AT123S AME | Alldatasheet

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AME, Inc. Rev.A.01 1 AT123S PCI Arbiter l PCI Arbiter Extend PCI Devices from One to Three l PCI Clock Frequency Support PCI Clock range from 25MHz to 66MHz AT123S is a PCI arbiter. It allows users to extend sys- tem PCI devices or slots without piecing additional cir- cuit to simply design complexity and increase system stability. AT123S also provides STOP# input pin with that extended PCI devices is able to instruct the PCI master to prematurely end the transaction on the current data phase same as one defined in PCI specification. n General Description n Features l All AME's Lead Free Products Meet RoHS Standards SYSREQ # 1 16 STOP# SYSGNT # 2 15 VCC PCIREQ1# 3 14 PCICLKi VSS 4 13 PCIRESET# PCIGNT1# 5 12 VSS PCIREQ2# 6 11 VCC VCC 7 10 PCIGNT3# PCIGNT2# 8 9 PCIREQ3# A T S n Pin Configuration ※ Ordering Information AT123S- Commercial Standard AT123SG- Green Device with Commercial Standard

1 SYSREQ# PP12 Request signal to chipset

2 SYSGNT# INt Grant signal from chipset

3 PCIREQ1# INt Request signal from PCI bus (Internal 5K pull-up resistor)

5 PCIGNT1# PP12 Grant signal to PCI bus

6 PCIREQ2# INt Request signal from PCI bus (Internal 5K pull-up resistor)

8 PCIGNT2# PP12 Grant signal to PCI bus

9 PCIREQ3# INt Request signal from PCI bus (Internal 5K pull-up resistor)

10 PCIGNT3# PP12 Grant signal to PCI bus

13 PCIRESET# INt PCI bus reset#

14 PCICLKi INt PCICLK input reference frequency

16 STOP# INt PCI bus stop#

4 VSS PWR Ground

12 VSS PWR Ground

Table 1. PCI Arbiter FSM Group Signal

Table 2. Power/Ground Pin Table 3. PCI Arbiter FSM

AME, Inc. 4 Rev.A.01 PCI ArbiterAT123S n Package Dimension SOP-16 MIN MAX MIN MAX A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.004 0.010 b C e E 3.81 4.00 0.150 0.157 D 9.80 10.00 0.386 0.394 h H 5.80 6.20 0.228 0.244 L 0.41 1.27 0.016 0.050 q 0o 8o 0o 8o 0.38TYP 0.015TYP 0.40TYP 0.018TYP 0.20TYP 0.008TYP 1.27TYP 0.050TYP SYMBOLS MILLIMETERS INCHES b e E H 916 TOP VIEW D A SEATING PLANE 0.004 max FRONT VIEW h C SIDE VIEW L DETAL : A"0'

Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information.  AME, Inc. , July 2007 Document: ATT-DSAT123S-A.01 Corporate Headquarter U.S.A. (Subsidiary) AME, Inc. Analog Microelectronics, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District 3100 De La Cruz Blvd., Suite 201 Taipei 114, Taiwan. Santa Clara, CA. 95054-2046 Tel : 886 2 2627-8687 Tel: (408) 988-2388 Fax: 886 2 2659-2989 Fax: (408) 988-2489 www.ame.com.tw E-Mail: sales@ame.com.tw