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| CMOS 512K8-Bit Mask ROM Features * * HT23C040 * Operating voltage: 2.7V~5.5V Low power consumption - Operation: 25mA max. (V CC=5V) 10mA max. (VCC=3V) - Standby: 30mA max. (V CC=5V) 10mA max. (VCC=3V) Access time: 120ns max. (VCC=5V) 250ns max. (VCC=3V) * * * * * * 5242888-bit of mask ROM Mask option: chip enable CE/CE/OE1/OE1, and output enable OE/OE/NC TTL compatible inputs and outputs Tristate outputs Fully static operation Package type: 32-pin DIP/SOP General Description The HT23C040 is a read-only memory with high performance CMOS storage device whose 4096K of memory is arranged into 524288 word by 8 bits. For application flexibility, the chip enable and output enable control pins can be selected as active high or active low. This flexibility not only allows easy interface with most microprocessors, but also eliminates bus contention in multiple bus microprocessor systems. An additional feature of the HT23C040 is its ability to enter the standby mode whenever the chip enable (CE/CE) is inactive, thus reducing current consumption to below 30mA. The combination of these functions makes the chip suitable for high density low power memory applications. 1 January 20, 2000 HT23C040 Block Diagram P re -c h a rg e C K T A0 XY P re -d e c o d e r A d d re s s B u ffe rs A18 ATD X -D e c Y -D e c P u ll- h ig h N M O S R O M C e ll A rra y ( 5 1 2 K 8 - B its ) Z -D e c Z - s e le c to r S e n s e A m p lifie r s C E /C E /O E 1 /O E 1 O E /O E /N C M ux CTRL L a tc h M ux O u tp u t B u ffe rs VSS VCC D0 D7 Pin Assignment NC A16 A15 A12 A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 VSS 9 10 11 12 13 14 15 16 8 7 6 5 4 3 2 1 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 VCC A18 A17 A14 A13 A8 A9 A11 O E /O E /N C A10 C E /C E /O E 1 /O E 1 D7 D6 D5 D4 D3 H T23C 040 3 2 D IP /S O P 2 January 20, 2000 HT23C040 Pin Description Pin Name NC A0~A18 D0~D7 VSS CE/CE/OE1/OE1 OE/OE/NC VCC I/O 3/4 I O 3/4 I I 3/4 No connection Address inputs Data outputs Negative power supply Chip enable/Output enable input Output enable input Positive power supply Description Operation Truth Table Mode Read Deselect Standby CE/CE H/L H/L L/H OE/OE H/L L/H X A0~A18 Valid X X D0~D7 Data Out High Z High Z Note: H=VIH, L=VIL, X=VIH or VIL Absolute Maximum Ratings Supply Voltage.................................-0.3V to 6V Input Voltage .......................-0.3V to VCC+0.3V Storage Temperature.................-50C to 125C Operating Temperature ..............-40C to 85C Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. 3 January 20, 2000 HT23C040 D.C. Characteristics Supply voltage: 4.5V~5.5V Symbol VCC ICC1 VIL1 VIH1 VOL1 VOH1 ILI ILO ISTB1 ISTB2 CIN COUT Parameter Operating Voltage Operating Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage Input Leakage Current Output Leakage Current Standby Current Standby Current Input Capacitance (See note) Output Capacitance (See note) Test Conditions VCC 3/4 5V 5V 5V 5V 5V 5V 5V 5V 5V 3/4 3/4 Conditions 3/4 O/P Unload, f=5MHz 3/4 3/4 IOL=3.2mA IOH=-1mA VIN=0 to VCC VOUT=0 to VCC CE=VIL CE=VIH CE0.2V CEVCC-0.2V f=1MHz f=1MHz Min. 4.5 3/4 VSS 2.2 3/4 2.4 3/4 3/4 3/4 3/4 3/4 3/4 Ta=-40C to 85C Typ. 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 Max. Unit 5.5 25 0.8 VCC 0.4 VCC 10 10 1.5 30 10 10 V mA V V V V mA mA mA mA pF pF 4 January 20, 2000 HT23C040 Supply voltage: 2.7V~3.3V Symbol VCC ICC2 VIL2 VIH2 VOL2 VOH2 ILI ILO CIN COUT Parameter Operating Voltage Operating Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage Input Leakage Current Output Leakage Current Input Capacitance (See Note) Output Capacitance (See Note) Test Conditions VCC 3/4 3V 3V 3V 3V 3V 3V 3V 3/4 3/4 Conditions 3/4 O/P Unload, f=5MHz 3/4 3/4 IOL=2mA IOH=-0.6mA VIN=0 to VCC VOUT=0 to VCC f=1MHz f=1MHz Min. 2.7 3/4 VSS 1.5 3/4 1.5 3/4 3/4 3/4 3/4 Ta=-40C to 85C Typ. 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 Max. Unit 3.3 10 0.4 VCC 0.4 VCC 10 10 10 10 V mA V V V V mA mA pF pF Note: These parameters are periodically sampled but not 100% tested. A.C. Characteristics Symbol tCYC tAA tACE tAOE tOH tOD tOE Parameter Cycle Time Address Access Time Chip Enable Access Time Output Enable Access Time Output Hold Time Output Disable Time (See Note) Output Enable Time (See Note) 3V10% Min. 200 3/4 3/4 3/4 3/4 3/4 3/4 Max. 3/4 250 250 150 3/4 3/4 3/4 Min. 120 3/4 3/4 3/4 10 3/4 10 Ta=-40C to 85C 5V10% Max. 3/4 120 120 80 3/4 70 3/4 Unit ns ns ns ns ns ns ns Note: These parameters are periodically sampled but not 100% tested. 5 January 20, 2000 HT23C040 A.C. test condition Output load: see figure right Input rise and fall time: 10ns Input pulse levels: 0.4V to 2.4V Input and output timing reference levels: 0.8V and 2.0V (VCC=5V) 1.5V (VCC=3V) O u tp u t 775W 100pF* V CC 1250W * In c lu d in g s c o p e a n d jig Output load circuit Functional Description The HT23C040 has two modes, namely data read mode and standby mode, controlled by CE/CE/OE1/OE1 and OE/OE/NC inputs. * Standby mode * Data read mode The HT23C040 has lower current consumption, controlled by the chip enable input (CE/CE). When a low/high level is applied to the CE/CE input regardless of the output enable (OE/OE/NC) states, the chip will enter the standby mode. When both the chip enable (CE/CE/OE1/OE1) and the output enable (OE/OE/NC) are active, the chip is in data read mode. Otherwise, active CE/CE and inactive OE/OE/NC result in deselect mode. The output will remain in Hi-Z state. Timing Diagrams * Propagation delay due to address (CE/CE/OE1/OE1 and OE/OE are active) tC A d d re s s tA A YC V a lid tO H D out V a lid * Propagation delay due to chip and output enable (address valid) tA CE CE tA OE OE tO E OE CE tO D D out V a lid 6 January 20, 2000 HT23C040 Characteristic Curves 1 .5 C 1 .2 O p e r a tin g C u r r e n t IC (N o r m a liz e d ) C O p e r a tin g C u r r e n t IC (N o r m a liz e d ) 1 .2 5 1 0 .7 5 0 .5 1 .1 1 0 .9 0 .8 4 .5 5 O p e r a tin g V o lta g e V C C (V ) 5 .5 V CC -5 0 -2 5 0 25 50 75 Ta=25 C =5V T e m p e ra tu re ( C ) 1 .5 TB2 1 .4 TB2 S ta n d b y C u r r e n t IS (N o r m a liz e d ) S ta n d b y C u r r e n t IS (N o r m a liz e d ) 1 .2 5 1 0 .7 5 0 .5 1 .2 5 1 .1 0 .9 5 0 .8 4 .5 5 O p e r a tin g V o lta g e V CC 5 .5 (V ) V CC -5 0 -2 5 0 25 50 75 Ta=25 C =5V T e m p e ra tu re ( C ) 1 .2 1 .1 1 0 .9 0 .8 Ta=25 C AA A 1 .5 1 .2 5 1 0 .7 5 0 .5 V =5V 4 .5 5 O p e r a tin g V o lta g e V CC 5 .5 (V ) CC A c c e s s T im e T A (N o r m a liz e d ) A c c e s s T im e T (N o r m a liz e d ) -5 0 -2 5 0 25 50 75 T e m p e ra tu re ( C ) 7 January 20, 2000 HT23C040 1 .2 1 .1 1 0 .9 0 .8 Ta=25 C CE 1 .5 1 .2 5 1 0 .7 5 0 .5 4 .5 5 O p e r a tin g V o lta g e V CC CE A c c e s s T im e T A (N o r m a liz e d ) A c c e s s T im e T A (N o r m a liz e d ) 5 .5 (V ) V CC -5 0 -2 5 0 25 50 75 =5V T e m p e ra tu re ( C ) 1 .2 1 .1 1 0 .9 0 .8 Ta=25 C AOE OE 1 .5 1 .2 5 1 0 .7 5 0 .5 4 .5 5 O p e r a tin g V o lta g e V CC A c c e s s T im e T (N o r m a liz e d ) A c c e s s T im e T A (N o r m a liz e d ) 5 .5 (V ) V CC -5 0 =5V -2 5 0 25 50 75 100 T e m p e ra tu re ( C ) 8 January 20, 2000 HT23C040 HT23C040 MASK ROM ORDERING SHEET Custom: Input Medium: EPROM User No. DISK File (Mail Address: romfile@holtek.com.tw) Type/Ref. Name Qty Check Sum OTHER Memory Address Start End Control Pin and Package Form Option: (1) CE (2) CE (3) OE1 (4) OE1 (a) 32 Pin Type Pin 22: Pin 24: (1) OE (2) OE (3) NC (1) Chip Form (2) 32 DIP (3) 32 SOP (b) Package Form: Companion User No. Package Marking : Delivery Date : Qty: CUSTOM CONFIRMED BY: (NAME, DATE, POSITION & CO. CHOP) HOLTEK CONFIRMED BY: (SALES) (SALES MANAGER) 9 January 20, 2000 HT23C040 Holtek Semiconductor Inc. (Headquarters) No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: 886-3-563-1999 Fax: 886-3-563-1189 Holtek Semiconductor Inc. (Taipei Office) 5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C. Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (International sales hotline) Holtek Semiconductor (Hong Kong) Ltd. RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Copyright a 2000 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. 10 January 20, 2000 |
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