4 66.6 33.3 100.2 111 63.5 31.75 95.25 110 66.6 33.3 83.3 101 Bit 88.7 44.3 133.3 100 6:4 75 37.5 75 011 82.7 41.3 124 010 66.8 33.4 66.8 001 74.7 37.3 112 000 0 - Frequency is selected by hardware select, Bit 3 Latched Inputs 1 - Frequency is selected by Bit 6:4 (above) 0 - Spread Spectrum center spread type. Bit 2 1 - Spread Spectrum down spread type. 0.25% to -.5% 0 - Normal Bit 1 1 - Spread Spectrum Enabled 0 Running Bit 0 1--Tristate all outputs 4
PWD 0
Note 1. Default at Power-up will be for latched logic inputs to define frequency. Bits 4, 5, 6 are default to 000, and if bit 3 is written to a 1 to use Bits 6:4, then these should be defined to desired frequency at same write cycle.
Note 1
Note: PWD = Power-Up Default I C is a trademark of Philips Corporation
2
0 0 0 0
ICS9148-58
Byte 1: CPU, Active/Inactive Register (1 = enable, 0 = disable)
Bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # 40 41 43 44 PWD 1 1 1 1 1 1 1 1 Description (Reserved) (Reserved) (Reserved) (Reserved) CPUCLK3 (Act/Inact) CPUCLK2 (Act/Inact) CPUCLK1 (Act/Inact) CPUCLK0 (Act/Inact)
Byte 2: PCI Active/Inactive Register (1 = enable, 0 = disable)
Bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # 7 15 14 12 11 10 8 PWD 1 1 1 1 1 1 1 1 Description (Reserved) PCICLK_F (Act/Inact) AGP0 (Act/Inact) PCICLK4 (Act/Inact) PCICLK3 (Act/Inact) PCICLK2 (Act/Inact) PCICLK1 (Act/Inact) PCICLK0(Act/Inact)
Notes: 1. Inactive means outputs are held LOW and are disabled from switching.
Notes: 1. Inactive means outputs are held LOW and are disabled from switching.
Byte 3: SDRAM Active/Inactive Register (1 = enable, 0 = disable)
Bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # 28 29 31 32 34 35 37 38 PWD 1 1 1 1 1 1 1 1 Description SDRAM7 (Act/Inact) SDRAM6 (Act/Inact) SDRAM5 (Act/Inact) SDRAM4 (Act/Inact) SDRAM3 (Act/Inact) SDRAM2 (Act/Inact) SDRAM1 (Act/Inact) SDRAM0 (Act/Inact)
Byte 4: SDRAM Active/Inactive Register (1 = enable, 0 = disable)
Bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # 17 18 20 21 PWD 1 1 1 1 1 1 1 1 Description (Reserved) (Reserved) (Reserved) (Reserved) SDRAM11 (Act/Inact) (Desktop Mode Only) SDRAM10 (Act/Inact) (Desktop Mode Only) SDRAM9 (Act/Inact) SDRAM8 (Act/Inact)
Notes: 1. Inactive means outputs are held LOW and are disabled from switching. Byte 5: Peripheral Active/Inactive Register (1 = enable, 0 = disable)
Bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # 47 46 2 PWD 1 1 1 1 1 1 1 1 Description (Reserved) (Reserved) (Reserved) AGP1(Act/Inact) (Reserved) (Reserved) REF1 (Act/Inact) REF0 (Act/Inact)
Notes: 1. Inactive means outputs are held LOW and are disabled from switching.
Notes: 1. Inactive means outputs are held LOW and are disabled from switching.
5
ICS9148-58
CPU_STOP# Timing Diagram
CPU_STOP# is an asychronous input to the clock synthesizer. It is used to turn off the CPU clocks for low power operation. CPU_STOP# is synchronized by the ICS9148-58. The minimum that the CPU clock is enabled (CPU_STOP# high pulse) is 100 CPU clocks. All other clocks will continue to run while the CPU clocks are disabled. The CPU clocks will always be stopped in a low state and start in such a manner that guarantees the high pulse width is a full pulse. CPU clock on latency is less than 4 CPU clocks and CPU clock off latency is less than 4 CPU clocks.
Notes: 1. All timing is referenced to the internal CPU clock. 2. CPU_STOP# is an asynchronous input and metastable conditions may exist. This signal is synchronized to the CPU clocks inside the ICS9148-58. 3. All other clocks continue to run undisturbed. (including SDRAM outputs).
6
ICS9148-58
PCI_STOP# Timing Diagram
PCI_STOP# is an asynchronous input to the ICS9148-58. It is used to turn off the PCICLK (0:5) clocks for low power operation. PCI_STOP# is synchronized by the ICS9148-58 internally. The minimum that the PCICLK (0:5) clocks are enabled (PCI_STOP# high pulse) is at least 10 PCICLK (0:5) clocks. PCICLK (0:5) clocks are stopped in a low state and started with a full high pulse width guaranteed. PCICLK (0:5) clock on latency cycles are only one rising PCICLK clock off latency is one PCICLK clock.
Notes: 1. All timing is referenced to the Internal CPUCLK (defined as inside the ICS9148 device.) 2. PCI_STOP# is an asynchronous input, and metastable conditions may exist. This signal is required to be synchronized inside the ICS9148. 3. All other clocks continue to run undisturbed. 4. CPU_STOP# is shown in a high (true) state.
7
ICS9148-58
Shared Pin Operation Input/Output Pins
Pins 1 and 2 on the ICS9148-58 serve as dual signal functions to the device. During initial power-up, they act as input pins. The logic level (voltage) that is present on these pins at this time is read and stored into a 4-bit internal data latch. At the end of Power-On reset, (see AC characteristics for timing values), the device changes the mode of operations for these pins to an output function. In this mode the pins produce the specified buffered clocks to external loads. To program (load) the internal configuration register for these pins, a resistor is connected to either the VDD (logic 1) power supply or the GND (logic 0) voltage potential. A 10 Kilohm(10K) resistor is used to provide both the solid CMOS programming voltage needed during the power-up programming period and to provide an insignificant load on the output clock during the subsequent operating period. Figs. 1 and 2 show the recommended means of implementing this function. In Fig. 1 either one of the resistors is loaded onto the board (selective stuffing) to configure the devices internal logic. Figs. 2a and b provide a single resistor loading option where either solder spot tabs or a physical jumper header may be used. These figures illustrate the optimal PCB physical layout options. These configuration resistors are of such a large ohmic value that they do not effect the low impedance clock signals. The layouts have been optimized to provide as little impedance transition to the clock signal as possible, as it passes through the programming resistor pad(s).
Fig. 1
8
ICS9148-58
Fig. 2a
Fig. 2b
9
ICS9148-58
Absolute Maximum Ratings
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0 V Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND 0.5 V to VDD +0.5 V Ambient Operating Temperature . . . . . . . . . . . . 0C to +70C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . 65C to +150C 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.
Electrical Characteristics - Input/Supply/Common Output Parameters
TA = 0 - 70C; Supply Voltage VDD = VDDL = 3.3 V +/-5% (unless otherwise stated) PARAMETER Input High Voltage Input Low Voltage Input High Current Input Low Current Input Low Current Operating Supply Current Input frequency Input Capacitance1 Transition Time Settling Time
1 1 1
SYMBOL CONDITIONS VIH VIL VIN = VDD IIH VIN = 0 V; Inputs with no pull-up resistors IIL1 VIN = 0 V; Inputs with pull-up resistors IIL2 CL = 0 pF; 66.8 MHz IDD3.3OP CL = 0 pF; 133 MHz VDD = 3.3 V; Fi Logic Inputs CIN X1 & X2 pins CINX Ttrans Ts TSTAB TCPU-PCI TCPU-SDRAM To 1st crossing of target Freq. From 1st crossing to 1% target Freq. From VDD = 3.3 V to 1% target Freq. VT = 1.5 V; CPU leads VT = 1.5 V; Window
MIN 2 VSS-0.3 -5 -200
TYP
12 27
0.1 2.0 -100 100 200 14.318 36
MAX UNITS VDD+0.3 V 0.8 V A 5 A A 160 320 16 5 45 3 2 3 4 250 mA MHz pF pF ms ms ms ns ps
Clk Stabilization Skew1
1
1
3 100
Guaranteed by design, not 100% tested in production.
Electrical Characteristics - Input/Supply/Common Output Parameters
TA = 0 - 70C; Supply Voltage VDD = 3.3 V +/-5%, VDDL = 2.5 V +/-5% (unless otherwise stated) PARAMETER Operating Supply Current Skew1
1
SYMBOL IDD2.5OP TCPU-PCI TCPU-SDRAM
CONDITIONS CL = 0 pF; 66.8 MHz CL = 0 pF;133 MHz VT = 1.5 V; CPU leads VT = 1.5 V; Window
MIN
1
TYP 10 20 3 100
MAX 20 40 4 250
UNITS mA ns ps
Guaranteed by design, not 100% tested in production.
10
ICS9148-58
Electrical Characteristics - CPU
TA = 0 - 70C; VDD = VDDL = 3.3 V +/-10%; CL = 10 - 20 pF (unless otherwise stated) PARAMETER Output High Voltage Output Low Voltage Output High Current Output Low Current Rise Time Fall Time Duty Cycle Skew Jitter, One Sigma Jitter, Absolute
1
SYMBOL VOH2A VOL2A IOH2A IOL2A tr2A1 tf2A1 dt2A1 tsk2A1 tj1s2A1 tjabs2A1
CONDITIONS IOH = -28 mA IOL = 27 mA VOH = 2.0 V VOL = 0.8 V VOL = 0.4 V, VOH = 2.4 V VOH = 2.4 V, VOL = 0.4 V VT = 1.5 V VT = 1.5 V VT = 1.5 V VT = 1.5 V
MIN 2.5
33
TYP 2.6 0.35 -29 37 1.75 1.1
MAX UNITS V 0.4 V -23 mA mA 2 2 55 250 150 250 ns ns % ps ps ps
45
50 50 65
-250
165
Guaranteed by design, not 100% tested in production.
Electrical Characteristics - CPU
T A = 0 - 70C; VDD = 3.3 V +/-5%, V DDL = 2.5 V +/-5%; C L = 10 - 20 pF (unless otherwise stated) PARAM ETER Output High Voltage Output Low Voltage Output High Current Output Low Current Rise Time Fall Time Duty Cycle Skew Jitter, Single Edge Displacement 2 Jitter, One Sigma Jitter, Absolute
1 2
SYM BOL VOH2B VOL2B IOH2B IOL2B tr2B 1 tf2B
1
CONDITIONS IOH = -8 mA IOL = 12 mA VOH = 1.7 V VOL = 0.7 V VOL = 0.4 V, VOH = 2.0 V VOH = 2.0 V, VOL = 0.4 V VT = 1.25 V VT = 1.25 V VT = 1.25 V VT = 1.25 V VT = 1.25 V
M IN 2
19
TYP 2.2 0.3 -20 26 1.5 1.6
M AX 0.4 -16 1.8 1.8 55 250 250 150 300
UNITS V V mA mA ns ns % ps ps ps ps
dt2B 1 tsk2B 1 tjsed2B 1 tj1s2B 1 tjabs2B 1
40
47 60 200 65
-300
160
Guaranteed by design, not 100% tested in production. Edge displacement of a period relative to a 10-clock-cycle rolling average period.
11
ICS9148-58
Electrical Characteristics - PCI
T A = 0 - 70C; V DD = VDDL = 3.3 V +/-10%; C L = 30 pF (unless otherwise stated) PARAM ETER Output High Voltage Output Low Voltage Output High Current Output Low Current Rise Time Fall Time Duty Cycle Skew Jitter, One Sigma Jitter, A bs olute
1 1
SYM BOL VOH1 VOL1 IOH1 IOL1 t r1 t f1
1 1
CONDITIONS IOH = -28 mA IOL = 23 mA VOH = 2.0 V VOL = 0.8 V VOL = 0.4 V, VOH = 2.4 V VOH = 2.4 V, VOL = 0.4 V VT = 1.5 V VT = 1.5 V VT = 1.5 V, s ynchronous VT = 1.5 V, as ynchronous VT = 1.5 V, s ynchronous VT = 1.5 V, as ynchronous
M IN 2.4
41
TYP 3 0.2 -60 50 1.8 1.6
M AX 0.4 -40 2 2 55 250 150 250 250 650
UNITS V V mA mA ns ns % ps ps ps ps ps
d t1 1 ts k 1 1 tj1s1a tj1s1b tabs1a tjabs1b
45
51 130 40 200
1
-250 -650
135 500
Guaranteed by design, not 100% tested in production.
Electrical Characteristics - SDRAM
TA = 0 - 70C; VDD = VDDL = 3.3 V +/-5%; CL = 30 pF PA RA M ETER Output High Voltage Output Low Voltage Output High Current Output Low Current Ris e Time Fall Time Skew
1 1 1 1 1
SYM BOL VOH1 VOL1 IOH1 IOL1 Tr1 Tf1 Dt1 Tsk1 Tj1s1 Tjabs1 Tjabs1
CONDITIONS IOH = -28 mA IOL = 23 mA VOH = 2.0 V VOL = 0.8 V VOL = 0.4 V, VOH = 2.4 V VOH = 2.4 V, VOL = 0.4 V VT = 1.5 V VT = 1.5 V VT = 1.5 V VT = 1.5 V (with s ynchronous PCI) VT = 1.5 V (with as ynchronous PCI)
M IN 2.4
41
TYP 3 0.2 -60 50 1.75 1.5
M A X UNITS V 0.4 V -40 mA mA 2 2 55 500 150 +250 400 ns ns % ps ps ps ps
Duty Cycle
45
50 200 50
Jitter, One Sigma Jitter, A bs olute Jitter, A bs olute
1
1 1
-250 -400
Guaranteed by des ign, not 100% tes ted in production.
12
ICS9148-58
Electrical Characteristics - AGP
TA = 0 - 70C; VDD = VDDL = 3.3 V +/-10%; CL = 30 pF (unless otherwise stated) PARAMETER SYMBOL CONDITIONS IOH = -28 mA Output High Voltage VOH1 IOL = 23 mA Output Low Voltage VOL1 Output High Current IOH1 VOH = 2.0 V Output Low Current IOL1 VOL = 0.8 V 1 Rise Time tr1 VOL = 0.4 V, VOH = 2.4 V VOH = 2.4 V, VOL = 0.4 V Fall Time tf11 1 VT = 1.4 V Duty Cycle dt1 1 Skew tsk1 VT = 1.5 V Jitter, One Sigma Jitter, Absolute1
1 1
MIN 2.4
41
45
TYP 3 0.2 -60 50 1.1 1 49 130 2 2.5 4.5
MAX UNITS V 0.4 V -40 mA mA 2 ns 2 ns 55 % 250 ps 3 5 6 % % %
tj1s1 tabs1a tjabs1b
VT = 1.5 V VT = 1.5 V, synchronous VT = 1.5 V, asynchronous -5 -6
Guaranteed by design, not 100% tested in production.
Electrical Characteristics - 24MHz, 48MHz, REF0
TA = 0 - 70C; VDD = VDDL = 3.3 V +/-10%; CL = 10 -20 pF (unless otherwise stated) PARAMETER SYMBOL CONDITIONS IOH = -16 mA Output High Voltage VOH5 IOL = 9 mA Output Low Voltage VOL5 VOH = 2.0 V Output High Current IOH5 VOL = 0.8 V Output Low Current IOL5 1 VOL = 0.4 V, VOH = 2.4 V Rise Time tr5 1 VOH = 2.4 V, VOL = 0.4 V Fall Time tf5 VT = 1.5 V Duty Cycle dt51 1 VT = 1.5 V Jitter, One Sigma tj1s5 VT = 1.5 V tjabs51 Jitter, Absolute
1
MIN 2.4
16
45 -5
TYP 2.6 0.3 -32 25 2 1.9 54 1 -
MAX UNITS V 0.4 V -22 mA mA 4 ns 4 ns 57 % 3 % 5 %
Guaranteed by design, not 100% tested in production.
13
ICS9148-58
SSOP Package
SYMBOL A A1 A2 B C D E e H h L N
X
COMMON DIMENSIONS MIN. NOM. MAX. .095 .101 .110 .008 .012 .016 .088 .090 .092 .008 .010 .0135 .005 .010 See Variations .292 .296 .299 0.025 BSC .400 .406 .410 .010 .013 .016 .024 .032 .040 See Variations 0 5 8 .085 .093 .100
VARIATIONS AC MIN. .620
D NOM. .625
N MAX. .630 48
Ordering Information
ICS9148F-58
Example:
ICS XXXX F - PPP
Pattern Number (2 or 3 digit number for parts with ROM code patterns) Package Type F=SSOP Device Type (consists of 3 or 4 digit numbers) Prefix ICS, AV = Standard Device
14
ICS reserves the right to make changes in the device data identified in this publication without further notice. ICS advises its customers to obtain the latest version of all device data to verify that any information being relied upon by the customer is current and accurate.

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